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8cedff10a1
An issue I often see in codebases compiled for unusual platforms is that header search paths are specified manually and are subtly wrong. For example, people will manually add `-isystem <some-toolchain>/usr/include`, which ends up messing up the layering of header search paths required by libc++ (because the C Standard Library now appears *before* libc++ in the search paths). Without this patch, this will end up causing compilation errors that are pretty inscrutable. This patch aims to improve the user experience by diagnosing this issue explicitly. In all cases I can think of, I would expect that a compilation error occur if these header search paths are not layered properly. This should only provide an explicit diagnostic instead of failing due to seemingly unrelated compilation errors. Differential Revision: https://reviews.llvm.org/D131441
268 lines
4.1 KiB
C++
268 lines
4.1 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_CINTTYPES
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#define _LIBCPP_CINTTYPES
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/*
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cinttypes synopsis
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This entire header is C99 / C++0X
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#include <cstdint> // <cinttypes> includes <cstdint>
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Macros:
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PRId8
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PRId16
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PRId32
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PRId64
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PRIdLEAST8
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PRIdLEAST16
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PRIdLEAST32
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PRIdLEAST64
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PRIdFAST8
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PRIdFAST16
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PRIdFAST32
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PRIdFAST64
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PRIdMAX
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PRIdPTR
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PRIi8
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PRIi16
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PRIi32
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PRIi64
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PRIiLEAST8
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PRIiLEAST16
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PRIiLEAST32
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PRIiLEAST64
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PRIiFAST8
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PRIiFAST16
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PRIiFAST32
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PRIiFAST64
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PRIiMAX
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PRIiPTR
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PRIo8
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PRIo16
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PRIo32
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PRIo64
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PRIoLEAST8
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PRIoLEAST16
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PRIoLEAST32
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PRIoLEAST64
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PRIoFAST8
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PRIoFAST16
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PRIoFAST32
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PRIoFAST64
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PRIoMAX
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PRIoPTR
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PRIu8
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PRIu16
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PRIu32
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PRIu64
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PRIuLEAST8
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PRIuLEAST16
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PRIuLEAST32
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PRIuLEAST64
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PRIuFAST8
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PRIuFAST16
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PRIuFAST32
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PRIuFAST64
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PRIuMAX
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PRIuPTR
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PRIx8
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PRIx16
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PRIx32
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PRIx64
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PRIxLEAST8
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PRIxLEAST16
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PRIxLEAST32
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PRIxLEAST64
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PRIxFAST8
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PRIxFAST16
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PRIxFAST32
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PRIxFAST64
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PRIxMAX
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PRIxPTR
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PRIX8
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PRIX16
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PRIX32
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PRIX64
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PRIXLEAST8
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PRIXLEAST16
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PRIXLEAST32
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PRIXLEAST64
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PRIXFAST8
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PRIXFAST16
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PRIXFAST32
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PRIXFAST64
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PRIXMAX
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PRIXPTR
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SCNd8
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SCNd16
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SCNd32
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SCNd64
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SCNdLEAST8
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SCNdLEAST16
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SCNdLEAST32
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SCNdLEAST64
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SCNdFAST8
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SCNdFAST16
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SCNdFAST32
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SCNdFAST64
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SCNdMAX
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SCNdPTR
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SCNi8
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SCNi16
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SCNi32
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SCNi64
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SCNiLEAST8
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SCNiLEAST16
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SCNiLEAST32
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SCNiLEAST64
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SCNiFAST8
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SCNiFAST16
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SCNiFAST32
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SCNiFAST64
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SCNiMAX
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SCNiPTR
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SCNo8
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SCNo16
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SCNo32
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SCNo64
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SCNoLEAST8
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SCNoLEAST16
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SCNoLEAST32
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SCNoLEAST64
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SCNoFAST8
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SCNoFAST16
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SCNoFAST32
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SCNoFAST64
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SCNoMAX
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SCNoPTR
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SCNu8
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SCNu16
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SCNu32
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SCNu64
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SCNuLEAST8
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SCNuLEAST16
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SCNuLEAST32
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SCNuLEAST64
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SCNuFAST8
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SCNuFAST16
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SCNuFAST32
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SCNuFAST64
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SCNuMAX
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SCNuPTR
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SCNx8
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SCNx16
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SCNx32
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SCNx64
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SCNxLEAST8
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SCNxLEAST16
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SCNxLEAST32
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SCNxLEAST64
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SCNxFAST8
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SCNxFAST16
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SCNxFAST32
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SCNxFAST64
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SCNxMAX
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SCNxPTR
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namespace std
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{
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Types:
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imaxdiv_t
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intmax_t imaxabs(intmax_t j);
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imaxdiv_t imaxdiv(intmax_t numer, intmax_t denom);
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intmax_t strtoimax(const char* restrict nptr, char** restrict endptr, int base);
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uintmax_t strtoumax(const char* restrict nptr, char** restrict endptr, int base);
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intmax_t wcstoimax(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
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uintmax_t wcstoumax(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
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} // std
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*/
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#include <__assert> // all public C++ headers provide the assertion handler
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#include <__config>
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#include <cstdint>
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#include <inttypes.h>
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#ifndef _LIBCPP_INTTYPES_H
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# error <cinttypes> tried including <inttypes.h> but didn't find libc++'s <inttypes.h> header. \
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This usually means that your header search paths are not configured properly. \
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The header search paths should contain the C++ Standard Library headers before \
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any C Standard Library, and you are probably using compiler flags that make that \
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not be the case.
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#endif
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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using ::imaxdiv_t _LIBCPP_USING_IF_EXISTS;
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using ::imaxabs _LIBCPP_USING_IF_EXISTS;
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using ::imaxdiv _LIBCPP_USING_IF_EXISTS;
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using ::strtoimax _LIBCPP_USING_IF_EXISTS;
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using ::strtoumax _LIBCPP_USING_IF_EXISTS;
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using ::wcstoimax _LIBCPP_USING_IF_EXISTS;
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using ::wcstoumax _LIBCPP_USING_IF_EXISTS;
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_CINTTYPES
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