1 //===-- Common definitions for LLVM-libc public header files --------------===// 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_COMMON_H 10 #define LLVM_LIBC_COMMON_H 11 12 #ifdef __cplusplus 13 14 #undef __BEGIN_C_DECLS 15 #define __BEGIN_C_DECLS extern "C" { 16 17 #undef __END_C_DECLS 18 #define __END_C_DECLS } 19 20 // Standard C++ doesn't have C99 restrict but GNU C++ has it with __ spelling. 21 #undef __restrict 22 #ifndef __GNUC__ 23 #define __restrict 24 #endif 25 26 #undef _Noreturn 27 #define _Noreturn [[noreturn]] 28 29 #undef _Alignas 30 #define _Alignas alignas 31 32 #undef _Static_assert 33 #define _Static_assert static_assert 34 35 #undef _Alignof 36 #define _Alignof alignof 37 38 #undef _Thread_local 39 #define _Thread_local thread_local 40 41 #undef __NOEXCEPT 42 #define __NOEXCEPT noexcept 43 44 #else // not __cplusplus 45 46 #undef __BEGIN_C_DECLS 47 #define __BEGIN_C_DECLS 48 49 #undef __END_C_DECLS 50 #define __END_C_DECLS 51 52 #undef __restrict 53 #define __restrict restrict // C99 and above support the restrict keyword. 54 55 #undef __NOEXCEPT 56 #define __NOEXCEPT 57 58 #endif // __cplusplus 59 60 #endif // LLVM_LIBC_COMMON_H 61