How to enable wasm features in build.zig | Zig Programming Language | Page 1

mortal wyvern · 2026-07-29T17:34:49.618Z

This may help you. This was an working example: https://codeberg.org/ScottRedig/zig-wasm-minimal-multithreading/src/branch/main/build.zig

For some reason even doing that example exactly is not working on 0.16, I'll keep looking into this

The build system is so confusing sometimes 🙃 I am building two wasm modules in this build script, they both get passed the same

b.resolveTargetQuery(.{
    .cpu_arch = .wasm32,
    .os_tag = .freestanding,
    .cpu_model = .{ .explicit = &Target.wasm.cpu.mvp },
    .cpu_features_add = Target.wasm.featureSet(&.{
        .atomics,
        .bulk_memory,
        .bulk_memory_opt,
        .simd128,
    }),
})

but only one of their build commands actually has the correct -target wasm32-freestanding -mcpu mvp+atomics+bulk_memory+bulk_memory_opt+simd128 while the other is just -target wasm32-freestanding -mcpu baseline

#How to enable wasm features in build.zig