1 //===-- Including wchar.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_WCHAR_OVERLAY_H 10 #define LLVM_LIBC_HDR_WCHAR_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 <wchar.h header might provide extern inline definitions for few 19 // functions, causing external alias errors. They are guarded by 20 // `__USE_EXTERN_INLINES` macro. We temporarily disable `__USE_EXTERN_INLINES` 21 // macro by defining `__NO_INLINE__` before including <wchar.h>. 22 // And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled 23 // with `_FORTIFY_SOURCE`. 24 25 #ifdef _FORTIFY_SOURCE 26 #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE 27 #undef _FORTIFY_SOURCE 28 #endif 29 30 #ifndef __NO_INLINE__ 31 #define __NO_INLINE__ 1 32 #define LIBC_SET_NO_INLINE 33 #endif 34 35 #ifdef __USE_EXTERN_INLINES 36 #define LIBC_OLD_USE_EXTERN_INLINES 37 #undef __USE_EXTERN_INLINES 38 #endif 39 40 #ifdef __USE_FORTIFY_LEVEL 41 #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL 42 #undef __USE_FORTIFY_LEVEL 43 #define __USE_FORTIFY_LEVEL 0 44 #endif 45 46 #include <wchar.h> 47 48 #ifdef LIBC_OLD_FORTIFY_SOURCE 49 #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE 50 #undef LIBC_OLD_FORTIFY_SOURCE 51 #endif 52 53 #ifdef LIBC_SET_NO_INLINE 54 #undef __NO_INLINE__ 55 #undef LIBC_SET_NO_INLINE 56 #endif 57 58 #ifdef LIBC_OLD_USE_FORTIFY_LEVEL 59 #undef __USE_FORTIFY_LEVEL 60 #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL 61 #undef LIBC_OLD_USE_FORTIFY_LEVEL 62 #endif 63 64 #ifdef LIBC_OLD_USE_EXTERN_INLINES 65 #define __USE_EXTERN_INLINES 66 #undef LIBC_OLD_USE_EXTERN_INLINES 67 #endif 68 69 #endif // LLVM_LIBC_HDR_WCHAR_OVERLAY_H 70