Compile polkadot-runtime both for Wasm ad native, allowing for testing and direct usage.

substrate/native-runtime/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "native-runtime"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+
+[features]
+default = ["with-std"]
+with-std = []
+without-std = []
+
+[dependencies]
+runtime-support = { path = "./support", version = "0.1" }

substrate/native-runtime/src

@@ -0,0 +1 @@
+../wasm-runtime/polkadot/src

substrate/native-runtime/support/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "runtime-support"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+
+[features]
+strict = []

substrate/native-runtime/support/src/lib.rs

@@ -0,0 +1,10 @@
+pub use std::vec::Vec;
+
+pub fn storage(_key: &[u8]) -> Vec<u8> { vec![] }
+pub fn storage_into<T: Sized>(_key: &[u8]) -> Option<T> { None }
+pub fn set_storage(_key: &[u8], _value: &[u8]) {}
+
+#[macro_export]
+macro_rules! impl_stubs {
+	($( $name:ident ),*) => {}
+}