WebAssembly build setup As a more secure and portable way.

Changes

5 changed files (+50/-0)

• .tool-versions
  • @@ -16,3 +16,4 @@ # configure, and activate the toolings easily.
    zig 0.14.0 dprint 0.49.0 + bun 1.2.4
• build.zig
  • @@ -40,6 +40,20 @@ // Install include/sood.h
    const install_header = b.addInstallFileWithDir(b.path("src/c.h"), .header, "sood.h"); b.getInstallStep().dependOn(&install_header.step); + // Install WASM build. + const wasm_step = b.step("wasm", "Build WebAssembly module"); + const wasm = b.addExecutable(.{ + .name = "sood", + .root_source_file = b.path("src/wasm.zig"), + .target = b.resolveTargetQuery(.{ .os_tag = .freestanding, .cpu_arch = .wasm32 }), + .optimize = optimize, + }); + // These two options are somehow needed. + // <https://ziggit.dev/t/build-wasm-using-zig-build-system-when-ther-is-no-entry-point-but-function-to-export/4364/3> + wasm.rdynamic = true; + wasm.entry = .disabled; + wasm_step.dependOn(&b.addInstallArtifact(wasm, .{}).step); + // Example (Zig) const example_zig_step = b.step("example-zig", "Build Zig example"); const example_zig = b.addExecutable(.{
• dprint.jsonc
  • @@ -33,5 +33,6 @@ },
    "plugins": [ "https://plugins.dprint.dev/exec-0.5.1.json@492414e39dea4dccc07b4af796d2f4efdb89e84bae2bd4e1e924c0cc050855bf", "https://plugins.dprint.dev/json-0.20.0.wasm", + "https://plugins.dprint.dev/typescript-0.94.0.wasm", ], }
• examples/basic.js (new)
  • @@ -0,0 +1,15 @@
    + // Copyright 2025 Shota FUJI + // + // Licensed under the Zero-Clause BSD License or the Apache License, Version 2.0, at your option. + // You may not use, copy, modify, or distribute this file except according to those terms. You can + // find a copy of the Zero-Clause BSD License at LICENSES/0BSD.txt, and a copy of the Apache License, + // Version 2.0 at LICENSES/Apache-2.0.txt. You may also obtain a copy of the Apache License, Version + // 2.0 at <https://www.apache.org/licenses/LICENSE-2.0> + // + // SPDX-License-Identifier: 0BSD OR Apache-2.0 + + const wasm = Bun.file(new URL("../zig-out/bin/sood.wasm", import.meta.url)); + + const { instance } = await WebAssembly.instantiate(await wasm.arrayBuffer()); + + console.log(instance.exports.sood_add(1, 2));
• src/wasm.zig (new)
  • @@ -0,0 +1,19 @@
    + // Copyright 2025 Shota FUJI + // + // Licensed under the Zero-Clause BSD License or the Apache License, Version 2.0, at your option. + // You may not use, copy, modify, or distribute this file except according to those terms. You can + // find a copy of the Zero-Clause BSD License at LICENSES/0BSD.txt, and a copy of the Apache License, + // Version 2.0 at LICENSES/Apache-2.0.txt. You may also obtain a copy of the Apache License, Version + // 2.0 at <https://www.apache.org/licenses/LICENSE-2.0> + // + // SPDX-License-Identifier: 0BSD OR Apache-2.0 + // + // === + // + // WebAssembly API. + + const sood = @import("lib.zig"); + + export fn sood_add(a: i32, b: i32) i32 { + return sood.add(a, b); + }