build.zig

const std = @import("std");

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

    const lib = b.addSharedLibrary("cart_unoptimised", "src/main.zig", .unversioned);
    lib.use_stage1 = true;
    lib.setBuildMode(mode);
    lib.setTarget(.{
        .cpu_arch = .wasm32,
        .cpu_features_add = std.Target.wasm.featureSet(&.{
            // .bulk_memory,
            // .multivalue,
            // .simd128,
            // .nontrapping_fptoint,
        }),
        .os_tag = .freestanding,
    });
    lib.strip = true;
    lib.import_memory = true;
    lib.initial_memory = 65536;
    lib.max_memory = 65536;
    lib.global_base = 6560;
    lib.stack_size = 8192;
    lib.install();

    const optimise = b.addSystemCommand(&[_][]const u8{
        "wasm-opt",
        "zig-out\\lib\\cart_unoptimised.wasm",
        "-Oz",
        "--strip-debug",
        "--strip-dwarf",
        "--strip-producers",
        // "--enable-bulk-memory",
        "--zero-filled-memory",
        "--output",
        "zig-out\\lib\\cart.wasm",
    });
    optimise.step.dependOn(&lib.step);

    b.default_step.dependOn(&optimise.step);
}