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build: always disable ubsan with no libc

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This commit is contained in:
Mitchell Hashimoto
2026-04-24 09:51:58 -07:00
parent 1c3a571312
commit 0f7b43e9c7
1 changed files with 10 additions and 8 deletions
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18
src/build/SharedDeps.zig
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@@ -869,14 +869,16 @@ pub fn addSimd(
(b.lazyImport(@import("../../build.zig"), "simdutf") orelse unreachable).noLibcFlags(),
);
// Disable ubsan for Windows C/C++ objects to avoid undefined
// __ubsan_handle_* references. The Zig libraries on Windows don't
// currently bundle a matching UBSan runtime for these objects in
// our build configurations (this affects both MSVC and GNU ABIs).
if (target.result.os.tag == .windows) try flags.appendSlice(b.allocator, &.{
"-fno-sanitize=undefined",
"-fno-sanitize-trap=undefined",
});
// Disable ubsan for C/C++ objects when there is no libc (or on
// Windows) to avoid undefined __ubsan_handle_* references. Debug-
// mode compiles emit these calls and there is no matching UBSan
// runtime available in these configurations.
if (simd_libc == .no_libc or target.result.os.tag == .windows) {
try flags.appendSlice(b.allocator, &.{
"-fno-sanitize=undefined",
"-fno-sanitize-trap=undefined",
});
}
// SIMD C++ files
if (simd_libc == .no_libc) {