23e1ed65c2
This is a first step towards splitting up the <__config> header. The <__config> header is large and rather disorganized at this point, leading to confusion and subtle mistakes. For example, we never noticed that the string layout used on arm64 was only enabled for the Clang compiler, as the setting being in the compiler == clang block was probably never intentional. The danger of splitting up the <__config> header is to implicitly use undefined macros that should have been defined prior to their usage, however this can be remediated with -Wundef and we've started moving towards -Wundef enforceable macros.
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___CONFIGURATION_PLATFORM_H
|
|
#define _LIBCPP___CONFIGURATION_PLATFORM_H
|
|
|
|
#include <__config_site>
|
|
|
|
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#if defined(__ELF__)
|
|
# define _LIBCPP_OBJECT_FORMAT_ELF 1
|
|
#elif defined(__MACH__)
|
|
# define _LIBCPP_OBJECT_FORMAT_MACHO 1
|
|
#elif defined(_WIN32)
|
|
# define _LIBCPP_OBJECT_FORMAT_COFF 1
|
|
#elif defined(__wasm__)
|
|
# define _LIBCPP_OBJECT_FORMAT_WASM 1
|
|
#elif defined(_AIX)
|
|
# define _LIBCPP_OBJECT_FORMAT_XCOFF 1
|
|
#else
|
|
// ... add new file formats here ...
|
|
#endif
|
|
|
|
// Need to detect which libc we're using if we're on Linux.
|
|
#if defined(__linux__)
|
|
# include <features.h>
|
|
# if defined(__GLIBC_PREREQ)
|
|
# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
|
|
# else
|
|
# define _LIBCPP_GLIBC_PREREQ(a, b) 0
|
|
# endif // defined(__GLIBC_PREREQ)
|
|
#endif // defined(__linux__)
|
|
|
|
#ifndef __BYTE_ORDER__
|
|
# error \
|
|
"Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform"
|
|
#endif
|
|
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
# define _LIBCPP_LITTLE_ENDIAN
|
|
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
|
|
# define _LIBCPP_BIG_ENDIAN
|
|
#endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
|
|
|
|
#endif // _LIBCPP___CONFIGURATION_PLATFORM_H
|