libcxx/src/include/config_elast.h

   1 //===----------------------------------------------------------------------===//
   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 _LIBCPP_CONFIG_ELAST
  10 #define _LIBCPP_CONFIG_ELAST
  11
  12 #include <__config>
  13
  14 #if defined(_LIBCPP_MSVCRT_LIKE)
  15 #  include <stdlib.h>
  16 #else
  17 #  include <errno.h>
  18 #endif
  19
  20 // Note: _LIBCPP_ELAST needs to be defined only on platforms
  21 // where strerror/strerror_r can't handle out-of-range errno values.
  22 #if defined(ELAST)
  23 #  define _LIBCPP_ELAST ELAST
  24 #elif defined(__LLVM_LIBC__)
  25 // No _LIBCPP_ELAST needed for LLVM libc
  26 #elif defined(_NEWLIB_VERSION)
  27 #  define _LIBCPP_ELAST __ELASTERROR
  28 #elif defined(__NuttX__)
  29 // No _LIBCPP_ELAST needed on NuttX
  30 #elif defined(__Fuchsia__)
  31 // No _LIBCPP_ELAST needed on Fuchsia
  32 #elif defined(__wasi__)
  33 // No _LIBCPP_ELAST needed on WASI
  34 #elif defined(__EMSCRIPTEN__)
  35 // No _LIBCPP_ELAST needed on Emscripten
  36 #elif defined(__linux__) || _LIBCPP_HAS_MUSL_LIBC
  37 #  define _LIBCPP_ELAST 4095
  38 #elif defined(__APPLE__)
  39 // No _LIBCPP_ELAST needed on Apple
  40 #elif defined(__MVS__)
  41 #  define _LIBCPP_ELAST 1160
  42 #elif defined(_LIBCPP_MSVCRT_LIKE)
  43 #  define _LIBCPP_ELAST (_sys_nerr - 1)
  44 #elif defined(_AIX)
  45 #  define _LIBCPP_ELAST 127
  46 #else
  47 // Warn here so that the person doing the libcxx port has an easier time:
  48 #  warning ELAST for this platform not yet implemented
  49 #endif
  50
  51 #endif // _LIBCPP_CONFIG_ELAST