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Merged
mddelk merged 3 commits into from
Apr 21, 2026
Merged

update to zig 0.15.2 #2

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20e78aa
upgrade to zig 0.15.2
mddelk Nov 8, 2025
205e0f9
finish update
mddelk Apr 21, 2026
d4fdffe
cleanup
mddelk Apr 21, 2026
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2 changes: 1 addition & 1 deletion .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ jobs:
- name: setup zig
uses: mlugg/setup-zig@v2
with:
version: 0.14.1
version: 0.15.2

- name: zig build
run: zig build --summary all
Expand Down
14 changes: 9 additions & 5 deletions CHANGELOG.md
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Expand Up @@ -4,21 +4,25 @@ SPDX-FileCopyrightText: © 2025 Mark Delk <jethrodaniel@gmail.com>
SPDX-License-Identifier: MIT
-->

## [Unreleased]
## Unreleased

## [0.3.0] - 2025-07-15
## `0.4.0` - 2026-04-21

- update to zig 0.15.2

## `0.3.0` - 2025-07-15

- update to zig 0.14.1
- update mruby (still 3.4.0)

## [0.2.0] - 2025-06-01
## `0.2.0` - 2025-06-01

- bump to latest mruby (3.4.0), use upstream instead of a fork

## [0.1.1] - 2025-02-20
## `0.1.1` - 2025-02-20

- fix several small issues

## [0.1.0] - 2025-02-19
## `0.1.0` - 2025-02-19

- initial open-source release
15 changes: 7 additions & 8 deletions README.md
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Expand Up @@ -6,7 +6,7 @@ SPDX-License-Identifier: MIT

# mruby.zig

Build [mruby](https://github.com/mruby/mruby) using [zig](https://ziglang.org) `0.14.1` (no rake!).
Build [mruby](https://github.com/mruby/mruby) using [zig](https://ziglang.org) `0.15.2` (no rake!).

## About

Expand All @@ -18,8 +18,6 @@ This project builds MRuby from source, only using Zig.

This means we emulate MRuby's non-trivial Rake-based build process entirely in Zig.

**NOTE**: We only support zig `0.14.1` at the moment.

## Issues

- Non-standard library gems that use any Ruby logic in their `mrbgem.rake` files aren't supported
Expand All @@ -46,6 +44,8 @@ zig-out/bin/
├── mrbtest
├── mruby
└── mruby-strip

1 directory, 8 files
```

See `zig build -h` for information about everything that's available:
Expand Down Expand Up @@ -79,15 +79,14 @@ zig build mrbtest
```
mrbtest - Embeddable Ruby Test

...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Total: 1647
OK: 1647
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Total: 1659
OK: 1659
KO: 0
Crash: 0
Warning: 0
Skip: 0
Time: 1.07 seconds

