Commit 8455563ed86ddb1fc3157e1bf74dc77c1e6aa6bb | zig

author	Sertonix <sertonix@posteo.net> 2026-04-23 10:34:08+02:00
committer	Andrew Kelley <andrew@ziglang.org> 2026-05-26 09:43:39-07:00
log	8455563ed86ddb1fc3157e1bf74dc77c1e6aa6bb
tree	f71b4ae9cd25ece159a29abd51638465de016a86
parent	0ff175b69ef806f421820d33dade7a8163fe3f16

Fix build script compilation when usize is u32

On 32-bit systems usize is not u64 but it was assumed in multiple places
of the build script.

Sometimes using u64 instead of usize since available and used memory can
exceed usize on 32-bit systems (just like totalSystemMemory)

Example errors:

lib/compiler/build_runner.zig:508:26: error: expected type 'usize', found 'u64'
        .available_rss = max_rss,
                         ^~~~~~~
lib/compiler/build_runner.zig:508:26: note: unsigned 32-bit int cannot represent all possible unsigned 64-bit values
referenced by:
    callMain [inlined]: lib/std/start.zig:699:88
    callMainWithArgs [inlined]: lib/std/start.zig:638:20
    posixCallMainAndExit: lib/std/start.zig:590:38
    2 reference(s) hidden; use '-freference-trace=5' to see all references
lib/std/Build/WebServer.zig:849:38: error: expected type 'usize', found 'u64'
    const buf = gpa.realloc(old_buf, new_len) catch @panic("out of memory");
                                     ^~~~~~~
lib/std/Build/WebServer.zig:849:38: note: unsigned 32-bit int cannot represent all possible unsigned 64-bit values
lib/std/mem/Allocator.zig:399:58: note: parameter type declared here
pub fn realloc(self: Allocator, old_mem: anytype, new_n: usize) Error!@TypeOf(old_mem) {
                                                         ^~~~~
build.zig:548:10: error: type 'usize' cannot represent integer value '9300000000'
        .max_rss = 9_300_000_000,
        ~^~~~~~~~~~~~~~~~~~~~~~~
build.zig:778:10: error: type 'usize' cannot represent integer value '8000000000'
        .max_rss = 8_000_000_000,
        ~^~~~~~~~~~~~~~~~~~~~~~~

7 files changed, 15 insertions(+), 15 deletions(-)

lib
- compiler
  - Maker
    WebServer.zig
- std
  - Build.zig
  - Build
    Step.zig
    Step
    Compile.zig
  - elf.zig
test
- src
  - Libc.zig
- tests.zig

lib/compiler/Maker/WebServer.zig+2-2

...	...	@@ -876,8 +876,8 @@ pub fn updateTimeReportRunTest(
876	876	assert(tests.names.len == ns_per_test.len);
877	877	const tests_len: u32 = @intCast(tests.names.len);
878	878
879		const new_len: u64 = len: {
880		var names_len: u64 = 0;
	879	const new_len: usize = len: {
	880	var names_len: usize = 0;
881	881	for (0..tests_len) \|i\| {
882	882	names_len += tests.testName(@intCast(i)).len + 1;
883	883	}

lib/std/Build.zig+5-5

...	...	@@ -692,7 +692,7 @@ pub const ExecutableOptions = struct {
692	692	root_module: *Module,
693	693	version: ?std.SemanticVersion = null,
694	694	linkage: ?std.builtin.LinkMode = null,
695		max_rss: usize = 0,
	695	max_rss: u64 = 0,
696	696	use_llvm: ?bool = null,
697	697	use_lld: ?bool = null,
698	698	zig_lib_dir: ?LazyPath = null,
...	...	@@ -722,7 +722,7 @@ pub fn addExecutable(b: Build, options: ExecutableOptions) Step.Compile {
722	722	pub const ObjectOptions = struct {
723	723	name: []const u8,
724	724	root_module: *Module,
725		max_rss: usize = 0,
	725	max_rss: u64 = 0,
726	726	use_llvm: ?bool = null,
727	727	use_lld: ?bool = null,
728	728	zig_lib_dir: ?LazyPath = null,
...	...	@@ -745,7 +745,7 @@ pub const LibraryOptions = struct {
745	745	name: []const u8,
746	746	root_module: *Module,
747	747	version: ?std.SemanticVersion = null,
748		max_rss: usize = 0,
	748	max_rss: u64 = 0,
749	749	use_llvm: ?bool = null,
750	750	use_lld: ?bool = null,
751	751	zig_lib_dir: ?LazyPath = null,
...	...	@@ -778,7 +778,7 @@ pub fn addLibrary(b: Build, options: LibraryOptions) Step.Compile {
778	778	pub const TestOptions = struct {
779	779	name: []const u8 = "test",
780	780	root_module: *Module,
781		max_rss: usize = 0,
	781	max_rss: u64 = 0,
782	782	filters: []const []const u8 = &.{},
783	783	test_runner: ?Step.Compile.TestRunner = null,
784	784	use_llvm: ?bool = null,
...	...	@@ -819,7 +819,7 @@ pub const AssemblyOptions = struct {
819	819	/// `host` field of the package's `Build` instance.
820	820	target: ResolvedTarget,
821	821	optimize: std.builtin.OptimizeMode,
822		max_rss: usize = 0,
	822	max_rss: u64 = 0,
823	823	zig_lib_dir: ?LazyPath = null,
824	824	};
825	825

