revive llvm builder utility (#154)

Pre-eliminary support for LLVM releases and resolc binary releases by streamlining the build process for all supported hosts platforms. - Introduce the revive-llvm-builder crate with the revive-llvm builder utilty. - Do not rely on the LLVM dependency in $PATH to decouple the system LLVM installation from the LLVM host dependency. - Fix the emscripten build by decoupling the host and native LLVM dependencies. Thus allowing a single LLVM emscripten release that can be used on any host platform. - An example Dockerfile building an alpine container with a fully statically linked resolc ELF binary. - Remove the Debian builder utilities and workflow.
2026-04-21 23:48:05 +00:00 · 2025-01-13 15:58:27 +01:00
parent fde9edab10
commit 7f81f37e0c
65 changed files with 4847 additions and 557 deletions
@@ -0,0 +1,7 @@
+emsdk
+llvm*/
+target-llvm/
+target/
+node_modules/
+utils/
+build/
@@ -0,0 +1 @@
+1
@@ -1,38 +0,0 @@
-name: Build revive-debian
-on:
-  workflow_dispatch:
-
-env:
-  REVIVE_DEBIAN_PACKAGE: revive-debian-x86
-  DEBIAN_CONTAINER: revive-builder-debian-x86
-  DEBIAN_CONTAINER_BUILDER: build-debian-builder.sh
-  DEBIAN_CONTAINER_RUNNER: run-debian-builder.sh
-  REVIVE_DEBIAN_INSTALL: ${{ github.workspace }}/target/release
-  REVIVE_DEBIAN_BINARY: resolc
-  RUST_VERSION: "1.81"
-
-jobs:
-  build-revive-debian-x86:
-    name: debian-container-x86
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: build-container
-        run: |
-          (cd utils && ./${{ env.DEBIAN_CONTAINER_BUILDER}} --build-arg RUST_VERSION=${{ env.RUST_VERSION}} . )
-
-      - name: build-revive-debian
-        run: |
-          rustup show
-          cargo --version
-          rustup +nightly show
-          cargo +nightly --version
-          bash --version
-          utils/${{ env.DEBIAN_CONTAINER_RUNNER }} utils/build-revive.sh -o ${{ env.REVIVE_DEBIAN_INSTALL}}
-
-      - uses: actions/upload-artifact@v4
-        with:
-          name: ${{ env.REVIVE_DEBIAN_PACKAGE }}
-          path: ${{ env.REVIVE_DEBIAN_INSTALL }}/${{ env.REVIVE_DEBIAN_BINARY }}
-          retention-days: 1
@@ -14,7 +14,7 @@ env:

 jobs:
  build-revive-wasm:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
    defaults:
      run:
        shell: bash
@@ -26,24 +26,30 @@ jobs:
        uses: actions/cache@v3
        with:
          path: |
-            llvm18.0-emscripten
+            target-llvm
          # Use a unique key based on LLVM version or configuration files to avoid cache invalidation
-          key: llvm-build-${{ runner.os }}-${{ hashFiles('clone-llvm.sh', 'emscripten-build-llvm.sh') }}
+          key: llvm-build-${{ runner.os }}-${{ hashFiles('LLVM.lock', '.github/trigger-wasm-llvm-build') }}

      - name: Install Dependencies
        run: |
-          sudo apt-get update && sudo apt-get install -y cmake ninja-build libncurses5
+          # system dependencies
+          sudo apt-get update && sudo apt-get install -y cmake ninja-build curl git libssl-dev pkg-config clang lld
          rustup target add wasm32-unknown-emscripten
-          # Install LLVM required for the compiler runtime, runtime-api and stdlib
-          curl -sSL --output llvm.tar.xz https://github.com/llvm/llvm-project/releases/download/llvmorg-18.1.4/clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04.tar.xz
-          tar Jxf llvm.tar.xz
-          mv clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04 llvm18/
-          echo "$(pwd)/llvm18/bin" >> $GITHUB_PATH
-          # Install Emscripten
-          git clone https://github.com/emscripten-core/emsdk.git
-          cd emsdk
-          ./emsdk install ${{ env.EMSCRIPTEN_VERSION }}
-          ./emsdk activate ${{ env.EMSCRIPTEN_VERSION }}
+          # host LLVM
+          curl -sSL --output llvm.tar.xz https://github.com/paritytech/revive/releases/download/v0.1.0-dev.7/clang+llvm-18.1.8-x86_64-linux-gnu-ubuntu-24.04.tar.xz
+          mkdir llvm18
+          tar Jxf llvm.tar.xz -C llvm18/
+          echo "LLVM_SYS_181_PREFIX=$(pwd)/llvm18" >> $GITHUB_ENV
+          # Clone LLVM and install the Emscripten SDK
+          make install-llvm-builder
+          revive-llvm --target-env emscripten clone
+
+      - name: Build target LLVM
+        if: steps.cache-llvm.outputs.cache-hit != 'true'
+        run: |
+          source emsdk/emsdk_env.sh
+          revive-llvm --target-env emscripten build
+          echo "REVIVE_LLVM_TARGET_PREFIX=${PWD}/target-llvm/emscripten/target-final" >> $GITHUB_ENV

      - run: |
          rustup show
@@ -52,13 +58,6 @@ jobs:
          cargo +nightly --version
          cmake --version
          bash --version
-          llvm-config --version
-
-      - name: Build LLVM
-        if: steps.cache-llvm.outputs.cache-hit != 'true'
-        run: |
-          export EMSDK_ROOT=${PWD}/emsdk
-          ./emscripten-build-llvm.sh

      - name: Use Cached LLVM
        if: steps.cache-llvm.outputs.cache-hit == 'true'
@@ -67,8 +66,7 @@ jobs:

      - name: Build revive
        run: |
-          export LLVM_LINK_PREFIX=${PWD}/llvm18.0-emscripten
-          source ./emsdk/emsdk_env.sh
+          source emsdk/emsdk_env.sh
          make install-wasm

      - uses: actions/upload-artifact@v4
@@ -83,7 +81,7 @@ jobs:
    needs: build-revive-wasm
    strategy:
      matrix:
-        os: ['ubuntu-24.04', 'macos-14', 'windows-2022']
+        os: ["ubuntu-24.04", "macos-14", "windows-2022"]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v4
@@ -100,7 +98,7 @@ jobs:
      - name: Set Up Node.js
        uses: actions/setup-node@v3
        with:
-          node-version: '20'
+          node-version: "20"

      - name: Install Bun on Windows
        if: runner.os == 'Windows'
@@ -11,7 +11,7 @@ env:

 jobs:
  build-ubuntu-x86:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@v4
@@ -25,16 +25,16 @@ jobs:

      - name: Install LLVM
        run: |
-          curl -sSL --output llvm.tar.xz https://github.com/llvm/llvm-project/releases/download/llvmorg-18.1.4/clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04.tar.xz
-          tar Jxf llvm.tar.xz
-          mv clang+llvm-18.1.4-x86_64-linux-gnu-ubuntu-18.04 llvm18/
-          echo "$(pwd)/llvm18/bin" >> $GITHUB_PATH
+          curl -sSL --output llvm.tar.xz https://github.com/paritytech/revive/releases/download/v0.1.0-dev.7/clang+llvm-18.1.8-x86_64-linux-gnu-ubuntu-24.04.tar.xz
+          mkdir llvm18
+          tar Jxf llvm.tar.xz -C llvm18/
+          echo "LLVM_SYS_181_PREFIX=$(pwd)/llvm18" >> $GITHUB_ENV

      - name: Install apt dependencies
        run: |
          sudo add-apt-repository -y ppa:ethereum/ethereum
          sudo apt update
-          sudo apt install -y libtinfo5 ethereum
+          sudo apt install -y ethereum

      - name: Format
        run: make format
@@ -1,4 +1,5 @@
 /target
+target-llvm
 *.dot
 .vscode/
 .DS_Store
@@ -6,9 +7,7 @@
 /*.yul
 /*.ll
 /*.s
-/llvm-project
-/llvm18.0
-/llvm18.0-emscripten
+/llvm*
 node_modules
 artifacts
 tmp
@@ -16,3 +15,4 @@ package-lock.json
 /*.html
 /build
 soljson.js
+emsdk
@@ -2,6 +2,17 @@

 ## Unreleased

+This is a development pre-release.
+
+### Added
+- The `revive-llvm-builder` crate with the `revive-llvm` helper utility for streamlined management of the LLVM framework dependency.
+
+### Changed
+- The minimum supported Rust version is `1.81.0`.
+
+### Fixed
+- Decouple the LLVM target dependency from the LLVM host dependency.
+
 ## v0.1.0-dev.7

 This is a development pre-release.
@@ -26,6 +26,7 @@ revive-runtime-api = { version = "0.1.0-dev.7", path = "crates/runtime-api" }
 revive-runner = { version = "0.1.0-dev.7", path = "crates/runner" }
 revive-solidity = { version = "0.1.0-dev.7", path = "crates/solidity" }
 revive-stdlib = { version = "0.1.0-dev.7", path = "crates/stdlib" }
+revive-build-utils = { version = "0.1.0-dev.7", path = "crates/build-utils" }

 hex = "0.4"
 petgraph = "0.6"
@@ -63,7 +64,16 @@ env_logger = { version = "0.10.0", default-features = false }
 serde_stacker = "0.1"
 criterion = { version = "0.5", features = ["html_reports"] }
 log = { version = "0.4" }
-git2 = "0.19.0"
+git2 = { version = "0.19.0", default-features = false }
+downloader = "0.2.8"
+flate2 = "1.0.35"
+http = "1.2.0"
+fs_extra = "1.3.0"
+num_cpus = "1"
+tar = "0.4.4"
+toml = "0.8"
+assert_cmd = "2.0.16"
+assert_fs = "1.1.2"

 # polkadot-sdk and friends
 codec = { version = "3.6.12", default-features = false, package = "parity-scale-codec" }
@@ -0,0 +1,32 @@
+FROM rust:1.84.0 AS llvm-builder
+WORKDIR /opt/revive
+
+RUN apt update && \ 
+    apt upgrade -y && \
+    apt install -y cmake ninja-build curl git libssl-dev pkg-config clang lld musl
+
+COPY . .
+
+RUN make install-llvm-builder
+RUN revive-llvm --target-env musl clone
+RUN revive-llvm --target-env musl build
+
+FROM messense/rust-musl-cross:x86_64-musl AS resolc-builder
+WORKDIR /opt/revive
+
+RUN apt update && \ 
+    apt upgrade -y && \
+    apt install -y pkg-config
+
+COPY . .
+COPY --from=llvm-builder /opt/revive/target-llvm /opt/revive/target-llvm
+
+ENV LLVM_SYS_181_PREFIX=/opt/revive/target-llvm/musl/target-final
+RUN make install-bin
+
+FROM alpine:latest
+ADD https://github.com/ethereum/solidity/releases/download/v0.8.28/solc-static-linux /usr/bin/solc
+COPY --from=resolc-builder /root/.cargo/bin/resolc /usr/bin/resolc
+
+RUN apk add --no-cache libc6-compat
+RUN chmod +x /usr/bin/solc 
@@ -0,0 +1,2 @@
+url = "https://github.com/llvm/llvm-project.git"
+branch = "release/18.x"
@@ -1,4 +1,4 @@
-.PHONY: install format test test-solidity test-cli test-integration test-workspace test-wasm clean docs docs-build
+.PHONY: install format test test-solidity test-cli test-integration test-workspace test-wasm clean install-llvm install-llvm-builder

 RUSTFLAGS_EMSCRIPTEN := \
 	-C link-arg=-sEXPORTED_FUNCTIONS=_main,_free,_malloc \
@@ -28,16 +28,16 @@ install-npm:
 install-wasm: install-npm
 	RUSTFLAGS='$(RUSTFLAGS_EMSCRIPTEN)' cargo build --target wasm32-unknown-emscripten -p revive-solidity --release --no-default-features

+install-llvm-builder:
+	cargo install --path crates/llvm-builder
+
+install-llvm: install-llvm-builder
+	revive-llvm clone
+	revive-llvm build
+
 test-wasm: install-wasm
 	npm run test:wasm

-# install-revive: Build and install to the directory specified in REVIVE_INSTALL_DIR
-ifeq ($(origin REVIVE_INSTALL_DIR), undefined)
-REVIVE_INSTALL_DIR=`pwd`/release/revive-debian
-endif
-install-revive:
-	cargo install --path crates/solidity --root $(REVIVE_INSTALL_DIR)
-
 format:
 	cargo fmt --all --check

@@ -53,11 +53,15 @@ test-solidity: install
 	cargo test --package revive-solidity

 test-workspace: install
-	cargo test --workspace
+	cargo test --workspace --exclude revive-llvm-builder

 test-cli: install
 	npm run test:cli

+test-llvm-builder:
+	@echo "warning: the llvm-builder tests will take many hours"
+	cargo test --package revive-llvm-builder -- --test-threads=1
+
 bench-pvm: install-bin
 	cargo criterion --bench execute --features bench-pvm-interpreter --message-format=json \
 	| criterion-table > crates/benchmarks/PVM.md
@@ -72,9 +76,11 @@ bench: install-bin

 clean:
 	cargo clean ; \
+	revive-llvm clean ; \
 	rm -rf node_modules ; \
 	rm -rf crates/solidity/src/tests/cli-tests/artifacts ; \
 	cargo uninstall revive-solidity ; \
+	cargo uninstall revive-llvm-builder ; \
 	rm -f package-lock.json ; \
 	rm -rf js/dist ; \
 	rm -f js/src/resolc.{wasm,js}
@@ -21,34 +21,40 @@ Building from source requires a compatible LLVM build.

 ### LLVM

-`revive` requires a build of LLVM 18.1.4 or later with the RISC-V _embedded_ target, including `compiler-rt`. Use the provided [build-llvm.sh](build-llvm.sh) build script to compile a compatible LLVM build locally in `$PWD/llvm18.0` (don't forget to add that to `$PATH` afterwards).
+`revive` requires a build of LLVM v18.1.8 with the RISC-V _embedded_ target, including `compiler-rt`. Use the provided [revive-llvm](crates/llvm-builder/README.md) utility to compile a compatible LLVM build locally and point `$LLVM_SYS_181_PREFIX` to the installation directory afterwards.

 ### The `resolc` Solidity frontend

 To install the `resolc` Solidity frontend executable:

 ```bash
-bash build-llvm.sh
-export PATH=${PWD}/llvm18.0/bin:$PATH
+# Build the host LLVM dependency with PolkaVM target support
+make install-llvm
+export LLVM_SYS_181_PREFIX=${PWD}/target-llvm/gnu/target-final
+
+# Build the resolc frontend executable
 make install-bin
 resolc --version
 ```
+
 ### Cross-compilation to WASM

-Cross-compiles the Revive compiler to WASM for running it in a Node.js or browser environment.
-
-Install [emscripten](https://emscripten.org/docs/getting_started/downloads.html). Tested on version 3.1.64.
-To build resolc.js execute:
+Cross-compile resolc.js frontend executable to Wasm for running it in a Node.js or browser environment. The `REVIVE_LLVM_TARGET_PREFIX` environment variable is used to control the target environment LLVM dependency.

 ```bash
-bash build-llvm.sh
-export PATH=${PWD}/llvm18.0/bin:$PATH
-export EMSDK_ROOT=<PATH_TO_EMSCRIPTEN_SDK>
-bash emscripten-build-llvm.sh
-source $EMSDK_ROOT/emsdk_env.sh
-export LLVM_LINK_PREFIX=${PWD}/llvm18.0-emscripten
-export PATH=$PATH:$PWD/llvm18.0-emscripten/bin/
+# Build the host LLVM dependency with PolkaVM target support
+make install-llvm
+export LLVM_SYS_181_PREFIX=${PWD}/target-llvm/gnu/target-final
+
+# Build the target LLVM dependency with PolkaVM target support
+revive-llvm --target-env emscripten clone
+source emsdk/emsdk_env.sh
+revive-llvm --target-env emscripten build
+export REVIVE_LLVM_TARGET_PREFIX=${PWD}/target-llvm/emscripten/target-final
+
+# Build the resolc frontend executable
 make install-wasm
+make test-wasm
 ```

