const std = @import("std");

pub fn build(b: *std.build.Builder) void {
    const mode = b.standardReleaseOptions();

    // Wasm Object file which we will use to infer the features from
    const c_obj = b.addObject("c_obj", null);
    c_obj.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding });
    c_obj.target.cpu_model = .{ .explicit = &std.Target.wasm.cpu.bleeding_edge };
    c_obj.addCSourceFile("foo.c", &.{});
    c_obj.setBuildMode(mode);

    // Wasm library that doesn't have any features specified. This will
    // infer its featureset from other linked object files.
    const lib = b.addSharedLibrary("lib", "main.zig", .unversioned);
    lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding });
    lib.target.cpu_model = .{ .explicit = &std.Target.wasm.cpu.mvp };
    lib.setBuildMode(mode);
    lib.use_llvm = false;
    lib.use_lld = false;
    lib.addObject(c_obj);

    // Verify the result contains the features from the C Object file.
    const check = lib.checkObject(.wasm);
    check.checkStart("name target_features");
    check.checkNext("features 7");
    check.checkNext("+ atomics");
    check.checkNext("+ bulk-memory");
    check.checkNext("+ mutable-globals");
    check.checkNext("+ nontrapping-fptoint");
    check.checkNext("+ sign-ext");
    check.checkNext("+ simd128");
    check.checkNext("+ tail-call");

    const test_step = b.step("test", "Run linker test");
    test_step.dependOn(&check.step);
}