Koute
2610450a18
Our executor currently only supports the WASM MVP feature set, however nowadays when compiling WASM the Rust compiler has more features enabled by default. We do set the `-C target-cpu=mvp` flag to make sure that *our* code gets compiled in a way that is compatible with our executor, however this doesn't affect Rust's standard library crates (`std`, `core` and `alloc`) which are by default precompiled and still can make use of these extra features. So in this PR we force the compiler to also compile the standard library crates for us to make sure that they also only use the MVP features. I've added the `WASM_BUILD_STD` environment variable which can be used to disable this behavior if set to `0`. Unfortunately this *will* slow down the compile times when building runtimes, but there isn't much that we can do about that. Fixes https://github.com/paritytech/polkadot-sdk/issues/1755 --------- Co-authored-by: Bastian Köcher <git@kchr.de>
Substrate
Substrate is a next-generation framework for blockchain innovation 🚀.
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Head to docs.substrate.io and follow the installation
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License
- Substrate Primitives (
sp-*), Frame (frame-*) and the pallets (pallets-*), binaries (/bin) and all other utilities are licensed under Apache 2.0. - Substrate Client (/client/*/sc-*) is licensed under GPL v3.0 with a classpath linking exception.
The reason for the split-licensing is to ensure that for the vast majority of teams using Substrate to create feature-chains, then all changes can be made entirely in Apache2-licensed code, allowing teams full freedom over what and how they release and giving licensing clarity to commercial teams.
In the interests of the community, we require any deeper improvements made to Substrate's core logic (e.g. Substrate's internal consensus, crypto or database code) to be contributed back so everyone can benefit.