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build: build proper metallib for iOS builds

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This commit is contained in:
Mitchell Hashimoto
2024-08-06 16:04:41 -07:00
parent ab7f0c6119
commit 0ec0cc0f95
2 changed files with 40 additions and 23 deletions
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31
build.zig
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@ -1267,29 +1267,18 @@ fn addDeps(
/// Generate Metal shader library
fn addMetallib(
b: *std.Build,
step_: ?*std.Build.Step.Compile,
step: *std.Build.Step.Compile,
) !void {
// Our static state between runs. We memoize so we only compile
// the Metal shaders once.
const MetalState = struct {
var generated: ?std.Build.LazyPath = null;
};
const metal_step = MetallibStep.create(b, .{
.name = "Ghostty",
.target = step.root_module.resolved_target.?,
.sources = &.{b.path("src/renderer/shaders/cell.metal")},
});
const output = MetalState.generated orelse metal: {
const step = MetallibStep.create(b, .{
.name = "Ghostty",
.sources = &.{b.path("src/renderer/shaders/cell.metal")},
});
break :metal step.output;
};
if (step_) |step| {
output.addStepDependencies(&step.step);
step.root_module.addAnonymousImport("ghostty_metallib", .{
.root_source_file = output,
});
}
metal_step.output.addStepDependencies(&step.step);
step.root_module.addAnonymousImport("ghostty_metallib", .{
.root_source_file = metal_step.output,
});
}
/// Generate help files

32
src/build/MetallibStep.zig
View File

@ -11,6 +11,9 @@ pub const Options = struct {
/// The name of the xcframework to create.
name: []const u8,
/// The OS being targeted
target: std.Build.ResolvedTarget,
/// The Metal source files.
sources: []const LazyPath,
};
@ -21,20 +24,45 @@ output: LazyPath,
pub fn create(b: *std.Build, opts: Options) *MetallibStep {
const self = b.allocator.create(MetallibStep) catch @panic("OOM");
const sdk = switch (opts.target.result.os.tag) {
.macos => "macosx",
.ios => "iphoneos",
else => @panic("unsupported metallib OS"),
};
const min_version = if (opts.target.query.os_version_min) |v|
b.fmt("{}", .{v.semver})
else switch (opts.target.result.os.tag) {
.macos => "10.14",
.ios => "11.0",
else => unreachable,
};
const run_ir = RunStep.create(
b,
b.fmt("metal {s}", .{opts.name}),
);
run_ir.addArgs(&.{ "xcrun", "-sdk", "macosx", "metal", "-o" });
run_ir.addArgs(&.{ "xcrun", "-sdk", sdk, "metal", "-o" });
const output_ir = run_ir.addOutputFileArg(b.fmt("{s}.ir", .{opts.name}));
run_ir.addArgs(&.{"-c"});
for (opts.sources) |source| run_ir.addFileArg(source);
switch (opts.target.result.os.tag) {
.ios => run_ir.addArgs(&.{b.fmt(
"-mios-version-min={s}",
.{min_version},
)}),
.macos => run_ir.addArgs(&.{b.fmt(
"-mmacos-version-min={s}",
.{min_version},
)}),
else => {},
}
const run_lib = RunStep.create(
b,
b.fmt("metallib {s}", .{opts.name}),
);
run_lib.addArgs(&.{ "xcrun", "-sdk", "macosx", "metallib", "-o" });
run_lib.addArgs(&.{ "xcrun", "-sdk", sdk, "metallib", "-o" });
const output_lib = run_lib.addOutputFileArg(b.fmt("{s}.metallib", .{opts.name}));
run_lib.addFileArg(output_ir);
run_lib.step.dependOn(&run_ir.step);