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build: update to make our results truly libc free

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This commit is contained in:
Mitchell Hashimoto
2026-04-24 07:01:56 -07:00
parent c559cb1735
commit cbe251c538
8 changed files with 105 additions and 51 deletions
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7
pkg/highway/build.zig
View File

@@ -3,6 +3,7 @@ const std = @import("std");
pub fn build(b: *std.Build) !void {
const target = b.standardTargetOptions(.{});
const optimize = b.standardOptimizeOption(.{});
const no_libc = b.option(bool, "no_libc", "Avoid linking libc when embedding Highway into no-libc builds") orelse false;
const upstream_ = b.lazyDependency("highway", .{});
@@ -22,9 +23,9 @@ pub fn build(b: *std.Build) !void {
.linkage = .static,
});
// Our highway package is free of libc at runtime (uses no symbols)
// but does require libc headers at compile time.
lib.linkLibC();
// Our highway package is free of libc at runtime, so only libc-backed
// consumers should request it explicitly.
if (!no_libc) lib.linkLibC();
lib.addIncludePath(b.path("src/cpp"));
if (upstream_) |upstream| {

26
pkg/simdutf/build.zig
View File

@@ -1,5 +1,19 @@
const std = @import("std");
const no_libc_flags = [_][]const u8{
"-DSIMDUTF_NO_LIBC=1",
"-DSIMDUTF_LIBC_MEMCPY=simdutf_memcpy",
"-DSIMDUTF_LIBC_MEMMOVE=simdutf_memmove",
"-DSIMDUTF_LIBC_MEMSET=simdutf_memset",
"-DSIMDUTF_LIBC_MEMCMP=simdutf_memcmp",
"-DSIMDUTF_LIBC_STRLEN=simdutf_strlen",
"-DSIMDUTF_LIBC_GETENV=simdutf_getenv",
};
pub fn noLibcFlags() []const []const u8 {
return &no_libc_flags;
}
pub fn build(b: *std.Build) !void {
const optimize = b.standardOptimizeOption(.{});
const target = b.standardTargetOptions(.{});
@@ -15,7 +29,7 @@ pub fn build(b: *std.Build) !void {
.linkage = .static,
});
lib.addIncludePath(b.path("vendor"));
lib.linkLibC();
if (!no_libc) lib.linkLibC();
libcpp: {
if (target.result.abi == .msvc) {
// On MSVC, we must not use linkLibCpp because Zig unconditionally
@@ -66,15 +80,7 @@ pub fn build(b: *std.Build) !void {
}
if (no_libc) {
try flags.appendSlice(b.allocator, &.{
"-DSIMDUTF_NO_LIBC=1",
"-DSIMDUTF_LIBC_MEMCPY=simdutf_memcpy",
"-DSIMDUTF_LIBC_MEMMOVE=simdutf_memmove",
"-DSIMDUTF_LIBC_MEMSET=simdutf_memset",
"-DSIMDUTF_LIBC_MEMCMP=simdutf_memcmp",
"-DSIMDUTF_LIBC_STRLEN=simdutf_strlen",
"-DSIMDUTF_LIBC_GETENV=simdutf_getenv",
});
try flags.appendSlice(b.allocator, noLibcFlags());
lib.root_module.addCMacro("SIMDUTF_NO_LIBC", "1");