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add libclang.cpu.a

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This commit is contained in:
henderkes
2026-06-09 12:27:45 +07:00
parent 5747a5661e
commit 3b8abda8c9
2 changed files with 50 additions and 1 deletions
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48
src/Package/Artifact/llvm_compiler_rt.php
View File

@@ -19,6 +19,8 @@ use StaticPHP\Runtime\SystemTarget;
* Builds the compiler-rt bits zig ships without — libclang_rt.profile.a (PGO instrumentation)
* and clang_rt.crtbegin.o/crtend.o (__dso_handle for shared libs). Target-arch specific:
* libs land in PKG_ROOT_PATH/zig/lib/{triple}.
* Also builds libclang_rt.cpu_model.a (__cpu_model / __cpu_indicator_init, the libgcc-compatible
* globals that __builtin_cpu_supports()/__builtin_cpu_init() reference) for arches that have it.
*/
class llvm_compiler_rt
{
@@ -90,13 +92,18 @@ class llvm_compiler_rt
if (!file_exists($crtBegin) || !file_exists($crtEnd)) {
$this->buildCrtObjects($sourceDir, $crtBegin, $crtEnd, $triple);
}
$cpuModelLib = "{$libDir}/libclang_rt.cpu_model.a";
if (self::cpuModelArch($triple) !== null && !file_exists($cpuModelLib)) {
$this->buildCpuModelBuiltins($sourceDir, $cpuModelLib, $triple);
}
}
public function isBuilt(string $libDir): bool
{
return file_exists("{$libDir}/libclang_rt.profile.a")
&& file_exists("{$libDir}/clang_rt.crtbegin.o")
&& file_exists("{$libDir}/clang_rt.crtend.o");
&& file_exists("{$libDir}/clang_rt.crtend.o")
&& (self::cpuModelArch(basename($libDir)) === null || file_exists("{$libDir}/libclang_rt.cpu_model.a"));
}
private function detectZigLlvmVersion(): ?string
@@ -144,4 +151,43 @@ class llvm_compiler_rt
shell()->exec("zig cc {$cflags} -o " . escapeshellarg($dst) . ' ' . escapeshellarg($src));
}
}
/**
* Build libclang_rt.cpu_model.a, provides
* the globals that __builtin_cpu_supports() reference.
*/
private function buildCpuModelBuiltins(string $srcRoot, string $libPath, string $triple): void
{
$builtins = "{$srcRoot}/lib/builtins";
$family = self::cpuModelArch($triple);
$cpuModelDir = "{$builtins}/cpu_model";
if (is_dir($cpuModelDir)) {
$src = "{$cpuModelDir}/{$family}.c";
$includes = '-I' . escapeshellarg($builtins) . ' -I' . escapeshellarg($cpuModelDir);
} else {
$src = "{$builtins}/cpu_model.c";
$includes = '-I' . escapeshellarg($builtins);
}
if (!is_file($src)) {
throw new BuildFailureException("llvm-compiler-rt: cpu_model source not found for {$triple} under {$builtins}");
}
$objDir = "{$srcRoot}/obj-cpu-model-{$triple}";
f_mkdir($objDir, recursive: true);
$obj = "{$objDir}/cpu_model.o";
$cflags = "-target {$triple} -c -O2 -fPIC {$includes}";
shell()->exec('zig cc ' . $cflags . ' -o ' . escapeshellarg($obj) . ' ' . escapeshellarg($src));
shell()->exec('zig ar rcs ' . escapeshellarg($libPath) . ' ' . escapeshellarg($obj));
}
private static function cpuModelArch(string $triple): ?string
{
$arch = explode('-', $triple)[0];
return match (true) {
in_array($arch, ['x86_64', 'amd64', 'i386', 'i686', 'x86'], true) => 'x86',
in_array($arch, ['aarch64', 'arm64'], true) => 'aarch64',
str_starts_with($arch, 'riscv') => 'riscv',
default => null,
};
}
}

3
src/globals/scripts/zig-cc.sh
View File

@@ -73,6 +73,9 @@ fi
if [[ $IS_LINK -eq 1 && $NEED_CRT -eq 1 && -n "$RT_DIR" && -f "$RT_DIR/clang_rt.crtbegin.o" && -f "$RT_DIR/clang_rt.crtend.o" ]]; then
PARSED_ARGS+=("$RT_DIR/clang_rt.crtbegin.o" "$RT_DIR/clang_rt.crtend.o")
fi
if [[ $IS_LINK -eq 1 && -n "$RT_DIR" && -f "$RT_DIR/libclang_rt.cpu_model.a" ]]; then
PARSED_ARGS+=("$RT_DIR/libclang_rt.cpu_model.a")
fi
[[ -n "$SPC_TARGET" ]] && TARGET="-target $SPC_TARGET" || TARGET=""