lib/std/Build/Step.zig+2-2

...	...	@@ -30,7 +30,7 @@ dependencies: std.ArrayList(*Step),
30	30	/// max_rss value that does not exceed the `max_total_rss` value of the build
31	31	/// runner. This value is configurable on the command line, and defaults to the
32	32	/// total system memory available.
33		max_rss: usize,
	33	max_rss: u64,
34	34
35	35	/// The return address associated with creation of this step that can be useful
36	36	/// to print along with debugging messages.
...	...	@@ -87,7 +87,7 @@ pub const StepOptions = struct {
87	87	name: []const u8,
88	88	owner: *Build,
89	89	first_ret_addr: ?usize = null,
90		max_rss: usize = 0,
	90	max_rss: u64 = 0,
91	91	};
92	92
93	93	pub fn init(options: StepOptions) Step {

lib/std/Build/Step/Compile.zig+1-1

...	...	@@ -269,7 +269,7 @@ pub const Options = struct {
269	269	kind: Kind,
270	270	linkage: ?std.builtin.LinkMode = null,
271	271	version: ?std.SemanticVersion = null,
272		max_rss: usize = 0,
	272	max_rss: u64 = 0,
273	273	filters: []const []const u8 = &.{},
274	274	test_runner: ?TestRunner = null,
275	275	use_llvm: ?bool = null,

lib/std/elf.zig+2-2

...	...	@@ -873,8 +873,8 @@ pub const ProgramHeaderBufferIterator = struct {
873	873	if (it.index >= it.phnum) return null;
874	874	defer it.index += 1;
875	875
876		const size: u64 = if (it.is_64) @sizeOf(Elf64_Phdr) else @sizeOf(Elf32_Phdr);
877		const offset = it.phoff + size * it.index;
	876	const size: usize = if (it.is_64) @sizeOf(Elf64_Phdr) else @sizeOf(Elf32_Phdr);
	877	const offset = @as(usize, @intCast(it.phoff)) + size * it.index;
878	878	var reader = Io.Reader.fixed(it.buf[offset..]);
879	879
880	880	return try takeProgramHeader(&reader, it.is_64, it.endian);

test/src/Libc.zig+1-1

...	...	@@ -11,7 +11,7 @@ pub const Options = struct {
11	11	test_filters: []const []const u8,
12	12	test_target_filters: []const []const u8,
13	13	skip_wasm: bool,
14		max_rss: usize,
	14	max_rss: u64,
15	15	};
16	16
17	17	const TestCase = struct {

test/tests.zig+2-2

...	...	@@ -2467,7 +2467,7 @@ pub const ModuleTestOptions = struct {
2467	2467	skip_linux: bool,
2468	2468	skip_llvm: bool,
2469	2469	skip_libc: bool,
2470		max_rss: usize = 0,
	2470	max_rss: u64 = 0,
2471	2471	no_builtin: bool = false,
2472	2472	sanitize_thread: ?bool = null,
2473	2473	build_options: ?*Step.Options = null,
...	...	@@ -2795,7 +2795,7 @@ const CAbiTestOptions = struct {
2795	2795	skip_darwin: bool,
2796	2796	skip_linux: bool,
2797	2797	skip_llvm: bool,
2798		max_rss: usize = 0,
	2798	max_rss: u64 = 0,
2799	2799	};
2800	2800
2801	2801	pub fn addCAbiTests(b: std.Build, options: CAbiTestOptions) Step {