Time: 1.4 seconds
```

To use `mirb`, `mruby`, etc:
Expand Down
156 changes: 105 additions & 51 deletions build.zig
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Expand Up @@ -153,7 +153,7 @@ pub fn build(b: *std.Build) !void {
index += 1;

if (index == diagnostics.getLine()) {
var prefix = std.ArrayList(u8).init(b.allocator);
var prefix = std.array_list.Managed(u8).init(b.allocator);
defer prefix.deinit();

var prefix_index: usize = 0;
Expand All @@ -167,7 +167,7 @@ pub fn build(b: *std.Build) !void {
@panic("failed to parse gems.json");
};

var gems = std.ArrayList(Mgem).init(b.allocator);
var gems = std.array_list.Managed(Mgem).init(b.allocator);
defer gems.deinit();

var builtin_gem_map = std.StringHashMap(Mgem).init(b.allocator);
Expand Down Expand Up @@ -204,13 +204,17 @@ pub fn build(b: *std.Build) !void {

const mrbc_exe = b.addExecutable(.{
.name = "mrbc",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
const host_mrbc_exe = b.addExecutable(.{
.name = "host-mrbc",
.target = b.graph.host,
.optimize = optimize,
.root_module = b.createModule(.{
.target = b.graph.host,
.optimize = optimize,
}),
});
{
for ([_]*std.Build.Step.Compile{
Expand Down Expand Up @@ -246,10 +250,13 @@ pub fn build(b: *std.Build) !void {

//

const mruby_lib = b.addStaticLibrary(.{
const mruby_lib = b.addLibrary(.{
.name = "libruby",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.root_source_file = null,
.target = target,
.optimize = optimize,
}),
});
{
const lib = mruby_lib;
Expand Down Expand Up @@ -362,7 +369,7 @@ pub fn build(b: *std.Build) !void {
});
}

var gem_init_content = std.ArrayList(u8).init(b.allocator);
var gem_init_content = std.array_list.Managed(u8).init(b.allocator);
defer gem_init_content.deinit();

try gem_init_content.appendSlice(
Expand Down Expand Up @@ -479,7 +486,7 @@ pub fn build(b: *std.Build) !void {
//
// generate mrbgems/gem_init.c
{
var gem_init_content = std.ArrayList(u8).init(b.allocator);
var gem_init_content = std.array_list.Managed(u8).init(b.allocator);
defer gem_init_content.deinit();

try gem_init_content.appendSlice(
Expand Down Expand Up @@ -595,8 +602,10 @@ pub fn build(b: *std.Build) !void {

const mruby_exe = b.addExecutable(.{
.name = "mruby",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
const exe = mruby_exe;
Expand Down Expand Up @@ -626,8 +635,10 @@ pub fn build(b: *std.Build) !void {

const mirb_exe = b.addExecutable(.{
.name = "mirb",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
const exe = mirb_exe;
Expand Down Expand Up @@ -663,8 +674,10 @@ pub fn build(b: *std.Build) !void {
// zig build mrdb -DMRB_USE_DEBUG_HOOK=true -- sample.rb
const mrdb_exe = b.addExecutable(.{
.name = "mrdb",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
const exe = mrdb_exe;
Expand Down Expand Up @@ -698,8 +711,10 @@ pub fn build(b: *std.Build) !void {

const mruby_strip_exe = b.addExecutable(.{
.name = "mruby-strip",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
const exe = mruby_strip_exe;
Expand Down Expand Up @@ -729,8 +744,10 @@ pub fn build(b: *std.Build) !void {

const mrbtest = b.addExecutable(.{
.name = "mrbtest",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
const exe = mrbtest;
Expand Down Expand Up @@ -772,7 +789,7 @@ pub fn build(b: *std.Build) !void {
}

for (mruby_gems) |gem| {
var gem_test_content = std.ArrayList(u8).init(b.allocator);
var gem_test_content = std.array_list.Managed(u8).init(b.allocator);
defer gem_test_content.deinit();

if (gem.test_rbfiles.len == 0) continue;
Expand Down Expand Up @@ -837,7 +854,7 @@ pub fn build(b: *std.Build) !void {
\\
, .{gem.name})[0..]);

var dependencies = std.ArrayList([]const u8).init(b.allocator);
var dependencies = std.array_list.Managed([]const u8).init(b.allocator);
defer dependencies.deinit();

for (gem.dependencies) |dep|
Expand Down Expand Up @@ -967,7 +984,7 @@ pub fn build(b: *std.Build) !void {

// mrbgems/mruby-test/mrbtest.c
{
var mrbtest_content = std.ArrayList(u8).init(b.allocator);
var mrbtest_content = std.array_list.Managed(u8).init(b.allocator);
