libcxx/include/__configuration/platform.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP___CONFIGURATION_PLATFORM_H
  11 #define _LIBCPP___CONFIGURATION_PLATFORM_H
  12
  13 #include <__config_site>
  14
  15 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
  16 #  pragma GCC system_header
  17 #endif
  18
  19 #if defined(__ELF__)
  20 #  define _LIBCPP_OBJECT_FORMAT_ELF 1
  21 #elif defined(__MACH__)
  22 #  define _LIBCPP_OBJECT_FORMAT_MACHO 1
  23 #elif defined(_WIN32)
  24 #  define _LIBCPP_OBJECT_FORMAT_COFF 1
  25 #elif defined(__wasm__)
  26 #  define _LIBCPP_OBJECT_FORMAT_WASM 1
  27 #elif defined(_AIX)
  28 #  define _LIBCPP_OBJECT_FORMAT_XCOFF 1
  29 #else
  30 // ... add new file formats here ...
  31 #endif
  32
  33 // To detect which libc we're using
  34 #if __has_include(<features.h>)
  35 #  include <features.h>
  36 #endif
  37
  38 #if defined(__linux__)
  39 #  if defined(__GLIBC_PREREQ)
  40 #    define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
  41 #  else
  42 #    define _LIBCPP_GLIBC_PREREQ(a, b) 0
  43 #  endif // defined(__GLIBC_PREREQ)
  44 #endif
  45
  46 #ifndef __BYTE_ORDER__
  47 #  error                                                                                                               \
  48       "Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform"
  49 #endif
  50
  51 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  52 #  define _LIBCPP_LITTLE_ENDIAN
  53 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  54 #  define _LIBCPP_BIG_ENDIAN
  55 #endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  56
  57 #endif // _LIBCPP___CONFIGURATION_PLATFORM_H