diff options
Diffstat (limited to 'libc/hdr/stdlib_overlay.h')
| -rw-r--r-- | libc/hdr/stdlib_overlay.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libc/hdr/stdlib_overlay.h b/libc/hdr/stdlib_overlay.h new file mode 100644 index 000000000000..53c32ec0ae33 --- /dev/null +++ b/libc/hdr/stdlib_overlay.h @@ -0,0 +1,46 @@ +//===-- Including stdlib.h in overlay mode --------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIBC_HDR_STDLIB_OVERLAY_H +#define LLVM_LIBC_HDR_STDLIB_OVERLAY_H + +#ifdef LIBC_FULL_BUILD +#error "This header should only be included in overlay mode" +#endif + +// Overlay mode + +// glibc <stdlib.h> header might provide extern inline definitions for few +// functions, causing external alias errors. They are guarded by +// `__USE_FORTIFY_LEVEL`, which will be temporarily disabled. + +#ifdef _FORTIFY_SOURCE +#define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE +#undef _FORTIFY_SOURCE +#endif + +#ifdef __USE_FORTIFY_LEVEL +#define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL +#undef __USE_FORTIFY_LEVEL +#define __USE_FORTIFY_LEVEL 0 +#endif + +#include <stdlib.h> + +#ifdef LIBC_OLD_FORTIFY_SOURCE +#define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE +#undef LIBC_OLD_FORTIFY_SOURCE +#endif + +#ifdef LIBC_OLD_USE_FORTIFY_LEVEL +#undef __USE_FORTIFY_LEVEL +#define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL +#undef LIBC_OLD_USE_FORTIFY_LEVEL +#endif + +#endif |