 ### Development
@@ -0,0 +1 @@
+https://github.com/paritytech/polkadot-sdk/blob/master/docs/contributor/SECURITY.md
@@ -1,88 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-INSTALL_DIR="${PWD}/llvm18.0"
-mkdir -p ${INSTALL_DIR}
-
-# Build LLVM, clang
-LLVM_SRC_PREFIX=${PWD}/llvm-project
-LLVM_SRC_DIR=${LLVM_SRC_PREFIX}/llvm
-LLVM_BUILD_DIR=${PWD}/build/llvm
-
-./clone-llvm.sh "${LLVM_SRC_PREFIX}"
-
-if [ ! -d ${LLVM_BUILD_DIR} ] ; then
-	mkdir -p ${LLVM_BUILD_DIR}
-fi
-
-cmake -G Ninja \
-  -S ${LLVM_SRC_DIR} \
-  -B ${LLVM_BUILD_DIR} \
-  -DLLVM_ENABLE_ASSERTIONS=On \
-  -DLLVM_ENABLE_TERMINFO=Off \
-  -DLLVM_ENABLE_LIBXML2=Off \
-  -DLLVM_ENABLE_ZLIB=Off \
-  -DLLVM_ENABLE_PROJECTS='clang;lld' \
-  -DLLVM_TARGETS_TO_BUILD='RISCV' \
-  -DLLVM_ENABLE_ZSTD=Off \
-  -DCMAKE_BUILD_TYPE=MinSizeRel \
-  -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR}
-
-cmake --build ${LLVM_BUILD_DIR}
-cmake --install ${LLVM_BUILD_DIR}
-
-# Build compiler builtins
-COMPILER_RT_SRC_DIR=${LLVM_SRC_PREFIX}/compiler-rt
-COMPILER_RT_BUILD_DIR=${PWD}/build/compiler-rt
-if [ ! -d ${COMPILER_RT_BUILD_DIR} ] ; then
-	mkdir -p ${COMPILER_RT_BUILD_DIR}
-fi
-
-build_compiler_rt() {
-	case "$1" in
-		64) TARGET_ABI=lp64e ;;
-		32) TARGET_ABI=ilp32e ;;
-		*) exit -1
-	esac
-	CFLAGS="--target=riscv${1} -march=rv${1}em -mabi=${TARGET_ABI} -mcpu=generic-rv${1} -nostdlib -nodefaultlibs"
-
-	cmake -G Ninja \
-	  -S ${COMPILER_RT_SRC_DIR} \
-	  -B ${COMPILER_RT_BUILD_DIR} \
-	  -DCMAKE_BUILD_TYPE=Release \
-	  -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} \
-	  -DCOMPILER_RT_BUILD_BUILTINS=ON \
-	  -DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
-	  -DCOMPILER_RT_BUILD_MEMPROF=OFF \
-	  -DCOMPILER_RT_BUILD_PROFILE=OFF \
-	  -DCOMPILER_RT_BUILD_SANITIZERS=OFF \
-	  -DCOMPILER_RT_BUILD_XRAY=OFF \
-	  -DCMAKE_C_COMPILER=${INSTALL_DIR}/bin/clang \
-	  -DCMAKE_C_COMPILER_TARGET=riscv${1} \
-	  -DCMAKE_ASM_COMPILER_TARGET=riscv${1} \
-	  -DCMAKE_CXX_COMPILER_TARGET=riscv${1} \
-	  -DCMAKE_C_TARGET_BITS=riscv${1} \
-	  -DCMAKE_ASM_TARGET_BITS=riscv${1} \
-	  -DCMAKE_AR=${INSTALL_DIR}/bin/llvm-ar \
-	  -DCMAKE_NM=${INSTALL_DIR}/bin/llvm-nm \
-	  -DCMAKE_RANLIB=${INSTALL_DIR}/bin/llvm-ranlib \
-	  -DCOMPILER_RT_BAREMETAL_BUILD=ON \
-	  -DLLVM_CONFIG_PATH=${INSTALL_DIR}/bin/llvm-config \
-	  -DCMAKE_C_FLAGS="${CFLAGS}" \
-	  -DCMAKE_ASM_FLAGS="${CFLAGS}" \
-	  -DCOMPILER_RT_TEST_COMPILER=${INSTALL_DIR}/bin/clang \
-	  -DCMAKE_CXX_FLAGS="${CFLAGS}" \
-	  -DCMAKE_SYSTEM_NAME=unknown \
-	  -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON 
-	
-	cmake --build ${COMPILER_RT_BUILD_DIR}
-	cmake --install ${COMPILER_RT_BUILD_DIR} 
-}
-
-build_compiler_rt 32
-build_compiler_rt 64
-
-echo ""
-echo "success"
-echo "add this directory to your PATH: ${INSTALL_DIR}/bin/"
@@ -0,0 +1,14 @@
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# IDE
+/.idea/
+/.vscode/
@@ -0,0 +1,15 @@
+[package]
+name = "revive-build-utils"
+version.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+authors = [
+    "Cyrill Leutwiler <cyrill@parity.io>",
+]
+description = "Shared build utilities of the revive compiler"
+
+[lib]
+doctest = false
+
+[dependencies]
@@ -0,0 +1,10 @@
+# revive: Compiler Common
+
+## License
+
+This library is distributed under the terms of either
+
+- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
+
+at your option.
@@ -0,0 +1,48 @@
+//! The compiler build utilities library.
+
+/// The revive LLVM host dependency directory prefix environment variable.
+pub const REVIVE_LLVM_HOST_PREFIX: &str = "LLVM_SYS_181_PREFIX";
+
+/// The revive LLVM target dependency directory prefix environment variable.
+pub const REVIVE_LLVM_TARGET_PREFIX: &str = "REVIVE_LLVM_TARGET_PREFIX";
+
+/// Constructs a path to the LLVM tool `name`.
+///
+/// Respects the [`REVIVE_LLVM_HOST_PREFIX`] environment variable.
+pub fn llvm_host_tool(name: &str) -> std::path::PathBuf {
+    std::env::var_os(REVIVE_LLVM_HOST_PREFIX)
+        .map(Into::<std::path::PathBuf>::into)
+        .unwrap_or_else(|| {
+            panic!(
+                "install LLVM using the revive-llvm builder and export {REVIVE_LLVM_HOST_PREFIX}",
+            )
+        })
+        .join("bin")
+        .join(name)
+}
+
+/// Returns the LLVM lib dir.
+///
+/// Respects the [`REVIVE_LLVM_HOST_PREFIX`] environment variable.
+pub fn llvm_lib_dir() -> std::path::PathBuf {
+    std::path::PathBuf::from(llvm_config("--libdir").trim())
+}
+
+/// Returns the LLVM CXX compiler flags.
+///
+/// Respects the [`REVIVE_LLVM_HOST_PREFIX`] environment variable.
+pub fn llvm_cxx_flags() -> String {
+    llvm_config("--cxxflags")
+}
+
+/// Execute the `llvm-config` utility respecting the [`REVIVE_LLVM_HOST_PREFIX`] environment variable.
+fn llvm_config(arg: &str) -> String {
+    let llvm_config = llvm_host_tool("llvm-config");
+    let output = std::process::Command::new(&llvm_config)
+        .arg(arg)
+        .output()
+        .unwrap_or_else(|error| panic!("`{} {arg}` failed: {error}", llvm_config.display()));
+
+    String::from_utf8(output.stdout)
+        .unwrap_or_else(|_| panic!("output of `{} {arg}` should be utf8", llvm_config.display()))
+}
@@ -8,4 +8,5 @@ authors.workspace = true
 build = "build.rs"
 description = "compiler builtins for the revive compiler"

-[dependencies]
+[build-dependencies]
+revive-build-utils = { workspace = true }
@@ -3,25 +3,32 @@ use std::{env, fs, io::Read, path::Path, process::Command};
 pub const BUILTINS_ARCHIVE_FILE: &str = "libclang_rt.builtins-riscv64.a";

 fn main() {
-    let mut llvm_lib_dir = String::new();
+    println!(
+        "cargo:rerun-if-env-changed={}",
+        revive_build_utils::REVIVE_LLVM_HOST_PREFIX
+    );

-    Command::new("llvm-config")
-        .args(["--libdir"])
+    let llvm_config = revive_build_utils::llvm_host_tool("llvm-config");
+    let mut llvm_lib_dir = String::new();
+    Command::new(&llvm_config)
+        .arg("--libdir")
        .output()
-        .expect("llvm-config should be able to provide LD path")
+        .unwrap_or_else(|_| {
+            panic!(
+                "{} should be able to provide LD path",
+                llvm_config.display()
+            )
+        })
        .stdout
        .as_slice()
        .read_to_string(&mut llvm_lib_dir)
        .expect("llvm-config output should be utf8");

-    let mut lib_path = std::path::PathBuf::from(llvm_lib_dir.trim())
-        .join("linux")
+    let lib_path = revive_build_utils::llvm_lib_dir()
+        .join("unknown")
        .join(BUILTINS_ARCHIVE_FILE);
-    if !lib_path.exists() {
-        lib_path = std::path::PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap())
-            .join(BUILTINS_ARCHIVE_FILE);
-    }
-    let archive = fs::read(lib_path).expect("clang builtins not found");
+    let archive = fs::read(&lib_path).expect("clang builtins not found");
+    println!("cargo:rerun-if-env-changed={}", lib_path.display());

    let out_dir = env::var_os("OUT_DIR").expect("has OUT_DIR");
    let archive_path = Path::new(&out_dir).join(BUILTINS_ARCHIVE_FILE);
@@ -13,3 +13,4 @@ libc = { workspace = true }

 [build-dependencies]
 cc = { workspace = true }
+revive-build-utils = { workspace = true }
@@ -1,34 +1,16 @@
-use std::{
-    env,
-    path::{Path, PathBuf},
-};
+fn set_rustc_link_flags() {
+    let llvm_lib_path = match std::env::var(revive_build_utils::REVIVE_LLVM_TARGET_PREFIX) {
+        Ok(path) => std::path::PathBuf::from(path).join("lib"),
+        _ => revive_build_utils::llvm_lib_dir(),
+    };

-const LLVM_LINK_PREFIX: &str = "LLVM_LINK_PREFIX";
-
-fn locate_llvm_config() -> PathBuf {
-    let prefix = env::var_os(LLVM_LINK_PREFIX)
-        .map(|p| PathBuf::from(p).join("bin"))
-        .unwrap_or_default();
-    prefix.join("llvm-config")
-}
-
-fn llvm_config(llvm_config_path: &Path, arg: &str) -> String {
-    let output = std::process::Command::new(llvm_config_path)
-        .args([arg])
-        .output()
-        .unwrap_or_else(|_| panic!("`llvm-config {arg}` failed"));
-
-    String::from_utf8(output.stdout)
-        .unwrap_or_else(|_| panic!("output of `llvm-config {arg}` should be utf8"))
-}
-
-fn set_rustc_link_flags(llvm_config_path: &Path) {
    println!(
        "cargo:rustc-link-search=native={}",
-        llvm_config(llvm_config_path, "--libdir")
+        llvm_lib_path.to_string_lossy()
    );

    for lib in [
+        // These are required by ld.lld
        "lldELF",
        "lldCommon",
        "lldMachO",
@@ -91,18 +73,27 @@ fn set_rustc_link_flags(llvm_config_path: &Path) {
    }

    let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
+    let target_env = std::env::var("CARGO_CFG_TARGET_ENV").unwrap_or_default();
    if target_os == "linux" {
-        println!("cargo:rustc-link-lib=dylib=stdc++");
-        println!("cargo:rustc-link-lib=tinfo");
+        if target_env == "musl" {
+            println!("cargo:rustc-link-lib=static=c++");
+        } else {
+            println!("cargo:rustc-link-lib=dylib=stdc++");
+        }
    }
 }

 fn main() {
-    println!("cargo:rerun-if-env-changed={}", LLVM_LINK_PREFIX);
+    println!(
+        "cargo:rerun-if-env-changed={}",
+        revive_build_utils::REVIVE_LLVM_HOST_PREFIX
+    );
+    println!(
+        "cargo:rerun-if-env-changed={}",
+        revive_build_utils::REVIVE_LLVM_TARGET_PREFIX
+    );

-    let llvm_config_path = locate_llvm_config();
-
-    llvm_config(&llvm_config_path, "--cxxflags")
+    revive_build_utils::llvm_cxx_flags()
        .split_whitespace()
        .fold(&mut cc::Build::new(), |builder, flag| builder.flag(flag))
        .flag("-Wno-unused-parameter")
@@ -110,7 +101,7 @@ fn main() {
        .file("src/linker.cpp")
        .compile("liblinker.a");

-    set_rustc_link_flags(&llvm_config_path);
+    set_rustc_link_flags();

