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      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
     52