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| 1 | //===-- Including fcntl.h in overlay mode ---------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef LLVM_LIBC_HDR_FCNTL_OVERLAY_H |
| 10 | #define LLVM_LIBC_HDR_FCNTL_OVERLAY_H |
| 11 | |
| 12 | #ifdef LIBC_FULL_BUILD |
| 13 | #error "This header should only be included in overlay mode" |
| 14 | #endif |
| 15 | |
| 16 | // Overlay mode |
| 17 | |
| 18 | // glibc <fcntl.h> header might provide extern inline definitions for few |
| 19 | // functions, causing external alias errors. They are guarded by |
| 20 | // `__USE_FORTIFY_LEVEL`, which will be temporarily disabled |
| 21 | // with `_FORTIFY_SOURCE`. |
| 22 | |
| 23 | #ifdef _FORTIFY_SOURCE |
| 24 | #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE |
| 25 | #undef _FORTIFY_SOURCE |
| 26 | #endif |
| 27 | |
| 28 | #ifdef __USE_FORTIFY_LEVEL |
| 29 | #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL |
| 30 | #undef __USE_FORTIFY_LEVEL |
| 31 | #define __USE_FORTIFY_LEVEL 0 |
| 32 | #endif |
| 33 | |
| 34 | #include <fcntl.h> |
| 35 | |
| 36 | #ifdef LIBC_OLD_FORTIFY_SOURCE |
| 37 | #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE |
| 38 | #undef LIBC_OLD_FORTIFY_SOURCE |
| 39 | #endif |
| 40 | |
| 41 | #ifdef LIBC_OLD_USE_FORTIFY_LEVEL |
| 42 | #undef __USE_FORTIFY_LEVEL |
| 43 | #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL |
| 44 | #undef LIBC_OLD_USE_FORTIFY_LEVEL |
| 45 | #endif |
| 46 | |
| 47 | #endif // LLVM_LIBC_HDR_FCNTL_OVERLAY_H |
| 48 |
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