defer mrbtest_content.deinit();

try mrbtest_content.appendSlice(
Expand Down Expand Up @@ -1070,6 +1087,23 @@ pub fn build(b: *std.Build) !void {

//

const module = b.addModule("mruby", .{
.root_source_file = b.addWriteFiles().add("src/lib.zig",
\\pub const c = @import("c");
),
// // after translate-c supports bitfields...
// .root_source_file = b.addWriteFiles().add("src/lib.zig",
// \\pub const c = @cImport({
// \\ @cInclude("mruby.h");
// \\ @cInclude("mruby/compile.h");
// \\ @cInclude("mruby/data.h");
// \\ @cInclude("mruby/string.h");
// \\ @cInclude("mruby/variable.h");
// \\ @cInclude("mruby/array.h");
// \\});
// ),
});

const translate_c = b.addTranslateC(.{
// every header needed to use MRuby, add more as needed
.root_source_file = b.addWriteFiles().add("input.c",
Expand All @@ -1085,30 +1119,40 @@ pub fn build(b: *std.Build) !void {
});
{
translate_c.addIncludePath(mruby_dep.path("include"));
}

// TODO: this won't be needed after translate-c supports bitfields
const fix_translation_exe = b.addExecutable(.{
.name = "fix-translation",
.target = b.graph.host,
.optimize = .ReleaseFast,
.root_source_file = b.path("src/fix_translation.zig"),
});
const fix_translation = b.addRunArtifact(fix_translation_exe);
{
fix_translation.addFileArg(translate_c.getOutput());
// const install = b.addInstallFile(translate_c.getOutput(), "input.h");
// const step = b.step("fix-translation-header", "Generate translation input");
// step.dependOn(&install.step);
}
const fixed_translation = fix_translation.captureStdOut();

const module = b.addModule("mruby", .{
.root_source_file = b.addWriteFiles().add("src/lib.zig",
\\pub const c = @import("c");
),
});
{
module.addImport("c", b.createModule(.{
.root_source_file = fixed_translation,
}));
// TODO: this won't be needed after translate-c supports bitfields
const fix_translation_exe = b.addExecutable(.{
.name = "fix-translation",
.root_module = b.createModule(.{
.target = b.graph.host,
.optimize = .ReleaseFast,
.root_source_file = b.path("src/fix_translation.zig"),
}),
});
const fix_translation = b.addRunArtifact(fix_translation_exe);
{
fix_translation.addFileArg(translate_c.getOutput());
}
const fixed_translation = fix_translation.captureStdOut();

// const install = b.addInstallFile(fixed_translation, "fixed-translation.zig");
// const step = b.step("fix-translation", "Generate translation output");
// step.dependOn(&install.step);

module.addAnonymousImport("c", .{
// .root_source_file = fixed_translation,
// TODO: why does this work, but not the above?
.root_source_file = b.addWriteFiles().addCopyFile(fixed_translation, "src/lib.zig"),
});

// TODO: when zig-translate-c has bitfield support
// module.addImport("c", translate_c.createModule());

module.linkLibrary(mruby_lib);
}
Expand All @@ -1117,8 +1161,10 @@ pub fn build(b: *std.Build) !void {

const example_c = b.addExecutable(.{
.name = "example-c",
.target = target,
.optimize = optimize,
.root_module = b.createModule(.{
.target = target,
.optimize = optimize,
}),
});
{
example_c.addCSourceFiles(.{
Expand Down Expand Up @@ -1164,13 +1210,21 @@ pub fn build(b: *std.Build) !void {

const example_zig = b.addExecutable(.{
.name = "example-zig",
.target = target,
.optimize = optimize,
.root_source_file = b.path("src/example.zig"),

// TODO: errors without this... :(
// undefined symbol: etext
// undefined symbol: edata
.use_llvm = true,
.root_module = b.createModule(.{
.root_source_file = b.path("src/example.zig"),
.target = target,
.optimize = optimize,
.imports = &.{
.{ .name = "mruby", .module = module },
},
}),
});
{
example_zig.root_module.addImport("mruby", module);

b.installArtifact(example_zig);

const run = b.addRunArtifact(example_zig);
Expand Down
2 changes: 1 addition & 1 deletion build.zig.zon
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Expand Up @@ -6,7 +6,7 @@
.name = .mruby,
.fingerprint = 0x4a9e46f0ee99188a,
.version = "0.0.0",
.minimum_zig_version = "0.14.1",
.minimum_zig_version = "0.15.2",
.paths = .{
"src",
"build.zig",
Expand Down
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