    println!("cargo:rerun-if-changed=build.rs");
 }
@@ -0,0 +1,40 @@
+[package]
+name = "revive-llvm-builder"
+description = "revive LLVM compiler framework builder"
+authors = [
+    "Oleksandr Zarudnyi <a.zarudnyy@matterlabs.dev>",
+    "Anton Baliasnikov <aba@matterlabs.dev>",
+    "Cyrill Leutwiler <cyrill@parity.io>",
+]
+version.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+
+[[bin]]
+name = "revive-llvm"
+path = "src/revive_llvm/main.rs"
+
+[lib]
+doctest = false
+
+[dependencies]
+clap = { workspace = true, features = ["std", "derive"] }
+anyhow = { workspace = true }
+serde = { workspace = true, features = [ "derive" ] }
+toml = { workspace = true }
+num_cpus = { workspace = true }
+fs_extra = { workspace = true }
+path-slash = { workspace = true }
+regex = { workspace = true }
+downloader = { workspace = true }
+tar = { workspace = true }
+flate2 = { workspace = true }
+http = { workspace = true }
+env_logger = { workspace = true }
+log = { workspace = true }
+once_cell = { workspace = true }
+
+[dev-dependencies]
+assert_cmd = { workspace = true }
+assert_fs = { workspace = true }
@@ -0,0 +1,132 @@
+# revive LLVM builder
+
+Parity fork of the [Matter Labs zksync LLVM builder](https://github.com/matter-labs/era-compiler-llvm-builder) helper utility for compiling [revive](https://github.com/paritytech/revive) compatible LLVM builds.
+
+## Installation and usage
+
+The LLVM compiler framework for revive must be built with our tool called `revive-llvm`.
+This is because the revive compiler has requirements not fullfilled in upstream builds:
+- Special builds for compiling the frontend into statically linked ELF binaries and also Wasm executables
+- The RISC-V target (the PolkaVM target)
+- The compiler-rt builtins for the PolkaVM target
+- We want to leave the assertions always on
+- Various other specific configurations and optimization may be applied
+
+Obtain a compatible build for your host platform from the release section of this repository (TODO). Alternatively follow below steps to get a custom build:
+
+<details>
+<summary>1. Install the system prerequisites.</summary>
+
+   * Linux (Debian):
+
+      Install the following packages:
+      ```shell
+      apt install cmake ninja-build curl git libssl-dev pkg-config clang lld
+      ```
+   * Linux (Arch):
+
+      Install the following packages:
+      ```shell
+      pacman -Syu which cmake ninja curl git pkg-config clang lld
+      ```
+
+   * MacOS:
+
+      * Install the [HomeBrew](https://brew.sh) package manager.
+      * Install the following packages:
+
+         ```shell
+         brew install cmake ninja coreutils
+         ```
+
+      * Install your choice of a recent LLVM/[Clang](https://clang.llvm.org) compiler, e.g. via [Xcode](https://developer.apple.com/xcode/), [Apple’s Command Line Tools](https://developer.apple.com/library/archive/technotes/tn2339/_index.html), or your preferred package manager.
+</details>
+
+<details>
+<summary>2. Install Rust.</summary>
+
+   * Follow the latest [official instructions](https://www.rust-lang.org/tools/install:
+      ```shell
+      curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+      . ${HOME}/.cargo/env
+      ```
+
+      > Currently we are not pinned to any specific version of Rust, so just install the latest stable build for your   platform.
+</details>
+
+<details>
+<summary>3. Install the revive LLVM framework builder.</summary>
+
+   * Install the builder using `cargo`:
+      ```shell
+      cargo install --git https://github.com/paritytech/revive-llvm-builder --force --locked
+      ```
+
+      > The builder is not the LLVM framework itself, but a tool that clones its repository and runs a sequence of build commands. By default it is installed in `~/.cargo/bin/`, which is recommended to be added to your `$PATH`.
+
+</details>
+
+<details>
+<summary>4. (Optional) Create the `LLVM.lock` file.</summary>
+
+   * The `LLVM.lock` dictates the LLVM source tree being used.
+     A default `./LLVM.lock` pointing to the release used for development is already provided.
+
+</details>
+
+<details>
+<summary>5. Build LLVM.</summary>
+
+   * Clone and build the LLVM framework using the `revive-llvm` tool.
+
+     The clang and lld projects are required for the `resolc` Solidity frontend executable; they are enabled by default. LLVM assertions are also enabled by default.
+
+      ```shell
+      revive-llvm clone
+      revive-llvm build
+      ```
+
+      Build artifacts end up in the `./target-llvm/gnu/target-final/` directory by default.
+      The `gnu` directory depends on the supported archticture and will either be `gnu`, `musl` or `emscripten`.
+      You now need to export the final target directory `$LLVM_SYS_181_PREFIX`: `export LLVM_SYS_181_PREFIX=${PWD}/target-llvm/gnu/target-final`
+      If built with the `--enable-tests` option, test tools will be in the `./target-llvm/gnu/build-final/` directory, along with copies of the build artifacts. For all supported build options, run `revive-llvm build --help`.
+
+</details>
+
+## Supported target architectures
+
+The following target platforms are supported:
+- Linux GNU (x86)
+- Linux MUSL (x86)
+- MacOS (aarch64)
+- Windows GNU (x86)
+- Emscripten (wasm32)
+
+<details>
+<summary>Building for MUSL</summary>
+
+   * Via a musl build we can build revive into fully static ELF binaries.
+     Which is desirable for reproducible Solidity contracts builds.
+     The resulting binary is also very portable, akin to the`solc` frontend binary distribution.
+
+     Clone and build the LLVM framework using the `revive-llvm` tool:
+      ```shell
+      revive-llvm --target-env musl clone
+      revive-llvm --target-env musl build --enable-assertions --llvm-projects clang --llvm-projects lld 
+      ```
+
+</details>
+
+<details>
+<summary>Building for Emscripten</summary>
+
+   * Via an emsdk build we can run revive in the browser and on node.js.
+
+     Clone and build the LLVM framework using the `revive-llvm` tool:
+      ```shell
+      revive-llvm --target-env emscripten clone
+      revive-llvm --target-env emscripten build --enable-assertions --llvm-projects clang --llvm-projects lld 
+      ```
+
+</details>
+
@@ -0,0 +1,39 @@
+//! The revive LLVM build type.
+
+/// The revive LLVM build type.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum BuildType {
+    /// The debug build.
+    Debug,
+    /// The release build.
+    Release,
+    /// The release with debug info build.
+    RelWithDebInfo,
+    /// The minimal size release build.
+    MinSizeRel,
+}
+
+impl std::str::FromStr for BuildType {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value {
+            "Debug" => Ok(Self::Debug),
+            "Release" => Ok(Self::Release),
+            "RelWithDebInfo" => Ok(Self::RelWithDebInfo),
+            "MinSizeRel" => Ok(Self::MinSizeRel),
+            value => Err(format!("Unsupported build type: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for BuildType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Debug => write!(f, "Debug"),
+            Self::Release => write!(f, "Release"),
+            Self::RelWithDebInfo => write!(f, "RelWithDebInfo"),
+            Self::MinSizeRel => write!(f, "MinSizeRel"),
+        }
+    }
+}
@@ -0,0 +1,137 @@
+//! Utilities for compiling the LLVM compiler-rt builtins.
+
+/// Static CFLAGS variable passed to the compiler building the compiler-rt builtins.
+const C_FLAGS: [&str; 6] = [
+    "--target=riscv64",
+    "-march=rv64emac",
+    "-mabi=lp64e",
+    "-mcpu=generic-rv64",
+    "-nostdlib",
+    "-nodefaultlibs",
+];
+
+/// Static CMAKE arguments for building the compiler-rt builtins.
+const CMAKE_STATIC_ARGS: [&str; 14] = [
+    "-DCOMPILER_RT_BUILD_BUILTINS='On'",
+    "-DCOMPILER_RT_BUILD_LIBFUZZER='Off'",
+    "-DCOMPILER_RT_BUILD_MEMPROF='Off'",
+    "-DCOMPILER_RT_BUILD_PROFILE='Off'",
+    "-DCOMPILER_RT_BUILD_SANITIZERS='Off'",
+    "-DCOMPILER_RT_BUILD_XRAY='Off'",
+    "-DCOMPILER_RT_DEFAULT_TARGET_ONLY='On'",
+    "-DCOMPILER_RT_BAREMETAL_BUILD='On'",
+    "-DCMAKE_BUILD_WITH_INSTALL_RPATH=1",
+    "-DCMAKE_EXPORT_COMPILE_COMMANDS='On'",
+    "-DCMAKE_SYSTEM_NAME='unknown'",
+    "-DCMAKE_C_COMPILER_TARGET='riscv64'",
+    "-DCMAKE_ASM_COMPILER_TARGET='riscv64'",
+    "-DCMAKE_CXX_COMPILER_TARGET='riscv64'",
+];
+
+/// Dynamic cmake arguments for building the compiler-rt builtins.
+fn cmake_dynamic_args(
+    build_type: crate::BuildType,
+    target_env: crate::target_env::TargetEnv,
+) -> anyhow::Result<[String; 13]> {
+    let llvm_compiler_rt_target = crate::LLVMPath::llvm_target_compiler_rt()?;
+
+    // The Emscripten target needs to use the host LLVM tools.
+    let llvm_target_host = if target_env == crate::target_env::TargetEnv::Emscripten {
+        crate::LLVMPath::llvm_build_host()?
+    } else {
+        crate::LLVMPath::llvm_target_final()?
+    };
+
+    let mut clang_path = llvm_target_host.to_path_buf();
+    clang_path.push("bin/clang");
+
+    let mut clangxx_path = llvm_target_host.to_path_buf();
+    clangxx_path.push("bin/clang++");
+
+    let mut llvm_config_path = llvm_target_host.to_path_buf();
+    llvm_config_path.push("bin/llvm-config");
+
+    let mut ar_path = llvm_target_host.to_path_buf();
+    ar_path.push("bin/llvm-ar");
+
+    let mut nm_path = llvm_target_host.to_path_buf();
+    nm_path.push("bin/llvm-nm");
+
+    let mut ranlib_path = llvm_target_host.to_path_buf();
+    ranlib_path.push("bin/llvm-ranlib");
+
+    let mut linker_path = llvm_target_host.to_path_buf();
+    linker_path.push("bin/ld.lld");
+
+    Ok([
+        format!(
+            "-DCMAKE_INSTALL_PREFIX='{}'",
+            llvm_compiler_rt_target.to_string_lossy().as_ref(),
+        ),
+        format!("-DCMAKE_BUILD_TYPE='{build_type}'"),
+        format!(
+            "-DCOMPILER_RT_TEST_COMPILER='{}'",
+            clang_path.to_string_lossy()
+        ),
+        format!("-DCMAKE_C_FLAGS='{}'", C_FLAGS.join(" ")),
+        format!("-DCMAKE_ASM_FLAGS='{}'", C_FLAGS.join(" ")),
+        format!("-DCMAKE_CXX_FLAGS='{}'", C_FLAGS.join(" ")),
+        format!("-DCMAKE_C_COMPILER='{}'", clang_path.to_string_lossy()),
+        format!("-DCMAKE_ASM_COMPILER='{}'", clang_path.to_string_lossy()),
+        format!("-DCMAKE_CXX_COMPILER='{}'", clangxx_path.to_string_lossy()),
+        format!("-DCMAKE_AR='{}'", ar_path.to_string_lossy()),
+        format!("-DCMAKE_NM='{}'", nm_path.to_string_lossy()),
+        format!("-DCMAKE_RANLIB='{}'", ranlib_path.to_string_lossy()),
+        format!(
+            "-DLLVM_CONFIG_PATH='{}'",
+            llvm_config_path.to_string_lossy()
+        ),
+    ])
+}
+
+/// Build the compiler-rt builtins library.
+pub fn build(
+    build_type: crate::BuildType,
+    target_env: crate::target_env::TargetEnv,
+    default_target: Option<crate::TargetTriple>,
+    extra_args: &[String],
+    ccache_variant: Option<crate::ccache_variant::CcacheVariant>,
+    sanitizer: Option<crate::sanitizer::Sanitizer>,
+) -> anyhow::Result<()> {
+    log::info!("building compiler-rt for rv64emac");
+
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_compiler_rt = crate::LLVMPath::llvm_module_compiler_rt()?;
+    let llvm_compiler_rt_build = crate::LLVMPath::llvm_build_compiler_rt()?;
+
+    crate::utils::command(
+        std::process::Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_compiler_rt.to_string_lossy().as_ref(),
+                "-B",
+                llvm_compiler_rt_build.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+            ])
+            .args(CMAKE_STATIC_ARGS)
+            .args(cmake_dynamic_args(build_type, target_env)?)
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            )),
+        "LLVM compiler-rt building cmake",
+    )?;
+
+    crate::utils::ninja(&llvm_compiler_rt_build)?;
+
+    Ok(())
+}
@@ -0,0 +1,31 @@
+//! Compiler cache variants.
+
+/// The list compiler cache variants to be used as constants.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum CcacheVariant {
+    /// Standard ccache.
+    Ccache,
+    /// Mozilla's sccache.
+    Sccache,
+}
+
+impl std::str::FromStr for CcacheVariant {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value {
+            "ccache" => Ok(Self::Ccache),
+            "sccache" => Ok(Self::Sccache),
+            value => Err(format!("Unsupported ccache variant: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for CcacheVariant {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::Ccache => write!(f, "ccache"),
+            Self::Sccache => write!(f, "sccache"),
+        }
+    }
+}
@@ -0,0 +1,340 @@
+//! The revive LLVM builder library.
+
+pub mod build_type;
+pub mod builtins;
+pub mod ccache_variant;
+pub mod llvm_path;
+pub mod llvm_project;
+pub mod lock;
+pub mod platforms;
+pub mod sanitizer;
+pub mod target_env;
+pub mod target_triple;
+pub mod utils;
+
+pub use self::build_type::BuildType;
+pub use self::llvm_path::LLVMPath;
+pub use self::lock::Lock;
+pub use self::platforms::Platform;
+
+use std::collections::HashSet;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+pub use target_env::TargetEnv;
+pub use target_triple::TargetTriple;
+
+/// Executes the LLVM repository cloning.
+pub fn clone(lock: Lock, deep: bool, target_env: TargetEnv) -> anyhow::Result<()> {
+    utils::check_presence("git")?;
+
+    if target_env == TargetEnv::Emscripten {
+        utils::install_emsdk()?;
+    }
+
+    let destination_path = PathBuf::from(LLVMPath::DIRECTORY_LLVM_SOURCE);
+    if destination_path.exists() {
+        log::warn!(
+            "LLVM repository directory {} already exists, falling back to checkout",
+            destination_path.display()
+        );
+        return checkout(lock, false);
+    }
+
+    let mut clone_args = vec!["clone", "--branch", lock.branch.as_str()];
+    if !deep {
+        clone_args.push("--depth");
+        clone_args.push("1");
+    }
+
+    utils::command(
+        Command::new("git")
+            .args(clone_args)
+            .arg(lock.url.as_str())
+            .arg(destination_path.to_string_lossy().as_ref()),
+        "LLVM repository cloning",
+    )?;
+
+    if let Some(r#ref) = lock.r#ref {
+        utils::command(
+            Command::new("git")
+                .args(["checkout", r#ref.as_str()])
+                .current_dir(destination_path.to_string_lossy().as_ref()),
+            "LLVM repository commit checking out",
+        )?;
+    }
+
+    Ok(())
+}
+
+/// Executes the checkout of the specified branch.
+pub fn checkout(lock: Lock, force: bool) -> anyhow::Result<()> {
+    let destination_path = PathBuf::from(LLVMPath::DIRECTORY_LLVM_SOURCE);
+
+    utils::command(
+        Command::new("git")
+            .current_dir(destination_path.as_path())
+            .args(["fetch", "--all", "--tags"]),
+        "LLVM repository data fetching",
+    )?;
+
+    if force {
+        utils::command(
+            Command::new("git")
+                .current_dir(destination_path.as_path())
+                .args(["clean", "-d", "-x", "--force"]),
+            "LLVM repository cleaning",
+        )?;
+    }
+
+    utils::command(
+        Command::new("git")
+            .current_dir(destination_path.as_path())
+            .args(["checkout", "--force", lock.branch.as_str()]),
+        "LLVM repository data pulling",
+    )?;
+
+    if let Some(r#ref) = lock.r#ref {
+        let mut checkout_command = Command::new("git");
+        checkout_command.current_dir(destination_path.as_path());
+        checkout_command.arg("checkout");
+        if force {
+            checkout_command.arg("--force");
+        }
+        checkout_command.arg(r#ref);
+        utils::command(&mut checkout_command, "LLVM repository checking out")?;
+    }
+
+    Ok(())
+}
+
+/// Executes the building of the LLVM framework for the platform determined by the cfg macro.
+/// Since cfg is evaluated at compile time, overriding the platform with a command-line
+/// argument is not possible. So for cross-platform testing, comment out all but the
+/// line to be tested, and perhaps also checks in the platform-specific build method.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    target_env: TargetEnv,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<llvm_project::LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<ccache_variant::CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<sanitizer::Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    log::trace!("build type: {:?}", build_type);
+    log::trace!("target env: {:?}", target_env);
+    log::trace!("targets: {:?}", targets);
+    log::trace!("llvm projects: {:?}", llvm_projects);
+    log::trace!("enable rtti: {:?}", enable_rtti);
+    log::trace!("default target: {:?}", default_target);
+    log::trace!("eneable tests: {:?}", enable_tests);
+    log::trace!("enable_coverage: {:?}", enable_coverage);
+    log::trace!("extra args: {:?}", extra_args);
+    log::trace!("sanitzer: {:?}", sanitizer);
+    log::trace!("enable valgrind: {:?}", enable_valgrind);
+
+    if !PathBuf::from(LLVMPath::DIRECTORY_LLVM_SOURCE).exists() {
+        log::error!(
+            "LLVM project source directory {} does not exist (run `revive-llvm --target-env {} clone`)",
+            LLVMPath::DIRECTORY_LLVM_SOURCE,
+            target_env
+        )
+    }
+
+    std::fs::create_dir_all(llvm_path::DIRECTORY_LLVM_TARGET.get().unwrap())?;
+
+    if cfg!(target_arch = "x86_64") {
+        if cfg!(target_os = "linux") {
+            if target_env == TargetEnv::MUSL {
+                platforms::x86_64_linux_musl::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else if target_env == TargetEnv::GNU {
+                platforms::x86_64_linux_gnu::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else if target_env == TargetEnv::Emscripten {
+                platforms::wasm32_emscripten::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else {
+                anyhow::bail!("Unsupported target environment for x86_64 and Linux");
+            }
+        } else if cfg!(target_os = "macos") {
+            platforms::x86_64_macos::build(
+                build_type,
+                targets,
+                llvm_projects,
+                enable_rtti,
+                default_target,
+                enable_tests,
+                enable_coverage,
+                extra_args,
+                ccache_variant,
+                enable_assertions,
+                sanitizer,
+            )?;
+        } else if cfg!(target_os = "windows") {
+            platforms::x86_64_windows_gnu::build(
+                build_type,
+                targets,
+                llvm_projects,
+                enable_rtti,
+                default_target,
+                enable_tests,
+                enable_coverage,
+                extra_args,
+                ccache_variant,
+                enable_assertions,
+                sanitizer,
