clang/lib/Headers/vadefs.h

   1 /* ===-------- vadefs.h ---------------------------------------------------===
   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
  10 /* Only include this if we are aiming for MSVC compatibility. */
  11 #ifndef _MSC_VER
  12 #include_next <vadefs.h>
  13 #else
  14
  15 #ifndef __clang_vadefs_h
  16 #define __clang_vadefs_h
  17
  18 #include_next <vadefs.h>
  19
  20 /* Override macros from vadefs.h with definitions that work with Clang. */
  21 #ifdef _crt_va_start
  22 #undef _crt_va_start
  23 #define _crt_va_start(ap, param) __builtin_va_start(ap, param)
  24 #endif
  25 #ifdef _crt_va_end
  26 #undef _crt_va_end
  27 #define _crt_va_end(ap)          __builtin_va_end(ap)
  28 #endif
  29 #ifdef _crt_va_arg
  30 #undef _crt_va_arg
  31 #define _crt_va_arg(ap, type)    __builtin_va_arg(ap, type)
  32 #endif
  33
  34 /* VS 2015 switched to double underscore names, which is an improvement, but now
  35  * we have to intercept those names too.
  36  */
  37 #ifdef __crt_va_start
  38 #undef __crt_va_start
  39 #define __crt_va_start(ap, param) __builtin_va_start(ap, param)
  40 #endif
  41 #ifdef __crt_va_end
  42 #undef __crt_va_end
  43 #define __crt_va_end(ap)          __builtin_va_end(ap)
  44 #endif
  45 #ifdef __crt_va_arg
  46 #undef __crt_va_arg
  47 #define __crt_va_arg(ap, type)    __builtin_va_arg(ap, type)
  48 #endif
  49
  50 #endif
  51 #endif