wasm2native

Turn WASI apps into native executables

How it works

The approach is similar to WasmBoxC or RLBox:

WASM file 🠖 WASM to C translator 🠖 platform C compiler + libuvwasi + libuv 🠖 native executable

Prerequisites

CMake
Native toolchain (GCC/Clang/MSVC). Optional: Zig

Usage examples

# Single step:
export CC="clang-12"
export LDFLAGS="-fuse-ld=lld"
./build.sh ./examples/coremark.wasm

# Cross-compile with Zig CC: x86_64-windows-gnu, x86_64-linux-gnu, x86_64-macos-gnu
CC="zig cc -target x86_64-linux-musl" ./build.sh ./examples/coremark.wasm

# Cross-compilation to other architectures
# For full targets list: zig targets | jq .libc
CC="zig cc -target aarch64-linux-musl" ./build.sh ./examples/hello.wasm
qemu-aarch64-static hello.elf
Hello from WebAssembly!

Note: this tool can be used for building WASI apps, not emscripten-generated wasm+js output.

Coremark 1.0 results

Intel(R) Core(TM) i5-10400 CPU @ 2.90GHz, single-thread:

Native: 32475
wasm2c: 27400 (84% of native)

TODO

Big-endian target support
Windows host support
Convert main script to zig
- Allow setting CFLAGS, overriding optimization flags
CI via Github Actions
Get rid of mandatory CMake dependency (write build script for libuv and uvwasi for major platforms)

License

This project is released under The MIT License (MIT)