+            )?;
+        } else {
+            anyhow::bail!("Unsupported target OS for x86_64");
+        }
+    } else if cfg!(target_arch = "aarch64") {
+        if cfg!(target_os = "linux") {
+            if target_env == TargetEnv::MUSL {
+                platforms::aarch64_linux_musl::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else if target_env == TargetEnv::GNU {
+                platforms::aarch64_linux_gnu::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else {
+                anyhow::bail!("Unsupported target environment for aarch64 and Linux");
+            }
+        } else if cfg!(target_os = "macos") {
+            if target_env == TargetEnv::Emscripten {
+                platforms::wasm32_emscripten::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                    enable_valgrind,
+                )?;
+            } else {
+                platforms::aarch64_macos::build(
+                    build_type,
+                    targets,
+                    llvm_projects,
+                    enable_rtti,
+                    default_target,
+                    enable_tests,
+                    enable_coverage,
+                    extra_args,
+                    ccache_variant,
+                    enable_assertions,
+                    sanitizer,
+                )?;
+            }
+        } else {
+            anyhow::bail!("Unsupported target OS for aarch64");
+        }
+    } else {
+        anyhow::bail!("Unsupported target architecture");
+    }
+
+    crate::builtins::build(
+        build_type,
+        target_env,
+        default_target,
+        extra_args,
+        ccache_variant,
+        sanitizer,
+    )?;
+
+    Ok(())
+}
+
+/// Executes the build artifacts cleaning.
+pub fn clean() -> anyhow::Result<()> {
+    let remove_if_exists = |path: &Path| {
+        if !path.exists() {
+            return Ok(());
+        }
+        log::info!("deleting {}", path.display());
+        std::fs::remove_dir_all(path)
+    };
+
+    remove_if_exists(
+        llvm_path::DIRECTORY_LLVM_TARGET
+            .get()
+            .expect("target_env is always set because of the default value")
+            .parent()
+            .expect("target_env parent directory is target-llvm"),
+    )?;
+    remove_if_exists(&PathBuf::from(LLVMPath::DIRECTORY_EMSDK_SOURCE))?;
+    remove_if_exists(&PathBuf::from(LLVMPath::DIRECTORY_LLVM_SOURCE))?;
+    remove_if_exists(&PathBuf::from(LLVMPath::DIRECTORY_LLVM_HOST_SOURCE))?;
+
+    Ok(())
+}
@@ -0,0 +1,151 @@
+//! The revive LLVM builder constants.
+
+use std::path::PathBuf;
+use std::sync::OnceLock;
+
+pub static DIRECTORY_LLVM_TARGET: OnceLock<PathBuf> = OnceLock::new();
+
+/// The LLVM path resolver.
+pub struct LLVMPath {}
+
+impl LLVMPath {
+    /// The LLVM source directory.
+    pub const DIRECTORY_LLVM_SOURCE: &'static str = "./llvm/";
+
+    /// The LLVM host source directory for stage 1 of multistage MUSL and Emscripten builds.
+    ///
+    /// We use upstream LLVM anyways; re-use the same tree for host and target builds.
+    pub const DIRECTORY_LLVM_HOST_SOURCE: &'static str = Self::DIRECTORY_LLVM_SOURCE;
+
+    /// The Emscripten SDK source directory.
+    pub const DIRECTORY_EMSDK_SOURCE: &'static str = "./emsdk/";
+
+    /// Returns the path to the `llvm` stage 1 host LLVM source module directory.
+    pub fn llvm_host_module_llvm() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(Self::DIRECTORY_LLVM_HOST_SOURCE);
+        path.push("llvm");
+        crate::utils::absolute_path(path).inspect(|absolute_path| {
+            log::debug!(
+                "llvm stage 1 host llvm source module: {}",
+                absolute_path.display()
+            )
+        })
+    }
+
+    /// Returns the path to the `llvm` LLVM source module directory.
+    pub fn llvm_module_llvm() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(Self::DIRECTORY_LLVM_SOURCE);
+        path.push("llvm");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm source module: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the MUSL source.
+    pub fn musl_source(name: &str) -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push(name);
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("musl source: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the MUSL build directory.
+    pub fn musl_build(source_directory: &str) -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push(source_directory);
+        path.push("build");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("musl build: '{}'", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM CRT build directory.
+    pub fn llvm_build_crt() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("build-crt");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm build crt: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM host build directory.
+    pub fn llvm_build_host() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("build-host");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm build host: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM final build directory.
+    pub fn llvm_build_final() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("build-final");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm build final: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the MUSL target directory.
+    pub fn musl_target() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("target-musl");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("musl target: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM CRT target directory.
+    pub fn llvm_target_crt() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("target-crt");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm crt target: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM host target directory.
+    pub fn llvm_target_host() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("target-host");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm host target: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM final target directory.
+    pub fn llvm_target_final() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("target-final");
+        crate::utils::absolute_path(path)
+            .inspect(|absolute_path| log::debug!("llvm final target: {}", absolute_path.display()))
+    }
+
+    /// Returns the path to the LLVM compiler builtin target directory.
+    pub fn llvm_module_compiler_rt() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(Self::DIRECTORY_LLVM_SOURCE);
+        path.push("compiler-rt");
+        crate::utils::absolute_path(path).inspect(|absolute_path| {
+            log::debug!("compiler-rt source dir: {}", absolute_path.display())
+        })
+    }
+
+    /// Returns the path to the LLVM compiler-rt target directory.
+    pub fn llvm_target_compiler_rt() -> anyhow::Result<PathBuf> {
+        Self::llvm_target_final()
+    }
+
+    /// Returns the path to the LLVM compiler-rt build directory.
+    pub fn llvm_build_compiler_rt() -> anyhow::Result<PathBuf> {
+        let mut path = PathBuf::from(DIRECTORY_LLVM_TARGET.get().unwrap());
+        path.push("build-compiler-rt");
+        crate::utils::absolute_path(path).inspect(|absolute_path| {
+            log::debug!("llvm compiler-rt build: {}", absolute_path.display())
+        })
+    }
+
+    /// Returns the path to the LLVM target final bin path.
+    ///
+    pub fn llvm_target_final_bin(
+        target_env: crate::target_env::TargetEnv,
+    ) -> anyhow::Result<PathBuf> {
+        let mut path = Self::llvm_target_final()?;
+        path.push("bin");
+        path.push(format!("{target_env}"));
+        crate::utils::absolute_path(path).inspect(|absolute_path| {
+            log::debug!("llvm target final bin: {}", absolute_path.display())
+        })
+    }
+}
@@ -0,0 +1,39 @@
+//! The LLVM projects to enable during the build.
+
+/// The list of LLVM projects used as constants.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum LLVMProject {
+    /// The Clang compiler.
+    CLANG,
+    /// LLD, the LLVM linker.
+    LLD,
+    /// The LLVM debugger.
+    LLDB,
+    /// The MLIR compiler.
+    MLIR,
+}
+
+impl std::str::FromStr for LLVMProject {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value.to_lowercase().as_str() {
+            "clang" => Ok(Self::CLANG),
+            "lld" => Ok(Self::LLD),
+            "lldb" => Ok(Self::LLDB),
+            "mlir" => Ok(Self::MLIR),
+            value => Err(format!("Unsupported LLVM project to enable: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for LLVMProject {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::CLANG => write!(f, "clang"),
+            Self::LLD => write!(f, "lld"),
+            Self::LLDB => write!(f, "lldb"),
+            Self::MLIR => write!(f, "mlir"),
+        }
+    }
+}
@@ -0,0 +1,37 @@
+//! The revive LLVM builder lock file.
+
+use anyhow::Context;
+use std::fs::File;
+use std::io::Read;
+use std::path::PathBuf;
+
+use serde::Deserialize;
+use serde::Serialize;
+
+/// The default lock file location.
+pub const LLVM_LOCK_DEFAULT_PATH: &str = "LLVM.lock";
+
+/// The lock file data.
+///
+/// This file describes the exact reference of the LLVM framework.
+#[derive(Debug, Deserialize, Serialize)]
+pub struct Lock {
+    /// The LLVM repository URL.
+    pub url: String,
+    /// The LLVM repository branch.
+    pub branch: String,
+    /// The LLVM repository commit reference.
+    pub r#ref: Option<String>,
+}
+
+impl TryFrom<&PathBuf> for Lock {
+    type Error = anyhow::Error;
+
+    fn try_from(path: &PathBuf) -> Result<Self, Self::Error> {
+        let mut config_str = String::new();
+        let mut config_file =
+            File::open(path).with_context(|| format!("Error opening {:?} file", path))?;
+        config_file.read_to_string(&mut config_str)?;
+        Ok(toml::from_str(&config_str)?)
+    }
+}
@@ -0,0 +1,111 @@
+//! The revive LLVM arm64 `linux-gnu` builder.
+
+use std::collections::HashSet;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    crate::utils::check_presence("lld")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_llvm.to_string_lossy().as_ref(),
+                "-B",
+                llvm_build_final.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    llvm_target_final.to_string_lossy().as_ref(),
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                "-DLLVM_USE_LINKER='lld'",
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::GNU,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_valgrind(
+                enable_valgrind,
+            )),
+        "LLVM building cmake",
+    )?;
+    crate::utils::ninja(llvm_build_final.as_ref())?;
+    Ok(())
+}
@@ -0,0 +1,394 @@
+//! The revive LLVM arm64 `linux-musl` builder.
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+use std::collections::HashSet;
+use std::path::Path;
+use std::process::Command;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    crate::utils::check_presence("lld")?;
+    crate::utils::check_presence("ninja")?;
+
+    let musl_name = "musl-1.2.3";
+    let musl_build = LLVMPath::musl_build(musl_name)?;
+    let musl_target = LLVMPath::musl_target()?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_host_module_llvm = LLVMPath::llvm_host_module_llvm()?;
+
+    let llvm_build_crt = LLVMPath::llvm_build_crt()?;
+    let llvm_target_crt = LLVMPath::llvm_target_crt()?;
+
+    let llvm_build_host = LLVMPath::llvm_build_host()?;
+    let llvm_target_host = LLVMPath::llvm_target_host()?;
+
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    if !LLVMPath::musl_source(musl_name)?.exists() {
+        crate::utils::download_musl(musl_name)?;
+    }
+    crate::platforms::shared::build_musl(musl_build.as_path(), musl_target.as_path())?;
+    build_crt(
+        targets.clone(),
+        llvm_host_module_llvm.as_path(),
+        llvm_build_crt.as_path(),
+        llvm_target_crt.as_path(),
+        ccache_variant,
+    )?;
+    build_host(
+        llvm_host_module_llvm.as_path(),
+        llvm_build_host.as_path(),
+        llvm_target_host.as_path(),
+        musl_target.as_path(),
+        llvm_target_crt.as_path(),
+        ccache_variant,
+    )?;
+    build_target(
+        build_type,
+        targets,
+        llvm_projects,
+        enable_rtti,
+        default_target,
+        llvm_module_llvm.as_path(),
+        llvm_build_final.as_path(),
+        llvm_target_final.as_path(),
+        musl_target.as_path(),
+        llvm_target_host.as_path(),
+        enable_tests,
+        enable_coverage,
+        extra_args,
+        ccache_variant,
+        enable_assertions,
+        sanitizer,
+        enable_valgrind,
+    )?;
+
+    Ok(())
+}
+
+///
+/// The `crt` building sequence.
+///
+fn build_crt(
+    mut targets: HashSet<Platform>,
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    ccache_variant: Option<CcacheVariant>,
+) -> anyhow::Result<()> {
+    targets.insert(Platform::AArch64);
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_BUILD_TYPE='Release'",
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                "-DLLVM_ENABLE_PROJECTS='compiler-rt'",
+                format!("-DLLVM_TARGETS_TO_BUILD='{}'", Platform::AArch64).as_str(),
+                "-DLLVM_DEFAULT_TARGET_TRIPLE='aarch64-unknown-linux-musl'",
+                "-DLLVM_BUILD_TESTS='Off'",
+                "-DLLVM_BUILD_RUNTIMES='Off'",
+                "-DLLVM_BUILD_UTILS='Off'",
+                "-DLLVM_INCLUDE_TESTS='Off'",
+                "-DLLVM_INCLUDE_RUNTIMES='Off'",
+                "-DLLVM_INCLUDE_UTILS='Off'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ARCH='aarch64'",
+                "-DCOMPILER_RT_BUILD_CRT='On'",
+                "-DCOMPILER_RT_BUILD_BUILTINS='On'",
+                "-DCOMPILER_RT_BUILD_SANITIZERS='Off'",
+                "-DCOMPILER_RT_BUILD_XRAY='Off'",
+                "-DCOMPILER_RT_BUILD_LIBFUZZER='Off'",
+                "-DCOMPILER_RT_BUILD_PROFILE='Off'",
+                "-DCOMPILER_RT_BUILD_MEMPROF='Off'",
+                "-DCOMPILER_RT_BUILD_ORC='Off'",
+            ])
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            )),
+        "CRT building cmake",
+    )?;
+
+    crate::utils::command(
+        Command::new("ninja")
+            .arg("-C")
+            .arg(build_directory)
+            .arg("install-crt"),
+        "CRT building ninja",
+    )?;
+
+    Ok(())
+}
+
+///
+/// The host toolchain building sequence.
+///
+fn build_host(
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    musl_target_directory: &Path,
+    crt_target_directory: &Path,
+    ccache_variant: Option<CcacheVariant>,
+) -> anyhow::Result<()> {
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DDEFAULT_SYSROOT='{}'",
+                    musl_target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_BUILD_TYPE='Release'",
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                "-DCLANG_DEFAULT_CXX_STDLIB='libc++'",
+                "-DCLANG_DEFAULT_RTLIB='compiler-rt'",
+                "-DLLVM_DEFAULT_TARGET_TRIPLE='aarch64-unknown-linux-musl'",
+                "-DLLVM_TARGETS_TO_BUILD='AArch64'",
+                "-DLLVM_BUILD_TESTS='Off'",
+                "-DLLVM_BUILD_UTILS='Off'",
+                "-DLLVM_INCLUDE_TESTS='Off'",
+                "-DLLVM_INCLUDE_UTILS='Off'",
+                "-DLLVM_ENABLE_PROJECTS='clang;lld'",
+                "-DLLVM_ENABLE_RUNTIMES='compiler-rt;libcxx;libcxxabi;libunwind'",
+                "-DLIBCXX_CXX_ABI='libcxxabi'",
+                "-DLIBCXX_HAS_MUSL_LIBC='On'",
+                "-DLIBCXX_ENABLE_SHARED='Off'",
+                "-DLIBCXX_ENABLE_STATIC='On'",
+                "-DLIBCXX_ENABLE_STATIC_ABI_LIBRARY='On'",
+                "-DLIBCXXABI_ENABLE_SHARED='Off'",
+                "-DLIBCXXABI_ENABLE_STATIC='On'",
+                "-DLIBCXXABI_ENABLE_STATIC_UNWINDER='On'",
+                "-DLIBCXXABI_USE_LLVM_UNWINDER='On'",
+                "-DLIBCXXABI_USE_COMPILER_RT='On'",
+                "-DLIBUNWIND_ENABLE_STATIC='On'",
+                "-DLIBUNWIND_ENABLE_SHARED='Off'",
+                "-DCOMPILER_RT_BUILD_CRT='On'",
+                "-DCOMPILER_RT_BUILD_SANITIZERS='Off'",
+                "-DCOMPILER_RT_BUILD_XRAY='Off'",
+                "-DCOMPILER_RT_BUILD_LIBFUZZER='Off'",
+                "-DCOMPILER_RT_BUILD_PROFILE='On'",
+                "-DCOMPILER_RT_BUILD_MEMPROF='Off'",
+                "-DCOMPILER_RT_BUILD_ORC='Off'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ARCH='aarch64'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ONLY='On'",
+            ])
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            )),
+        "LLVM host building cmake",
+    )?;
+
+    let mut crt_lib_directory = crt_target_directory.to_path_buf();
+    crt_lib_directory.push("lib/");
+
+    let mut build_lib_directory = build_directory.to_path_buf();
+    build_lib_directory.push("lib/");
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        content_only: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy(crt_lib_directory, build_lib_directory, &copy_options)?;
+
+    crate::utils::command(
+        Command::new("ninja")
+            .arg("-C")
+            .arg(build_directory)
+            .arg("install"),
+        "LLVM host building ninja",
+    )?;
+
+    Ok(())
+}
+
+///
+/// The target toolchain building sequence.
+///
+#[allow(clippy::too_many_arguments)]
+fn build_target(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    musl_target_directory: &Path,
+    host_target_directory: &Path,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    let mut clang_path = host_target_directory.to_path_buf();
+    clang_path.push("bin/clang");
+
+    let mut clang_cxx_path = host_target_directory.to_path_buf();
+    clang_cxx_path.push("bin/clang++");
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                "-DBUILD_SHARED_LIBS='Off'",
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                format!("-DCMAKE_C_COMPILER='{}'", clang_path.to_string_lossy()).as_str(),
+                format!(
+                    "-DCMAKE_CXX_COMPILER='{}'",
+                    clang_cxx_path.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_FIND_LIBRARY_SUFFIXES='.a'",
+                "-DCMAKE_BUILD_WITH_INSTALL_RPATH=1",
+                "-DCMAKE_EXE_LINKER_FLAGS='-fuse-ld=lld -static'",
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::MUSL,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_valgrind(
+                enable_valgrind,
+            )),
+        "LLVM target building cmake",
+    )?;
+
+    crate::utils::ninja(build_directory)?;
+
+    let mut musl_lib_directory = musl_target_directory.to_path_buf();
+    musl_lib_directory.push("lib/");
+
+    let mut host_lib_directory = host_target_directory.to_path_buf();
