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llvm-project/libcxx/include/limits.h

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[libcxx] Add the missing limits.h header The implementation of [depr.c.headers] in D12747 introduced the necessary C headers into libc++. This patch adds one more missing headers: limits.h We spotted this due to a failing C++03 test [limits_h.pass.cpp] in our libc++ configuration; when the limits.h header is included from a C++ program, it now bypassed the __config header and went directly into the underlying C library's limits.h header, which is problematic for us because we use __config header to configure the underlying C library's behaviour when used from a C++ context. Reviewers: mclow.lists, rsmith Differential revision: https://reviews.llvm.org/D25361 llvm-svn: 283726
2016-10-10 16:38:51 +08:00
// -*- C++ -*-
//===--------------------------- limits.h ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_LIMITS_H
#define _LIBCPP_LIMITS_H
/*
limits.h synopsis
Macros:
CHAR_BIT
SCHAR_MIN
SCHAR_MAX
UCHAR_MAX
CHAR_MIN
CHAR_MAX
MB_LEN_MAX
SHRT_MIN
SHRT_MAX
USHRT_MAX
INT_MIN
INT_MAX
UINT_MAX
LONG_MIN
LONG_MAX
ULONG_MAX
LLONG_MIN // C99
LLONG_MAX // C99
ULLONG_MAX // C99
*/
#include <__config>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
[libcxx] Fix gcc build. Attempt to fix a horrible gcc include order problem. llvm-svn: 283762
2016-10-10 23:56:01 +08:00
#ifndef __GNUC__
[libcxx] Add the missing limits.h header The implementation of [depr.c.headers] in D12747 introduced the necessary C headers into libc++. This patch adds one more missing headers: limits.h We spotted this due to a failing C++03 test [limits_h.pass.cpp] in our libc++ configuration; when the limits.h header is included from a C++ program, it now bypassed the __config header and went directly into the underlying C library's limits.h header, which is problematic for us because we use __config header to configure the underlying C library's behaviour when used from a C++ context. Reviewers: mclow.lists, rsmith Differential revision: https://reviews.llvm.org/D25361 llvm-svn: 283726
2016-10-10 16:38:51 +08:00
#include_next <limits.h>
[libcxx] Fix gcc build. Attempt to fix a horrible gcc include order problem. llvm-svn: 283762
2016-10-10 23:56:01 +08:00
#else
// GCC header limits.h recursively includes itself through another header called
// syslimits.h for some reason. This setup breaks down if we directly
// #include_next GCC's limits.h (reasons not entirely clear to me). Therefore,
// we manually re-create the necessary include sequence below:
// Get the system limits.h defines (force recurse into the next level)
#define _GCC_LIMITS_H_
#define _GCC_NEXT_LIMITS_H
#include_next <limits.h>
// Get the ISO C defines
#undef _GCC_LIMITS_H_
#include_next <limits.h>
#endif // __GNUC__
[libcxx] Add the missing limits.h header The implementation of [depr.c.headers] in D12747 introduced the necessary C headers into libc++. This patch adds one more missing headers: limits.h We spotted this due to a failing C++03 test [limits_h.pass.cpp] in our libc++ configuration; when the limits.h header is included from a C++ program, it now bypassed the __config header and went directly into the underlying C library's limits.h header, which is problematic for us because we use __config header to configure the underlying C library's behaviour when used from a C++ context. Reviewers: mclow.lists, rsmith Differential revision: https://reviews.llvm.org/D25361 llvm-svn: 283726
2016-10-10 16:38:51 +08:00
#endif // _LIBCPP_LIMITS_H