1 //===-- Including stdlib.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_STDLIB_OVERLAY_H 10 #define LLVM_LIBC_HDR_STDLIB_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 <stdlib.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 22 #ifdef _FORTIFY_SOURCE 23 #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE 24 #undef _FORTIFY_SOURCE 25 #endif 26 27 #ifdef __USE_FORTIFY_LEVEL 28 #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL 29 #undef __USE_FORTIFY_LEVEL 30 #define __USE_FORTIFY_LEVEL 0 31 #endif 32 33 #include <stdlib.h> 34 35 #ifdef LIBC_OLD_FORTIFY_SOURCE 36 #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE 37 #undef LIBC_OLD_FORTIFY_SOURCE 38 #endif 39 40 #ifdef LIBC_OLD_USE_FORTIFY_LEVEL 41 #undef __USE_FORTIFY_LEVEL 42 #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL 43 #undef LIBC_OLD_USE_FORTIFY_LEVEL 44 #endif 45 46 #endif 47