+    host_lib_directory.push("lib/aarch64-unknown-linux-musl/");
+
+    let mut target_lib_directory = target_directory.to_path_buf();
+    target_lib_directory.push("lib/");
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        content_only: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy(
+        musl_lib_directory,
+        target_lib_directory.as_path(),
+        &copy_options,
+    )?;
+    fs_extra::dir::copy(
+        host_lib_directory,
+        target_lib_directory.as_path(),
+        &copy_options,
+    )?;
+
+    Ok(())
+}
@@ -0,0 +1,105 @@
+//! The revive LLVM arm64 `macos-aarch64` builder.
+
+use std::collections::HashSet;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_llvm.to_string_lossy().as_ref(),
+                "-B",
+                llvm_build_final.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    llvm_target_final.to_string_lossy().as_ref(),
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                "-DCMAKE_OSX_DEPLOYMENT_TARGET='11.0'",
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::GNU,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::macos_build_opts_ignore_dupicate_libs_warnings())
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            )),
+        "LLVM building cmake",
+    )?;
+
+    crate::utils::ninja(llvm_build_final.as_ref())?;
+
+    Ok(())
+}
@@ -0,0 +1,45 @@
+//! The revive LLVM builder platforms.
+
+pub mod aarch64_linux_gnu;
+pub mod aarch64_linux_musl;
+pub mod aarch64_macos;
+pub mod shared;
+pub mod wasm32_emscripten;
+pub mod x86_64_linux_gnu;
+pub mod x86_64_linux_musl;
+pub mod x86_64_macos;
+pub mod x86_64_windows_gnu;
+
+use std::str::FromStr;
+
+/// The list of platforms used as constants.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Platform {
+    /// The native X86 platform.
+    X86,
+    /// The native AArch64 platform.
+    AArch64,
+    /// The PolkaVM RISC-V platform.
+    PolkaVM,
+}
+
+impl FromStr for Platform {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value {
+            "PolkaVM" => Ok(Self::PolkaVM),
+            value => Err(format!("Unsupported platform: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for Platform {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::X86 => write!(f, "X86"),
+            Self::AArch64 => write!(f, "AArch64"),
+            Self::PolkaVM => write!(f, "RISCV"),
+        }
+    }
+}
@@ -0,0 +1,232 @@
+//! The shared options for building various platforms.
+
+use crate::ccache_variant::CcacheVariant;
+use crate::sanitizer::Sanitizer;
+use crate::target_env::TargetEnv;
+use crate::target_triple::TargetTriple;
+use std::path::Path;
+use std::process::Command;
+
+/// The build options shared by all platforms.
+pub const SHARED_BUILD_OPTS: [&str; 19] = [
+    "-DPACKAGE_VENDOR='Parity Technologies'",
+    "-DCMAKE_BUILD_WITH_INSTALL_RPATH=1",
+    "-DLLVM_BUILD_DOCS='Off'",
+    "-DLLVM_INCLUDE_DOCS='Off'",
+    "-DLLVM_INCLUDE_BENCHMARKS='Off'",
+    "-DLLVM_INCLUDE_EXAMPLES='Off'",
+    "-DLLVM_ENABLE_DOXYGEN='Off'",
+    "-DLLVM_ENABLE_SPHINX='Off'",
+    "-DLLVM_ENABLE_OCAMLDOC='Off'",
+    "-DLLVM_ENABLE_ZLIB='Off'",
+    "-DLLVM_ENABLE_ZSTD='Off'",
+    "-DLLVM_ENABLE_LIBXML2='Off'",
+    "-DLLVM_ENABLE_BINDINGS='Off'",
+    "-DLLVM_ENABLE_TERMINFO='Off'",
+    "-DLLVM_ENABLE_LIBEDIT='Off'",
+    "-DLLVM_ENABLE_LIBPFM='Off'",
+    "-DCMAKE_EXPORT_COMPILE_COMMANDS='On'",
+    "-DPython3_FIND_REGISTRY='LAST'", // Use Python version from $PATH, not from registry
+    "-DBUG_REPORT_URL='https://github.com/paritytech/contract-issues/issues/'",
+];
+
+/// The build options shared by all platforms except MUSL.
+pub const SHARED_BUILD_OPTS_NOT_MUSL: [&str; 4] = [
+    "-DLLVM_OPTIMIZED_TABLEGEN='On'",
+    "-DLLVM_BUILD_RUNTIME='Off'",
+    "-DLLVM_BUILD_RUNTIMES='Off'",
+    "-DLLVM_INCLUDE_RUNTIMES='Off'",
+];
+
+/// The shared build options to treat warnings as errors.
+///
+/// Disabled on Windows due to the following upstream issue with MSYS2 with mingw-w64:
+/// ProgramTest.cpp:23:15: error: '__p__environ' redeclared without 'dllimport' attribute
+pub fn shared_build_opts_werror(target_env: TargetEnv) -> Vec<String> {
+    vec![format!(
+        "-DLLVM_ENABLE_WERROR='{}'",
+        if cfg!(target_os = "windows") || target_env == TargetEnv::Emscripten {
+            "Off"
+        } else {
+            "On"
+        },
+    )]
+}
+
+/// The build options to set the default target.
+pub fn shared_build_opts_default_target(target: Option<TargetTriple>) -> Vec<String> {
+    match target {
+        Some(target) => vec![format!(
+            "-DLLVM_DEFAULT_TARGET_TRIPLE='{}'",
+            target.to_string()
+        )],
+        None => vec![format!(
+            "-DLLVM_DEFAULT_TARGET_TRIPLE='{}'",
+            TargetTriple::PolkaVM
+        )],
+    }
+}
+
+/// The `musl` building sequence.
+pub fn build_musl(build_directory: &Path, target_directory: &Path) -> anyhow::Result<()> {
+    std::fs::create_dir_all(build_directory)?;
+    std::fs::create_dir_all(target_directory)?;
+
+    crate::utils::command(
+        Command::new("../configure")
+            .current_dir(build_directory)
+            .arg(format!("--prefix={}", target_directory.to_string_lossy()))
+            .arg(format!(
+                "--syslibdir={}/lib/",
+                target_directory.to_string_lossy()
+            ))
+            .arg("--enable-wrapper='clang'"),
+        "MUSL configuring",
+    )?;
+    crate::utils::command(
+        Command::new("make")
+            .current_dir(build_directory)
+            .arg("-j")
+            .arg(num_cpus::get().to_string()),
+        "MUSL building",
+    )?;
+    crate::utils::command(
+        Command::new("make")
+            .current_dir(build_directory)
+            .arg("install"),
+        "MUSL installing",
+    )?;
+
+    let mut include_directory = target_directory.to_path_buf();
+    include_directory.push("include/");
+
+    let mut asm_include_directory = include_directory.clone();
+    asm_include_directory.push("asm/");
+    std::fs::create_dir_all(asm_include_directory.as_path())?;
+
+    let mut types_header_path = asm_include_directory.clone();
+    types_header_path.push("types.h");
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy("/usr/include/linux", include_directory, &copy_options)?;
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        content_only: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy(
+        "/usr/include/asm-generic",
+        asm_include_directory,
+        &copy_options,
+    )?;
+
+    crate::utils::command(
+        Command::new("sed")
+            .arg("-i")
+            .arg("s/asm-generic/asm/")
+            .arg(types_header_path),
+        "types_header asm signature replacement",
+    )?;
+
+    Ok(())
+}
+
+/// The build options to enable assertions.
+pub fn shared_build_opts_assertions(enabled: bool) -> Vec<String> {
+    vec![format!(
+        "-DLLVM_ENABLE_ASSERTIONS='{}'",
+        if enabled { "On" } else { "Off" },
+    )]
+}
+
+/// The build options to build with RTTI support.
+pub fn shared_build_opts_rtti(enabled: bool) -> Vec<String> {
+    vec![format!(
+        "-DLLVM_ENABLE_RTTI='{}'",
+        if enabled { "On" } else { "Off" },
+    )]
+}
+
+/// The build options to enable sanitizers.
+pub fn shared_build_opts_sanitizers(sanitizer: Option<Sanitizer>) -> Vec<String> {
+    match sanitizer {
+        Some(sanitizer) => vec![format!("-DLLVM_USE_SANITIZER='{}'", sanitizer)],
+        None => vec![],
+    }
+}
+
+/// The build options to enable Valgrind for LLVM regression tests.
+pub fn shared_build_opts_valgrind(enabled: bool) -> Vec<String> {
+    if enabled {
+        vec!["-DLLVM_LIT_ARGS='-sv --vg --vg-leak'".to_owned()]
+    } else {
+        vec![]
+    }
+}
+
+/// The LLVM tests build options shared by all platforms.
+pub fn shared_build_opts_tests(enabled: bool) -> Vec<String> {
+    vec![
+        format!(
+            "-DLLVM_BUILD_UTILS='{}'",
+            if enabled { "On" } else { "Off" },
+        ),
+        format!(
+            "-DLLVM_BUILD_TESTS='{}'",
+            if enabled { "On" } else { "Off" },
+        ),
+        format!(
+            "-DLLVM_INCLUDE_UTILS='{}'",
+            if enabled { "On" } else { "Off" },
+        ),
+        format!(
+            "-DLLVM_INCLUDE_TESTS='{}'",
+            if enabled { "On" } else { "Off" },
+        ),
+    ]
+}
+
+/// The code coverage build options shared by all platforms.
+pub fn shared_build_opts_coverage(enabled: bool) -> Vec<String> {
+    vec![format!(
+        "-DLLVM_BUILD_INSTRUMENTED_COVERAGE='{}'",
+        if enabled { "On" } else { "Off" },
+    )]
+}
+
+/// Use of compiler cache (ccache) to speed up the build process.
+pub fn shared_build_opts_ccache(ccache_variant: Option<CcacheVariant>) -> Vec<String> {
+    match ccache_variant {
+        Some(ccache_variant) => vec![
+            format!(
+                "-DCMAKE_C_COMPILER_LAUNCHER='{}'",
+                ccache_variant.to_string()
+            ),
+            format!(
+                "-DCMAKE_CXX_COMPILER_LAUNCHER='{}'",
+                ccache_variant.to_string()
+            ),
+        ],
+        None => vec![],
+    }
+}
+
+/// Ignore duplicate libraries warnings for MacOS with XCode>=15.
+pub fn macos_build_opts_ignore_dupicate_libs_warnings() -> Vec<String> {
+    let xcode_version =
+        crate::utils::get_xcode_version().unwrap_or(crate::utils::XCODE_MIN_VERSION);
+    if xcode_version >= crate::utils::XCODE_VERSION_15 {
+        vec![
+            "-DCMAKE_EXE_LINKER_FLAGS='-Wl,-no_warn_duplicate_libraries'".to_owned(),
+            "-DCMAKE_SHARED_LINKER_FLAGS='-Wl,-no_warn_duplicate_libraries'".to_owned(),
+        ]
+    } else {
+        vec![]
+    }
+}
@@ -0,0 +1,224 @@
+//! The revive LLVM `wasm32_unknown_emscripten` builder.
+//!
+//! Cross-compiling LLVM for Emscripten requires llvm-tblgen, clang-tblgen and llvm-config.
+
+use std::{collections::HashSet, path::Path, process::Command};
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: crate::BuildType,
+    targets: HashSet<crate::Platform>,
+    llvm_projects: HashSet<crate::llvm_project::LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<crate::TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<crate::ccache_variant::CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<crate::sanitizer::Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("ninja")?;
+    crate::utils::check_presence("emsdk")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    if cfg!(target_os = "linux") {
+        crate::utils::check_presence("lld")?;
+    }
+
+    let llvm_module_llvm = crate::LLVMPath::llvm_module_llvm()?;
+    let llvm_host_module_llvm = crate::LLVMPath::llvm_host_module_llvm()?;
+
+    let llvm_build_host = crate::LLVMPath::llvm_build_host()?;
+    let llvm_target_host = crate::LLVMPath::llvm_target_host()?;
+
+    let llvm_build_final = crate::LLVMPath::llvm_build_final()?;
+    let llvm_target_final = crate::LLVMPath::llvm_target_final()?;
+
+    build_host(
+        llvm_host_module_llvm.as_path(),
+        llvm_build_host.as_path(),
+        llvm_target_host.as_path(),
+        ccache_variant,
+    )?;
+
+    build_target(
+        build_type,
+        targets,
+        llvm_projects,
+        enable_rtti,
+        default_target,
+        llvm_module_llvm.as_path(),
+        llvm_build_final.as_path(),
+        llvm_target_final.as_path(),
+        llvm_target_host.as_path(),
+        enable_tests,
+        enable_coverage,
+        extra_args,
+        ccache_variant,
+        enable_assertions,
+        sanitizer,
+        enable_valgrind,
+    )?;
+
+    Ok(())
+}
+
+/// The host toolchain building sequence.
+fn build_host(
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    ccache_variant: Option<crate::ccache_variant::CcacheVariant>,
+) -> anyhow::Result<()> {
+    log::info!("building the LLVM Emscripten host utilities");
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                &format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                ),
+                "-DLLVM_BUILD_SHARED_LIBS='Off'",
+                "-DCMAKE_BUILD_TYPE='Release'",
+                &format!(
+                    "-DLLVM_TARGETS_TO_BUILD='WebAssembly;{}'",
+                    crate::Platform::PolkaVM
+                ),
+                "-DLLVM_ENABLE_PROJECTS='clang;lld'",
+            ])
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            )),
+        "LLVM host building cmake config",
+    )?;
+
+    crate::utils::ninja(build_directory)?;
+
+    Ok(())
+}
+
+/// The target toolchain building sequence.
+#[allow(clippy::too_many_arguments)]
+fn build_target(
+    build_type: crate::BuildType,
+    targets: HashSet<crate::Platform>,
+    llvm_projects: HashSet<crate::llvm_project::LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<crate::TargetTriple>,
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    host_target_directory: &Path,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<crate::ccache_variant::CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<crate::sanitizer::Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    let mut llvm_tblgen_path = host_target_directory.to_path_buf();
+    llvm_tblgen_path.push("bin/llvm-tblgen");
+
+    let mut clang_tblgen_path = host_target_directory.to_path_buf();
+    clang_tblgen_path.push("bin/clang-tblgen");
+
+    crate::utils::command(
+        Command::new("emcmake")
+            .env("EMCC_DEBUG", "2")
+            .env("CXXFLAGS", "-Dwait4=__syscall_wait4")
+            .env("LDFLAGS", "-lnodefs.js -s NO_INVOKE_RUN -s EXIT_RUNTIME -s INITIAL_MEMORY=64MB -s ALLOW_MEMORY_GROWTH -s EXPORTED_RUNTIME_METHODS=FS,callMain,NODEFS -s MODULARIZE -s EXPORT_ES6 -s WASM_BIGINT")
+            .arg("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                "-DCMAKE_BUILD_WITH_INSTALL_RPATH=1",
+                // Enable thin LTO but emscripten has various issues with it.
+                // FIXME: https://github.com/paritytech/revive/issues/148
+                //"-DLLVM_ENABLE_LTO='Thin'",
+                //"-DCMAKE_EXE_LINKER_FLAGS='-Wl,-u,htons -Wl,-u,htonl -Wl,-u,fileno -Wl,-u,ntohs'",
+                &format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                ),
+                &format!("-DCMAKE_BUILD_TYPE='{build_type}'"),
+                &format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                ),
+                &format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                ),
+                "-DLLVM_BUILD_SHARED_LIBS='Off'",
+                "-DLLVM_ENABLE_DUMP='Off'",
+                "-DLLVM_ENABLE_EXPENSIVE_CHECKS='Off'",
+                "-DLLVM_ENABLE_BACKTRACES='Off'",
+                "-DLLVM_ENABLE_BACKTRACES='Off'",
+                "-DLLVM_ENABLE_THREADS='Off'",
+                "-DLLVM_BUILD_TOOLS='Off'",
+                &format!("-DLLVM_TABLEGEN='{}'", llvm_tblgen_path.to_string_lossy()),
+                &format!("-DCLANG_TABLEGEN='{}'", clang_tblgen_path.to_string_lossy()),
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(crate::target_env::TargetEnv::Emscripten))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_valgrind(
+                enable_valgrind,
+            )),
+        "LLVM target building cmake",
+    )?;
+
+    crate::utils::ninja(build_directory)?;
+
+    Ok(())
+}
@@ -0,0 +1,111 @@
+//! The revive LLVM amd64 `linux-gnu` builder.
+
+use std::collections::HashSet;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    crate::utils::check_presence("lld")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_llvm.to_string_lossy().as_ref(),
+                "-B",
+                llvm_build_final.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    llvm_target_final.to_string_lossy().as_ref(),
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                "-DLLVM_USE_LINKER='lld'",
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::GNU,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_valgrind(
+                enable_valgrind,
+            )),
+        "LLVM building cmake",
+    )?;
+    crate::utils::ninja(llvm_build_final.as_ref())?;
+    Ok(())
+}
@@ -0,0 +1,394 @@
+//! The revive LLVM amd64 `linux-musl` builder.
+
+use std::collections::HashSet;
+use std::path::Path;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    log::info!("building for target x86_64_linux_musl");
+
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    crate::utils::check_presence("lld")?;
+    crate::utils::check_presence("ninja")?;
+
+    let musl_name = "musl-1.2.3";
+    let musl_build = LLVMPath::musl_build(musl_name)?;
+    let musl_target = LLVMPath::musl_target()?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_host_module_llvm = LLVMPath::llvm_host_module_llvm()?;
+
+    let llvm_build_crt = LLVMPath::llvm_build_crt()?;
+    let llvm_target_crt = LLVMPath::llvm_target_crt()?;
+
+    let llvm_build_host = LLVMPath::llvm_build_host()?;
+    let llvm_target_host = LLVMPath::llvm_target_host()?;
+
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    if !LLVMPath::musl_source(musl_name)?.exists() {
+        crate::utils::download_musl(musl_name)?;
+    }
+    crate::platforms::shared::build_musl(musl_build.as_path(), musl_target.as_path())?;
+    build_crt(
+        targets.clone(),
+        llvm_host_module_llvm.as_path(),
+        llvm_build_crt.as_path(),
+        llvm_target_crt.as_path(),
+        ccache_variant,
+    )?;
+    build_host(
+        llvm_host_module_llvm.as_path(),
+        llvm_build_host.as_path(),
+        llvm_target_host.as_path(),
+        musl_target.as_path(),
+        llvm_target_crt.as_path(),
+        ccache_variant,
+    )?;
+    build_target(
+        build_type,
+        targets,
+        llvm_projects,
+        enable_rtti,
+        default_target,
+        llvm_module_llvm.as_path(),
+        llvm_build_final.as_path(),
+        llvm_target_final.as_path(),
+        musl_target.as_path(),
+        llvm_target_host.as_path(),
+        enable_tests,
+        enable_coverage,
+        extra_args,
+        ccache_variant,
+        enable_assertions,
+        sanitizer,
+        enable_valgrind,
+    )?;
+
+    Ok(())
+}
+
+/// The `crt` building sequence.
+fn build_crt(
+    mut targets: HashSet<Platform>,
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    ccache_variant: Option<CcacheVariant>,
+) -> anyhow::Result<()> {
+    targets.insert(Platform::X86);
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_BUILD_TYPE='Release'",
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                "-DLLVM_ENABLE_PROJECTS='compiler-rt'",
+                format!("-DLLVM_TARGETS_TO_BUILD='{}'", Platform::X86).as_str(),
+                "-DLLVM_DEFAULT_TARGET_TRIPLE='x86_64-pc-linux-musl'",
+                "-DLLVM_BUILD_TESTS='Off'",
