1 //===----------------------- config_elast.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 #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(_NEWLIB_VERSION)
25 #define _LIBCPP_ELAST __ELASTERROR
26 #elif defined(__NuttX__)
27 // No _LIBCPP_ELAST needed on NuttX
28 #elif defined(__Fuchsia__)
29 // No _LIBCPP_ELAST needed on Fuchsia
30 #elif defined(__wasi__)
31 // No _LIBCPP_ELAST needed on WASI
32 #elif defined(__linux__) || defined(_LIBCPP_HAS_MUSL_LIBC)
33 #define _LIBCPP_ELAST 4095
34 #elif defined(__APPLE__)
35 // No _LIBCPP_ELAST needed on Apple
36 #elif defined(__sun__)
37 #define _LIBCPP_ELAST ESTALE
38 #elif defined(_LIBCPP_MSVCRT_LIKE)
39 #define _LIBCPP_ELAST (_sys_nerr - 1)
40 #else
41 // Warn here so that the person doing the libcxx port has an easier time:
42 #warning ELAST for this platform not yet implemented
43 #endif
44 
45 #endif // _LIBCPP_CONFIG_ELAST
46