+                "-DLLVM_BUILD_RUNTIMES='Off'",
+                "-DLLVM_BUILD_UTILS='Off'",
+                "-DLLVM_INCLUDE_TESTS='Off'",
+                "-DLLVM_INCLUDE_RUNTIMES='Off'",
+                "-DLLVM_INCLUDE_UTILS='Off'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ARCH='x86_64'",
+                "-DCOMPILER_RT_BUILD_CRT='On'",
+                "-DCOMPILER_RT_BUILD_SANITIZERS='Off'",
+                "-DCOMPILER_RT_BUILD_XRAY='Off'",
+                "-DCOMPILER_RT_BUILD_LIBFUZZER='Off'",
+                "-DCOMPILER_RT_BUILD_PROFILE='Off'",
+                "-DCOMPILER_RT_BUILD_MEMPROF='Off'",
+                "-DCOMPILER_RT_BUILD_ORC='Off'",
+            ])
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            )),
+        "CRT building cmake",
+    )?;
+
+    crate::utils::command(
+        Command::new("ninja")
+            .arg("-C")
+            .arg(build_directory)
+            .arg("install-crt"),
+        "CRT building ninja",
+    )?;
+
+    Ok(())
+}
+
+/// The host toolchain building sequence.
+fn build_host(
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    musl_target_directory: &Path,
+    crt_target_directory: &Path,
+    ccache_variant: Option<CcacheVariant>,
+) -> anyhow::Result<()> {
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DDEFAULT_SYSROOT='{}'",
+                    musl_target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_BUILD_TYPE='Release'",
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                "-DCLANG_DEFAULT_CXX_STDLIB='libc++'",
+                "-DCLANG_DEFAULT_RTLIB='compiler-rt'",
+                "-DLLVM_DEFAULT_TARGET_TRIPLE='x86_64-pc-linux-musl'",
+                "-DLLVM_TARGETS_TO_BUILD='X86'",
+                "-DLLVM_BUILD_TESTS='Off'",
+                "-DLLVM_BUILD_UTILS='Off'",
+                "-DLLVM_INCLUDE_TESTS='Off'",
+                "-DLLVM_INCLUDE_UTILS='Off'",
+                "-DLLVM_ENABLE_PROJECTS='clang;lld'",
+                "-DLLVM_ENABLE_RUNTIMES='compiler-rt;libcxx;libcxxabi;libunwind'",
+                "-DLIBCXX_CXX_ABI='libcxxabi'",
+                "-DLIBCXX_HAS_MUSL_LIBC='On'",
+                "-DLIBCXX_ENABLE_SHARED='Off'",
+                "-DLIBCXX_ENABLE_STATIC='On'",
+                "-DLIBCXX_ENABLE_STATIC_ABI_LIBRARY='On'",
+                "-DLIBCXXABI_ENABLE_SHARED='Off'",
+                "-DLIBCXXABI_ENABLE_STATIC='On'",
+                "-DLIBCXXABI_ENABLE_STATIC_UNWINDER='On'",
+                "-DLIBCXXABI_USE_LLVM_UNWINDER='On'",
+                "-DLIBCXXABI_USE_COMPILER_RT='On'",
+                "-DLIBUNWIND_ENABLE_STATIC='On'",
+                "-DLIBUNWIND_ENABLE_SHARED='Off'",
+                "-DCOMPILER_RT_BUILD_CRT='On'",
+                "-DCOMPILER_RT_BUILD_SANITIZERS='Off'",
+                "-DCOMPILER_RT_BUILD_XRAY='Off'",
+                "-DCOMPILER_RT_BUILD_LIBFUZZER='Off'",
+                "-DCOMPILER_RT_BUILD_PROFILE='On'",
+                "-DCOMPILER_RT_BUILD_MEMPROF='Off'",
+                "-DCOMPILER_RT_BUILD_ORC='Off'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ARCH='x86_64'",
+                "-DCOMPILER_RT_DEFAULT_TARGET_ONLY='On'",
+                "-DLIBCLANG_BUILD_STATIC='On'",
+                "-DBUILD_SHARED_LIBS='Off'",
+            ])
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            )),
+        "LLVM host building cmake",
+    )?;
+
+    let mut crt_lib_directory = crt_target_directory.to_path_buf();
+    crt_lib_directory.push("lib/");
+
+    let mut build_lib_directory = build_directory.to_path_buf();
+    build_lib_directory.push("lib/");
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        content_only: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy(crt_lib_directory, build_lib_directory, &copy_options)?;
+
+    crate::utils::command(
+        Command::new("ninja")
+            .arg("-C")
+            .arg(build_directory)
+            .arg("install"),
+        "LLVM host building ninja",
+    )?;
+
+    Ok(())
+}
+
+/// The target toolchain building sequence.
+#[allow(clippy::too_many_arguments)]
+fn build_target(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    source_directory: &Path,
+    build_directory: &Path,
+    target_directory: &Path,
+    musl_target_directory: &Path,
+    host_target_directory: &Path,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+    enable_valgrind: bool,
+) -> anyhow::Result<()> {
+    let mut clang_path = host_target_directory.to_path_buf();
+    clang_path.push("bin/clang");
+
+    let mut clang_cxx_path = host_target_directory.to_path_buf();
+    clang_cxx_path.push("bin/clang++");
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                source_directory.to_string_lossy().as_ref(),
+                "-B",
+                build_directory.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                "-DBUILD_SHARED_LIBS='Off'",
+                "-DLIBCLANG_BUILD_STATIC='On'",
+                "-DLLVM_BUILD_STATIC='On'",
+                "-DLINKER_SUPPORTS_COLOR_DIAGNOSTICS=0",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    target_directory.to_string_lossy()
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                format!("-DCMAKE_C_COMPILER='{}'", clang_path.to_string_lossy()).as_str(),
+                format!(
+                    "-DCMAKE_CXX_COMPILER='{}'",
+                    clang_cxx_path.to_string_lossy()
+                )
+                .as_str(),
+                "-DCMAKE_FIND_LIBRARY_SUFFIXES='.a'",
+                "-DCMAKE_BUILD_WITH_INSTALL_RPATH=1",
+                "-DCMAKE_EXE_LINKER_FLAGS='-fuse-ld=lld -static'",
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::MUSL,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_valgrind(
+                enable_valgrind,
+            )),
+        "LLVM target building cmake",
+    )?;
+
+    crate::utils::ninja(build_directory)?;
+
+    let mut musl_lib_directory = musl_target_directory.to_path_buf();
+    musl_lib_directory.push("lib/");
+
+    let mut host_lib_directory = host_target_directory.to_path_buf();
+    host_lib_directory.push("lib/x86_64-pc-linux-musl/");
+
+    let mut target_lib_directory = target_directory.to_path_buf();
+    target_lib_directory.push("lib/");
+
+    let copy_options = fs_extra::dir::CopyOptions {
+        overwrite: true,
+        copy_inside: true,
+        content_only: true,
+        ..Default::default()
+    };
+    fs_extra::dir::copy(
+        musl_lib_directory,
+        target_lib_directory.as_path(),
+        &copy_options,
+    )?;
+    fs_extra::dir::copy(
+        host_lib_directory,
+        target_lib_directory.as_path(),
+        &copy_options,
+    )?;
+
+    Ok(())
+}
@@ -0,0 +1,105 @@
+//! The revive LLVM amd64 `macos` builder.
+
+use std::collections::HashSet;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_llvm = LLVMPath::llvm_module_llvm()?;
+    let llvm_build_final = LLVMPath::llvm_build_final()?;
+    let llvm_target_final = LLVMPath::llvm_target_final()?;
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_llvm.to_string_lossy().as_ref(),
+                "-B",
+                llvm_build_final.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    llvm_target_final.to_string_lossy().as_ref(),
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                "-DCMAKE_OSX_DEPLOYMENT_TARGET='11.0'",
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::GNU,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::macos_build_opts_ignore_dupicate_libs_warnings())
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            )),
+        "LLVM building cmake",
+    )?;
+
+    crate::utils::ninja(llvm_build_final.as_ref())?;
+
+    Ok(())
+}
@@ -0,0 +1,127 @@
+//! The revive LLVM amd64 `windows-gnu` builder.
+
+use std::collections::HashSet;
+use std::path::PathBuf;
+use std::process::Command;
+
+use crate::build_type::BuildType;
+use crate::ccache_variant::CcacheVariant;
+use crate::llvm_path::LLVMPath;
+use crate::llvm_project::LLVMProject;
+use crate::platforms::Platform;
+use crate::sanitizer::Sanitizer;
+use crate::target_triple::TargetTriple;
+
+/// The building sequence.
+#[allow(clippy::too_many_arguments)]
+pub fn build(
+    build_type: BuildType,
+    targets: HashSet<Platform>,
+    llvm_projects: HashSet<LLVMProject>,
+    enable_rtti: bool,
+    default_target: Option<TargetTriple>,
+    enable_tests: bool,
+    enable_coverage: bool,
+    extra_args: &[String],
+    ccache_variant: Option<CcacheVariant>,
+    enable_assertions: bool,
+    sanitizer: Option<Sanitizer>,
+) -> anyhow::Result<()> {
+    crate::utils::check_presence("cmake")?;
+    crate::utils::check_presence("clang")?;
+    crate::utils::check_presence("clang++")?;
+    crate::utils::check_presence("lld")?;
+    crate::utils::check_presence("ninja")?;
+
+    let llvm_module_llvm =
+        LLVMPath::llvm_module_llvm().and_then(crate::utils::path_windows_to_unix)?;
+    let llvm_build_final =
+        LLVMPath::llvm_build_final().and_then(crate::utils::path_windows_to_unix)?;
+    let llvm_target_final =
+        LLVMPath::llvm_target_final().and_then(crate::utils::path_windows_to_unix)?;
+
+    crate::utils::command(
+        Command::new("cmake")
+            .args([
+                "-S",
+                llvm_module_llvm.to_string_lossy().as_ref(),
+                "-B",
+                llvm_build_final.to_string_lossy().as_ref(),
+                "-G",
+                "Ninja",
+                format!(
+                    "-DCMAKE_INSTALL_PREFIX='{}'",
+                    llvm_target_final.to_string_lossy().as_ref(),
+                )
+                .as_str(),
+                format!("-DCMAKE_BUILD_TYPE='{build_type}'").as_str(),
+                "-DCMAKE_C_COMPILER='clang'",
+                "-DCMAKE_CXX_COMPILER='clang++'",
+                format!(
+                    "-DLLVM_TARGETS_TO_BUILD='{}'",
+                    targets
+                        .into_iter()
+                        .map(|platform| platform.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                format!(
+                    "-DLLVM_ENABLE_PROJECTS='{}'",
+                    llvm_projects
+                        .into_iter()
+                        .map(|project| project.to_string())
+                        .collect::<Vec<String>>()
+                        .join(";")
+                )
+                .as_str(),
+                "-DLLVM_USE_LINKER='lld'",
+            ])
+            .args(crate::platforms::shared::shared_build_opts_default_target(
+                default_target,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_tests(
+                enable_tests,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_coverage(
+                enable_coverage,
+            ))
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS)
+            .args(crate::platforms::shared::SHARED_BUILD_OPTS_NOT_MUSL)
+            .args(crate::platforms::shared::shared_build_opts_werror(
+                crate::target_env::TargetEnv::GNU,
+            ))
+            .args(extra_args)
+            .args(crate::platforms::shared::shared_build_opts_ccache(
+                ccache_variant,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_assertions(
+                enable_assertions,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_rtti(
+                enable_rtti,
+            ))
+            .args(crate::platforms::shared::shared_build_opts_sanitizers(
+                sanitizer,
+            )),
+        "LLVM building cmake",
+    )?;
+
+    crate::utils::ninja(llvm_build_final.as_ref())?;
+
+    let libstdcpp_source_path = match std::env::var("LIBSTDCPP_SOURCE_PATH") {
+        Ok(libstdcpp_source_path) => PathBuf::from(libstdcpp_source_path),
+        Err(error) => anyhow::bail!(
+            "The `LIBSTDCPP_SOURCE_PATH` must be set to the path to the libstdc++.a static library: {}", error
+        ),
+    };
+    let mut libstdcpp_destination_path = llvm_target_final;
+    libstdcpp_destination_path.push("./lib/libstdc++.a");
+    fs_extra::file::copy(
+        crate::utils::path_windows_to_unix(libstdcpp_source_path)?,
+        crate::utils::path_windows_to_unix(libstdcpp_destination_path)?,
+        &fs_extra::file::CopyOptions::default(),
+    )?;
+
+    Ok(())
+}
@@ -0,0 +1,119 @@
+//! The revive LLVM builder arguments.
+
+use clap::Parser;
+use revive_llvm_builder::ccache_variant::CcacheVariant;
+
+/// The revive LLVM builder arguments.
+#[derive(Debug, Parser)]
+#[command(version, about)]
+pub struct Arguments {
+    /// Target environment to build LLVM (gnu, musl, emscripten).
+    #[arg(long, default_value_t = revive_llvm_builder::target_env::TargetEnv::GNU)]
+    pub target_env: revive_llvm_builder::target_env::TargetEnv,
+
+    #[command(subcommand)]
+    pub subcommand: Subcommand,
+}
+
+/// The revive LLVM builder arguments.
+#[derive(Debug, clap::Subcommand)]
+pub enum Subcommand {
+    /// Clone the branch specified in `LLVM.lock`.
+    Clone {
+        /// Clone with full commits history.
+        #[arg(long)]
+        deep: bool,
+    },
+
+    /// Build the LLVM framework.
+    Build {
+        /// LLVM build type (`Debug`, `Release`, `RelWithDebInfo`, or `MinSizeRel`).
+        #[arg(long, default_value_t = revive_llvm_builder::BuildType::Release)]
+        build_type: revive_llvm_builder::BuildType,
+
+        /// Additional targets to build LLVM with.
+        #[arg(long)]
+        targets: Vec<String>,
+
+        /// LLVM projects to build LLVM with.
+        #[arg(
+            long,
+            default_values_t = vec![
+                revive_llvm_builder::llvm_project::LLVMProject::CLANG,
+                revive_llvm_builder::llvm_project::LLVMProject::LLD
+            ]
+        )]
+        llvm_projects: Vec<revive_llvm_builder::llvm_project::LLVMProject>,
+
+        /// Whether to build LLVM with run-time type information (RTTI) enabled.
+        #[arg(long)]
+        enable_rtti: bool,
+
+        /// The default target to build LLVM with.
+        #[arg(long)]
+        default_target: Option<revive_llvm_builder::target_triple::TargetTriple>,
+
+        /// Whether to build the LLVM tests.
+        #[arg(long)]
+        enable_tests: bool,
+
+        /// Whether to build LLVM for source-based code coverage.
+        #[arg(long)]
+        enable_coverage: bool,
+
+        /// Extra arguments to pass to CMake.  
+        /// A leading backslash will be unescaped.
+        #[arg(long)]
+        extra_args: Vec<String>,
+
+        /// Whether to use compiler cache (ccache) to speed-up builds.
+        #[arg(long)]
+        ccache_variant: Option<CcacheVariant>,
+
+        /// Whether to build with assertions enabled or not.
+        #[arg(long, default_value_t = true)]
+        enable_assertions: bool,
+
+        /// Build LLVM with sanitizer enabled (`Address`, `Memory`, `MemoryWithOrigins`, `Undefined`, `Thread`, `DataFlow`, or `Address;Undefined`).
+        #[arg(long)]
+        sanitizer: Option<revive_llvm_builder::sanitizer::Sanitizer>,
+
+        /// Whether to run LLVM unit tests under valgrind or not.
+        #[arg(long)]
+        enable_valgrind: bool,
+    },
+
+    /// Checkout the branch specified in `LLVM.lock`.
+    Checkout {
+        /// Remove all artifacts preventing the checkout (removes all local changes!).
+        #[arg(long)]
+        force: bool,
+    },
+
+    /// Clean the build artifacts.
+    Clean,
+
+    /// Build the LLVM compiler-rt builtins for the PolkaVM target.
+    Builtins {
+        /// LLVM build type (`Debug`, `Release`, `RelWithDebInfo`, or `MinSizeRel`).
+        #[arg(long, default_value_t = revive_llvm_builder::BuildType::Release)]
+        build_type: revive_llvm_builder::BuildType,
+
+        /// The default target to build LLVM with.
+        #[arg(long)]
+        default_target: Option<revive_llvm_builder::target_triple::TargetTriple>,
+
+        /// Extra arguments to pass to CMake.  
+        /// A leading backslash will be unescaped.
+        #[arg(long)]
+        extra_args: Vec<String>,
+
+        /// Whether to use compiler cache (ccache) to speed-up builds.
+        #[arg(long)]
+        ccache_variant: Option<CcacheVariant>,
+
+        /// Build LLVM with sanitizer enabled (`Address`, `Memory`, `MemoryWithOrigins`, `Undefined`, `Thread`, `DataFlow`, or `Address;Undefined`).
+        #[arg(long)]
+        sanitizer: Option<revive_llvm_builder::sanitizer::Sanitizer>,
+    },
+}
@@ -0,0 +1,141 @@
+//! The revive LLVM builder.
+
+pub(crate) mod arguments;
+
+use std::collections::HashSet;
+use std::path::PathBuf;
+use std::str::FromStr;
+
+use anyhow::Context;
+use clap::Parser;
+
+use self::arguments::{Arguments, Subcommand};
+
+fn main() {
+    env_logger::init();
+
+    match main_inner() {
+        Ok(()) => std::process::exit(0),
+        Err(error) => {
+            log::error!("{error:?}");
+            std::process::exit(1)
+        }
+    }
+}
+
+fn main_inner() -> anyhow::Result<()> {
+    let arguments = Arguments::parse();
+
+    revive_llvm_builder::utils::directory_target_llvm(arguments.target_env);
+
+    match arguments.subcommand {
+        Subcommand::Clone { deep } => {
+            let lock = revive_llvm_builder::Lock::try_from(&PathBuf::from(
+                revive_llvm_builder::lock::LLVM_LOCK_DEFAULT_PATH,
+            ))?;
+            revive_llvm_builder::clone(lock, deep, arguments.target_env)?;
+        }
+
+        Subcommand::Build {
+            build_type,
+            targets,
+            llvm_projects,
+            enable_rtti,
+            default_target,
+            enable_tests,
+            enable_coverage,
+            extra_args,
+            ccache_variant,
+            enable_assertions,
+            sanitizer,
+            enable_valgrind,
+        } => {
+            let mut targets = targets
+                .into_iter()
+                .map(|target| revive_llvm_builder::Platform::from_str(target.as_str()))
+                .collect::<Result<HashSet<revive_llvm_builder::Platform>, String>>()
+                .map_err(|platform| anyhow::anyhow!("Unknown platform `{}`", platform))?;
+            targets.insert(revive_llvm_builder::Platform::PolkaVM);
+
+            log::info!("build targets: {:?}", &targets);
+
+            let extra_args_unescaped: Vec<String> = extra_args
+                .iter()
+                .map(|argument| {
+                    argument
+                        .strip_prefix('\\')
+                        .unwrap_or(argument.as_str())
+                        .to_owned()
+                })
+                .collect();
+
+            log::debug!("extra_args: {:#?}", extra_args);
+            log::debug!("extra_args_unescaped: {:#?}", extra_args_unescaped);
+
+            if let Some(ccache_variant) = ccache_variant {
+                revive_llvm_builder::utils::check_presence(ccache_variant.to_string().as_str())?;
+            }
+
+            let mut projects = llvm_projects
+                .into_iter()
+                .map(|project| {
+                    revive_llvm_builder::llvm_project::LLVMProject::from_str(
+                        project.to_string().as_str(),
+                    )
+                })
+                .collect::<Result<HashSet<revive_llvm_builder::llvm_project::LLVMProject>, String>>(
+                )
+                .map_err(|project| anyhow::anyhow!("Unknown LLVM project `{}`", project))?;
+            projects.insert(revive_llvm_builder::llvm_project::LLVMProject::LLD);
+
+            log::info!("build projects: {:?}", &projects);
+
+            revive_llvm_builder::build(
+                build_type,
+                arguments.target_env,
+                targets,
+                projects,
+                enable_rtti,
+                default_target,
+                enable_tests,
+                enable_coverage,
+                &extra_args_unescaped,
+                ccache_variant,
+                enable_assertions,
+                sanitizer,
+                enable_valgrind,
+            )?;
+        }
+
+        Subcommand::Checkout { force } => {
+            let lock = revive_llvm_builder::Lock::try_from(&PathBuf::from(
+                revive_llvm_builder::lock::LLVM_LOCK_DEFAULT_PATH,
+            ))?;
+            revive_llvm_builder::checkout(lock, force)?;
+        }
+
+        Subcommand::Clean => {
+            revive_llvm_builder::clean()
+                .with_context(|| "Unable to remove target LLVM directory")?;
+        }
+
+        Subcommand::Builtins {
+            build_type,
+            default_target,
+            extra_args,
+            ccache_variant,
+            sanitizer,
+        } => {
+            revive_llvm_builder::builtins::build(
+                build_type,
+                arguments.target_env,
+                default_target,
+                &extra_args,
+                ccache_variant,
+                sanitizer,
+            )?;
+        }
+    }
+
+    Ok(())
+}
@@ -0,0 +1,50 @@
+//! LLVM sanitizers.
+
+/// LLVM sanitizers.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Sanitizer {
+    /// The address sanitizer.
+    Address,
+    /// The memory sanitizer.
+    Memory,
+    /// The memory with origins sanitizer.
+    MemoryWithOrigins,
+    /// The undefined behavior sanitizer
+    Undefined,
+    /// The thread sanitizer.
+    Thread,
+    /// The data flow sanitizer.
+    DataFlow,
+    /// Combine address and undefined behavior sanitizer.
+    AddressUndefined,
+}
+
+impl std::str::FromStr for Sanitizer {
+    type Err = String;
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value.to_lowercase().as_str() {
+            "address" => Ok(Self::Address),
+            "memory" => Ok(Self::Memory),
+            "memorywithorigins" => Ok(Self::MemoryWithOrigins),
+            "undefined" => Ok(Self::Undefined),
+            "thread" => Ok(Self::Thread),
+            "dataflow" => Ok(Self::DataFlow),
+            "address;undefined" => Ok(Self::AddressUndefined),
+            value => Err(format!("Unsupported sanitizer: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for Sanitizer {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::Address => write!(f, "Address"),
+            Self::Memory => write!(f, "Memory"),
+            Self::MemoryWithOrigins => write!(f, "MemoryWithOrigins"),
+            Self::Undefined => write!(f, "Undefined"),
+            Self::Thread => write!(f, "Thread"),
+            Self::DataFlow => write!(f, "DataFlow"),
+            Self::AddressUndefined => write!(f, "Address;Undefined"),
+        }
+    }
+}
@@ -0,0 +1,36 @@
+//! The target environments to build LLVM.
+
+/// The list of target environments used as constants.
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum TargetEnv {
+    /// The GNU target environment.
+    #[default]
+    GNU,
+    /// The MUSL target environment.
+    MUSL,
+    /// The wasm32 Emscripten environment.
+    Emscripten,
+}
+
+impl std::str::FromStr for TargetEnv {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value {
+            "gnu" => Ok(Self::GNU),
+            "musl" => Ok(Self::MUSL),
+            "emscripten" => Ok(Self::Emscripten),
+            value => Err(format!("Unsupported target environment: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for TargetEnv {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::GNU => write!(f, "gnu"),
+            Self::MUSL => write!(f, "musl"),
+            Self::Emscripten => write!(f, "emscripten"),
+        }
+    }
+}
@@ -0,0 +1,29 @@
+//! The PolkaVM LLVM target triples.
+
+/// The list of target triples used as constants.
+///
+/// It must be in the lowercase.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum TargetTriple {
+    /// The PolkaVM RISC-V target triple.
+    PolkaVM,
+}
+
+impl std::str::FromStr for TargetTriple {
+    type Err = String;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        match value {
+            "polkavm" => Ok(Self::PolkaVM),
+            value => Err(format!("Unsupported target triple: `{}`", value)),
+        }
+    }
+}
+
+impl std::fmt::Display for TargetTriple {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::PolkaVM => write!(f, "riscv64-unknown-elf"),
+        }
+    }
+}
@@ -0,0 +1,230 @@
+//! The LLVM builder utilities.
+
+use std::fs::File;
+use std::path::Path;
+use std::path::PathBuf;
+use std::process::Command;
+use std::process::Stdio;
+use std::time::Duration;
+
+use path_slash::PathBufExt;
+
+/// The LLVM host repository URL.
+pub const LLVM_HOST_SOURCE_URL: &str = "https://github.com/llvm/llvm-project";
+
+/// The LLVM host repository tag.
+pub const LLVM_HOST_SOURCE_TAG: &str = "llvmorg-18.1.8";
+
+/// The minimum required XCode version.
+pub const XCODE_MIN_VERSION: u32 = 11;
+
+/// The XCode version 15.
+pub const XCODE_VERSION_15: u32 = 15;
+
+/// The number of download retries if failed.
+pub const DOWNLOAD_RETRIES: u16 = 16;
+
+/// The number of parallel download requests.
+pub const DOWNLOAD_PARALLEL_REQUESTS: u16 = 1;
+
+/// The download timeout in seconds.
+pub const DOWNLOAD_TIMEOUT_SECONDS: u64 = 300;
+
+/// The musl snapshots URL.
+pub const MUSL_SNAPSHOTS_URL: &str = "https://git.musl-libc.org/cgit/musl/snapshot";
+
+/// The emscripten SDK git URL.
+pub const EMSDK_SOURCE_URL: &str = "https://github.com/emscripten-core/emsdk.git";
+
+/// The emscripten SDK version.
+pub const EMSDK_VERSION: &str = "3.1.64";
+
+/// The subprocess runner.
+///
+/// Checks the status and prints `stderr`.
+pub fn command(command: &mut Command, description: &str) -> anyhow::Result<()> {
+    log::debug!("executing '{command:?}' ({description})");
+
+    if std::env::var("DRY_RUN").is_ok() {
+        log::warn!("Only a dry run; not executing the command.");
+        return Ok(());
+    }
+
+    let status = command
+        .status()
+        .map_err(|error| anyhow::anyhow!("{} process: {}", description, error))?;
+
+    if !status.success() {
+        log::error!("the command '{command:?}' failed!");
+        anyhow::bail!("{} failed", description);
+    }
+
+    Ok(())
+}
+
+/// Download a file from the URL to the path.
+pub fn download(url: &str, path: &str) -> anyhow::Result<()> {
+    log::trace!("downloading '{url}' into '{path}'");
+
+    let mut downloader = downloader::Downloader::builder()
+        .download_folder(Path::new(path))
+        .parallel_requests(DOWNLOAD_PARALLEL_REQUESTS)
+        .retries(DOWNLOAD_RETRIES)
+        .timeout(Duration::from_secs(DOWNLOAD_TIMEOUT_SECONDS))
+        .build()?;
+    while let Err(error) = downloader.download(&[downloader::Download::new(url)]) {
+        log::error!("MUSL download from `{url}` failed: {error}");
+    }
+    Ok(())
+}
+
+/// Unpack a tarball.
+pub fn unpack_tar(filename: PathBuf, path: &str) -> anyhow::Result<()> {
+    let tar_gz = File::open(filename)?;
+    let tar = flate2::read::GzDecoder::new(tar_gz);
+    let mut archive = tar::Archive::new(tar);
+    archive.unpack(path)?;
+    Ok(())
+}
+
+/// The `musl` downloading sequence.
+pub fn download_musl(name: &str) -> anyhow::Result<()> {
+    log::info!("downloading musl {name}");
+    let tar_file_name = format!("{name}.tar.gz");
+    let url = format!("{}/{tar_file_name}", MUSL_SNAPSHOTS_URL);
+    let target_path = crate::llvm_path::DIRECTORY_LLVM_TARGET
+        .get()
+        .unwrap()
+        .to_string_lossy();
+    download(url.as_str(), &target_path)?;
+    let musl_tarball = crate::LLVMPath::musl_source(tar_file_name.as_str())?;
+    unpack_tar(musl_tarball, &target_path)?;
+    Ok(())
+}
+
+/// Call ninja to build the LLVM.
+pub fn ninja(build_dir: &Path) -> anyhow::Result<()> {
+    let mut ninja = Command::new("ninja");
+    ninja.args(["-C", build_dir.to_string_lossy().as_ref()]);
+    if std::env::var("DRY_RUN").is_ok() {
+        ninja.arg("-n");
+    }
+    command(ninja.arg("install"), "Running ninja install")?;
+    Ok(())
+}
+
+/// Create an absolute path, appending it to the current working directory.
+pub fn absolute_path<P: AsRef<Path>>(path: P) -> anyhow::Result<PathBuf> {
+    let mut full_path = std::env::current_dir()?;
+    full_path.push(path);
+    Ok(full_path)
+}
+
+///
+/// Converts a Windows path into a Unix path.
+///
+pub fn path_windows_to_unix<P: AsRef<Path> + PathBufExt>(path: P) -> anyhow::Result<PathBuf> {
+    path.to_slash()
+        .map(|pathbuf| PathBuf::from(pathbuf.to_string()))
+        .ok_or_else(|| anyhow::anyhow!("Windows-to-Unix path conversion error"))
+}
+
+/// Checks if the tool exists in the system.
+pub fn check_presence(name: &str) -> anyhow::Result<()> {
+    let description = &format!("checking the `{name}` executable");
+    log::info!("{description}");
+
+    command(Command::new("which").arg(name), description)
+        .map_err(|_| anyhow::anyhow!("Tool `{}` is missing. Please install", name))
+}
+
+/// Identify XCode version using `pkgutil`.
+pub fn get_xcode_version() -> anyhow::Result<u32> {
+    let pkgutil = Command::new("pkgutil")
+        .args(["--pkg-info", "com.apple.pkg.CLTools_Executables"])
+        .stdout(Stdio::piped())
+        .spawn()
+        .map_err(|error| anyhow::anyhow!("`pkgutil` process: {}", error))?;
+    let grep_version = Command::new("grep")
+        .arg("version")
+        .stdin(Stdio::from(pkgutil.stdout.expect(
+            "Failed to identify XCode version - XCode or CLI tools are not installed",
+        )))
+        .output()
+        .map_err(|error| anyhow::anyhow!("`grep` process: {}", error))?;
+    let version_string = String::from_utf8(grep_version.stdout)?;
+    let version_regex = regex::Regex::new(r"version: (\d+)\..*")?;
+    let captures = version_regex
+        .captures(version_string.as_str())
+        .ok_or(anyhow::anyhow!(
+            "Failed to parse XCode version: {version_string}"
+        ))?;
+    let xcode_version: u32 = captures
+        .get(1)
+        .expect("Always has a major version")
+        .as_str()
+        .parse()
+        .map_err(|error| anyhow::anyhow!("Failed to parse XCode version: {error}"))?;
+    Ok(xcode_version)
+}
+
+/// Install the Emscripten SDK.
+pub fn install_emsdk() -> anyhow::Result<()> {
+    log::info!("installing emsdk v{EMSDK_VERSION}");
+
+    let emsdk_source_path = PathBuf::from(crate::LLVMPath::DIRECTORY_EMSDK_SOURCE);
+
+    if emsdk_source_path.exists() {
+        log::warn!(
+            "emsdk source path {emsdk_source_path:?} already exists.
+            Skipping the emsdk installation, delete the source path for re-installation"
+        );
+        return Ok(());
+    }
+
+    crate::utils::command(
+        Command::new("git")
+            .arg("clone")
+            .arg(crate::utils::EMSDK_SOURCE_URL)
+            .arg(emsdk_source_path.to_string_lossy().as_ref()),
+        "Emscripten SDK repository cloning",
+    )?;
+
+    crate::utils::command(
+        Command::new("git")
+            .arg("checkout")
+            .arg(format!("tags/{}", crate::utils::EMSDK_VERSION))
+            .current_dir(&emsdk_source_path),
+        "Emscripten SDK repository version checkout",
+    )?;
+
+    crate::utils::command(
+        Command::new("./emsdk")
+            .arg("install")
+            .arg(EMSDK_VERSION)
+            .current_dir(&emsdk_source_path),
+        "Emscripten SDK installation",
+    )?;
+
+    crate::utils::command(
+        Command::new("./emsdk")
+            .arg("activate")
+            .arg(EMSDK_VERSION)
+            .current_dir(&emsdk_source_path),
+        "Emscripten SDK activation",
+    )?;
+
+    log::warn!(
+        "run 'source {}emsdk_env.sh' to finish the emsdk installation",
+        emsdk_source_path.display()
+    );
+
+    Ok(())
+}
+
+/// The LLVM target directory default path.
+pub fn directory_target_llvm(target_env: crate::target_env::TargetEnv) -> PathBuf {
+    crate::llvm_path::DIRECTORY_LLVM_TARGET
+        .get_or_init(|| PathBuf::from(format!("./target-llvm/{}/", target_env)))
+        .clone()
+}
@@ -0,0 +1,158 @@
+pub mod common;
+
+use std::process::Command;
+
+use assert_cmd::prelude::*;
+
+/// This test verifies that the LLVM repository can be successfully cloned, built, and cleaned.
+#[test]
+fn clone_build_and_clean() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("build")
+        .arg("--llvm-projects")
+        .arg("clang")
+        .arg("--llvm-projects")
+        .arg("lld")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("builtins")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clean")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// This test verifies that the LLVM repository can be successfully cloned, built, and cleaned
+/// with 2-staged build using MUSL as sysroot.
+#[test]
+#[cfg(target_os = "linux")]
+fn clone_build_and_clean_musl() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .arg("clone")
+        .current_dir(test_dir.path())
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .arg("--target-env")
+        .arg("musl")
+        .arg("build")
+        .arg("--llvm-projects")
+        .arg("clang")
+        .arg("--llvm-projects")
+        .arg("lld")
+        .current_dir(test_dir.path())
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("builtins")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clean")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// This test verifies that the LLVM repository can be successfully cloned and built in debug mode
+/// with tests and coverage enabled.
+#[test]
+fn debug_build_with_tests_coverage() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("build")
+        .arg("--enable-coverage")
+        .arg("--enable-tests")
+        .arg("--build-type")
+        .arg("Debug")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// This test verifies that the LLVM repository can be successfully built with address sanitizer.
+#[test]
+fn build_with_sanitizers() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("build")
+        .arg("--sanitizer")
+        .arg("Address")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// Tests the clone, build, and clean process of the LLVM repository for the emscripten target.
+#[test]
+#[cfg(any(target_os = "linux", target_os = "macos"))]
+fn clone_build_and_clean_emscripten() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+    let command = Command::cargo_bin(common::REVIVE_LLVM)?;
+    let program = command.get_program().to_string_lossy();
+    let emsdk_wrapped_build_command = format!(
+        "{program} --target-env emscripten clone && \
+        source {}emsdk_env.sh && \
+        {program} --target-env emscripten build --llvm-projects clang --llvm-projects lld",
+        revive_llvm_builder::LLVMPath::DIRECTORY_EMSDK_SOURCE,
+    );
+
+    Command::new("sh")
+        .arg("-c")
+        .arg(emsdk_wrapped_build_command)
+        .current_dir(test_dir.path())
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .arg("clean")
+        .current_dir(test_dir.path())
+        .assert()
+        .success();
+
+    Ok(())
+}
@@ -0,0 +1,48 @@
+pub mod common;
+
+use std::process::Command;
+
+use assert_cmd::prelude::*;
+
+/// This test verifies that after cloning the LLVM repository, checking out a specific branch
+/// or reference works as expected.
+#[test]
+fn checkout_after_clone() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("checkout")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// This test verifies that after cloning the LLVM repository, checking out a specific branch
+/// or reference with the `--force` option works as expected.
+#[test]
+fn force_checkout() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("checkout")
+        .arg("--force")
+        .assert()
+        .success();
+
+    Ok(())
+}
@@ -0,0 +1,36 @@
+pub mod common;
+
+use std::process::Command;
+
+use assert_cmd::prelude::*;
+
+/// This test verifies that the LLVM repository can be successfully cloned using a specific branch
+/// and reference.
+#[test]
+fn clone() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .assert()
+        .success();
+
+    Ok(())
+}
+
+/// This test verifies that the LLVM repository can be successfully cloned using a specific branch
+/// and reference with --deep option.
+#[test]
+fn clone_deep() -> anyhow::Result<()> {
+    let test_dir = common::TestDir::with_lockfile(None)?;
+
+    Command::cargo_bin(common::REVIVE_LLVM)?
+        .current_dir(test_dir.path())
+        .arg("clone")
+        .arg("--deep")
+        .assert()
+        .success();
+
+    Ok(())
+}
@@ -0,0 +1,36 @@
+use assert_fs::fixture::FileWriteStr;
+
+pub const REVIVE_LLVM: &str = "revive-llvm";
+pub const REVIVE_LLVM_REPO_URL: &str = "https://github.com/llvm/llvm-project";
+pub const REVIVE_LLVM_REPO_TEST_BRANCH: &str = "release/18.x";
+
+pub struct TestDir {
+    _lockfile: assert_fs::NamedTempFile,
+    path: std::path::PathBuf,
+}
+
+/// Creates a temporary lock file for testing.
+impl TestDir {
+    pub fn with_lockfile(reference: Option<String>) -> anyhow::Result<Self> {
+        let file =
+            assert_fs::NamedTempFile::new(revive_llvm_builder::lock::LLVM_LOCK_DEFAULT_PATH)?;
+        let lock = revive_llvm_builder::Lock {
+            url: REVIVE_LLVM_REPO_URL.to_string(),
+            branch: REVIVE_LLVM_REPO_TEST_BRANCH.to_string(),
+            r#ref: reference,
+        };
+        file.write_str(toml::to_string(&lock)?.as_str())?;
+
+        Ok(Self {
+            path: file
+                .parent()
+                .expect("lockfile parent dir always exists")
+                .into(),
+            _lockfile: file,
+        })
+    }
+
+    pub fn path(&self) -> &std::path::Path {
+        &self.path
+    }
+}
@@ -8,6 +8,7 @@ authors.workspace = true
 description = "Execute revive contracts in a simulated blockchain runtime"

 [features]
+std = ["polkadot-sdk/std"]
 default = ["solidity"]
 solidity = ["revive-solidity", "revive-differential"]

@@ -12,3 +12,6 @@ anyhow = { workspace = true }
 inkwell = { workspace = true, features = ["target-riscv", "no-libffi-linking", "llvm18-0"] }

 revive-common = { workspace = true }
+
+[build-dependencies]
+revive-build-utils = { workspace = true }
@@ -14,7 +14,7 @@ const EXPORTS_BC: &str = "polkavm_exports.bc";
 const EXPORTS_RUST: &str = "polkavm_exports.rs";

 fn compile(source_path: &str, bitcode_path: &str) {
-    let output = Command::new("clang")
+    let output = Command::new(revive_build_utils::llvm_host_tool("clang"))
        .args([
            TARGET_FLAG,
            "-Xclang",
@@ -37,7 +37,7 @@ fn compile(source_path: &str, bitcode_path: &str) {
            source_path,
        ])
        .output()
-        .expect("should be able to invoke C clang");
+        .unwrap_or_else(|error| panic!("failed to execute clang: {}", error));

    assert!(
        output.status.success(),
@@ -59,6 +59,11 @@ fn build_module(source_path: &str, bitcode_path: &str, rust_file: &str) {
 }

 fn main() {
+    println!(
+        "cargo:rerun-if-env-changed={}",
+        revive_build_utils::REVIVE_LLVM_HOST_PREFIX
+    );
+
    build_module(IMPORTS_SOUCE, IMPORTS_BC, IMPORTS_RUST);
    build_module(EXPORTS_SOUCE, EXPORTS_BC, EXPORTS_RUST);

@@ -8,3 +8,6 @@ description = "revive compiler stdlib components"

 [dependencies]
 inkwell = { workspace = true, features = ["target-riscv", "no-libffi-linking", "llvm18-0"] }
+
+[build-dependencies]
+revive-build-utils = { workspace = true }
@@ -1,18 +1,23 @@
 use std::{env, fs, path::Path, process::Command};

 fn main() {
+    println!(
+        "cargo:rerun-if-env-changed={}",
+        revive_build_utils::REVIVE_LLVM_HOST_PREFIX
+    );
+
    let lib = "stdlib.bc";
    let out_dir = env::var_os("OUT_DIR").expect("env should have $OUT_DIR");
    let bitcode_path = Path::new(&out_dir).join(lib);
-
-    let output = Command::new("llvm-as")
+    let llvm_as = revive_build_utils::llvm_host_tool("llvm-as");
+    let output = Command::new(llvm_as)
        .args([
            "-o",
            bitcode_path.to_str().expect("$OUT_DIR should be UTF-8"),
            "stdlib.ll",
        ])
        .output()
-        .expect("should be able to invoke llvm-as");
+        .unwrap_or_else(|error| panic!("failed to execute llvm-as: {}", error));

    assert!(
        output.status.success(),
@@ -0,0 +1,65 @@
+[advisories]
+yanked = "warn"
+ignore = [
+    #"RUSTSEC-0000-0000",
+]
+
+[licenses]
+allow = [
+    #"Apache-2.0 WITH LLVM-exception",
+    "MIT",
+    "Apache-2.0",
+    "ISC",
+    "Unlicense",
+    "MPL-2.0",
+    "Unicode-DFS-2016",
+    "Unicode-3.0",
+    "CC0-1.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "Zlib",
+    "LGPL-3.0",
+]
+confidence-threshold = 0.8
+exceptions = [
+    # Each entry is the crate and version constraint, and its specific allow
+    # list
+    #{ allow = ["Zlib"], name = "adler32", version = "*" },
+]
+
+unused-allowed-license = "allow"
+
+[licenses.private]
+ignore = false
+registries = [
+    #"https://sekretz.com/registry
+]
+
+[bans]
+multiple-versions = "warn"
+wildcards = "allow"
+highlight = "all"
+workspace-default-features = "allow"
+external-default-features = "allow"
+allow = [
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+# List of crates to deny
+deny = [
+    # Each entry the name of a crate and a version range. If version is
+    # not specified, all versions will be matched.
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+
+skip = [
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+skip-tree = [
+    #{ name = "ansi_term", version = "=0.11.0", depth = 20 },
+]
+
+[sources]
+unknown-registry = "deny"
+unknown-git = "allow"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+allow-git = []
@@ -1,69 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-INSTALL_DIR="${PWD}/llvm18.0-emscripten"
-mkdir -p "${INSTALL_DIR}"
-
-# Check if EMSDK_ROOT is defined
-if [ -z "${EMSDK_ROOT:-}" ]; then
-    echo "Error: EMSDK_ROOT is not defined."
-    echo "Please set the EMSDK_ROOT environment variable to the root directory of your Emscripten SDK."
-    exit 1
-fi
-
-source "${EMSDK_ROOT}/emsdk_env.sh"
-
-LLVM_SRC="${PWD}/llvm-project"
-LLVM_NATIVE="${PWD}/build/llvm-tools"
-LLVM_WASM="${PWD}/build/llvm-wasm"
-
-./clone-llvm.sh "${LLVM_SRC}"
-
-# Cross-compiling LLVM requires a native build of "llvm-tblgen", "clang-tblgen" and "llvm-config"
-if [ ! -d "${LLVM_NATIVE}" ]; then
-    cmake -G Ninja \
-        -S "${LLVM_SRC}/llvm" \
-        -B "${LLVM_NATIVE}" \
-        -DCMAKE_BUILD_TYPE=Release \
-        -DLLVM_TARGETS_TO_BUILD=WebAssembly \
-        -DLLVM_ENABLE_PROJECTS="clang"
-fi
-
-cmake --build "${LLVM_NATIVE}" -- llvm-tblgen clang-tblgen llvm-config
-
-if [ ! -d "${LLVM_WASM}" ]; then
-    EMCC_DEBUG=2 \
-    CXXFLAGS="-Dwait4=__syscall_wait4" \
-    LDFLAGS="-lnodefs.js -s NO_INVOKE_RUN -s EXIT_RUNTIME -s INITIAL_MEMORY=64MB -s ALLOW_MEMORY_GROWTH -s \
-        EXPORTED_RUNTIME_METHODS=FS,callMain,NODEFS -s MODULARIZE -s EXPORT_ES6 -s WASM_BIGINT" \
-    emcmake cmake -G Ninja \
-        -S "${LLVM_SRC}/llvm" \
-        -B "${LLVM_WASM}" \
-        -DCMAKE_BUILD_TYPE=Release \
-        -DLLVM_TARGETS_TO_BUILD='RISCV' \
-        -DLLVM_ENABLE_PROJECTS="clang;lld" \
-        -DLLVM_ENABLE_DUMP=OFF \
-        -DLLVM_ENABLE_ASSERTIONS=OFF \
-        -DLLVM_ENABLE_EXPENSIVE_CHECKS=OFF \
-        -DLLVM_ENABLE_BACKTRACES=OFF \
-        -DLLVM_BUILD_TOOLS=OFF \
-        -DLLVM_ENABLE_THREADS=OFF \
-        -DLLVM_BUILD_LLVM_DYLIB=OFF \
-        -DLLVM_INCLUDE_TESTS=OFF \
-        -DLLVM_ENABLE_TERMINFO=Off \
-        -DLLVM_ENABLE_LIBXML2=Off \
-        -DLLVM_ENABLE_ZLIB=Off \
-        -DLLVM_ENABLE_ZSTD=Off \
-        -DLLVM_TABLEGEN="${LLVM_NATIVE}/bin/llvm-tblgen" \
-        -DCLANG_TABLEGEN="${LLVM_NATIVE}/bin/clang-tblgen" \
-        -DCMAKE_INSTALL_PREFIX="${INSTALL_DIR}"
-fi
-
-cmake --build "${LLVM_WASM}"
-cmake --install "${LLVM_WASM}"
-
-cp "${LLVM_NATIVE}/bin/llvm-config" "${INSTALL_DIR}/bin"
-
-echo ""
-echo "LLVM cross-compilation for WebAssembly completed successfully."
@@ -1,7 +0,0 @@
-#! /usr/bin/env bash
-
-CONTAINER=revive-builder-debian-x86
-VERSION=latest
-DOCKERFILE=revive-builder-debian.dockerfile
-
-docker build --rm -t ${CONTAINER}:${VERSION} -f ${DOCKERFILE} $@
@@ -1,20 +0,0 @@
-#! /usr/bin/env bash
-
-set -euo pipefail
-
-REVIVE_INSTALL_DIR=$(pwd)/target/release
-while getopts "o:" option ; do
-    case $option in
-    o) # Output directory
-        REVIVE_INSTALL_DIR=$OPTARG
-        ;;
-    \?) echo "Error: Invalid option"
-        exit 1;;
-    esac
-done
-echo "Installing to ${REVIVE_INSTALL_DIR}"
-
-$(pwd)/build-llvm.sh
-export PATH=$(pwd)/llvm18.0/bin:$PATH
-
-make install-revive REVIVE_INSTALL_DIR=${REVIVE_INSTALL_DIR}
@@ -1,14 +0,0 @@
-# syntax=docker/dockerfile:1
-# Dockerfile for building revive in a Debian container.
-FROM debian:12
-RUN <<EOF
-apt-get update
-apt-get install -q -y build-essential cmake make ninja-build python3 \
-    libmpfr-dev libgmp-dev libmpc-dev ncurses-dev \
-    git curl
-EOF
-ARG RUST_VERSION=stable
-RUN <<EOF
-curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain ${RUST_VERSION}
-EOF
-ENV PATH=/root/.cargo/bin:${PATH}
@@ -1,6 +0,0 @@
-#! /usr/bin/env bash
-
-CONTAINER=revive-builder-debian-x86
-VERSION=latest
-
-docker run --rm -v $(pwd):$(pwd) -w $(pwd) ${CONTAINER}:${VERSION} $@
				`@@ -0,0 +1 @@`
				`https://github.com/paritytech/polkadot-sdk/blob/master/docs/contributor/SECURITY.md`