forked from boostorg/config
K. Noel Belcourt
3bd4d0b6ae
Added an optimization to the -lx unix timeout code. I compute the amount of time the select call should sleep until the "oldest" process times out. This ensures that all processes that timeout will be killed within one second of their expiration. [SVN r39534]
150 lines
4.1 KiB
C++
150 lines
4.1 KiB
C++
// (C) Copyright John Maddock 2001 - 2003.
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// (C) Copyright Darin Adler 2001 - 2002.
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// (C) Copyright Jens Maurer 2001 - 2002.
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// (C) Copyright Beman Dawes 2001 - 2003.
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// (C) Copyright Douglas Gregor 2002.
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// (C) Copyright David Abrahams 2002 - 2003.
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// (C) Copyright Synge Todo 2003.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org for most recent version.
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// GNU C++ compiler setup:
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#if __GNUC__ < 3
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# if __GNUC_MINOR__ == 91
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// egcs 1.1 won't parse shared_ptr.hpp without this:
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# define BOOST_NO_AUTO_PTR
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# endif
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# if __GNUC_MINOR__ < 95
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//
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// Prior to gcc 2.95 member templates only partly
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// work - define BOOST_MSVC6_MEMBER_TEMPLATES
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// instead since inline member templates mostly work.
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//
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# define BOOST_NO_MEMBER_TEMPLATES
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# if __GNUC_MINOR__ >= 9
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# define BOOST_MSVC6_MEMBER_TEMPLATES
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# endif
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# endif
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# if __GNUC_MINOR__ < 96
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# define BOOST_NO_SFINAE
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# endif
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# if __GNUC_MINOR__ <= 97
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# define BOOST_NO_MEMBER_TEMPLATE_FRIENDS
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# define BOOST_NO_OPERATORS_IN_NAMESPACE
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# endif
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# define BOOST_NO_USING_DECLARATION_OVERLOADS_FROM_TYPENAME_BASE
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# define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
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# define BOOST_NO_IS_ABSTRACT
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#elif __GNUC__ == 3
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# if defined (__PATHSCALE__)
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# define BOOST_NO_TWO_PHASE_NAME_LOOKUP
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# define BOOST_NO_IS_ABSTRACT
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# endif
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//
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// gcc-3.x problems:
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//
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// Bug specific to gcc 3.1 and 3.2:
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//
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# if ((__GNUC_MINOR__ == 1) || (__GNUC_MINOR__ == 2))
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# define BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
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# endif
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# if __GNUC_MINOR__ < 4
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# define BOOST_NO_IS_ABSTRACT
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# endif
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#endif
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#if __GNUC__ < 4
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//
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// All problems to gcc-3.x and earlier here:
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//
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#define BOOST_NO_TWO_PHASE_NAME_LOOKUP
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#endif
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#ifndef __EXCEPTIONS
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# define BOOST_NO_EXCEPTIONS
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#endif
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//
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// Threading support: Turn this on unconditionally here (except for
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// those platforms where we can know for sure). It will get turned off again
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// later if no threading API is detected.
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//
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#if !defined(__MINGW32__) && !defined(linux) && !defined(__linux) && !defined(__linux__)
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# define BOOST_HAS_THREADS
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#endif
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//
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// gcc has "long long"
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//
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#define BOOST_HAS_LONG_LONG
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//
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// gcc implements the named return value optimization since version 3.1
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//
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#if __GNUC__ > 3 || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 )
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#define BOOST_HAS_NRVO
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#endif
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//
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// C++0x features
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//
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2)
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// C++0x features are only enabled when -std=c++0x or -std=gnu++0x are
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// passed on the command line, which in turn defines
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// __GXX_EXPERIMENTAL_CXX0X__.
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# if defined(__GXX_EXPERIMENTAL_CXX0X__)
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# define BOOST_HAS_STATIC_ASSERT
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# define BOOST_HAS_VARIADIC_TMPL
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# define BOOST_HAS_RVALUE_REFS
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# define BOOST_HAS_DECLTYPE
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# endif
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#endif
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//
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// Potential C++0x features
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//
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// Variadic templates compiler:
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// http://www.generic-programming.org/~dgregor/cpp/variadic-templates.html
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#ifdef __VARIADIC_TEMPLATES
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# define BOOST_HAS_VARIADIC_TMPL
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#endif
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// ConceptGCC compiler:
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// http://www.generic-programming.org/software/ConceptGCC/
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#ifdef __GXX_CONCEPTS__
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# define BOOST_HAS_CONCEPTS
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# define BOOST_COMPILER "ConceptGCC version " __VERSION__
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#endif
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#ifndef BOOST_COMPILER
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# define BOOST_COMPILER "GNU C++ version " __VERSION__
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#endif
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//
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// versions check:
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// we don't know gcc prior to version 2.90:
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#if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90)
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# error "Compiler not configured - please reconfigure"
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#endif
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//
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// last known and checked version is 4.3 (Pre-release):
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#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 3))
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# if defined(BOOST_ASSERT_CONFIG)
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# error "Unknown compiler version - please run the configure tests and report the results"
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# else
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// we don't emit warnings here anymore since there are no defect macros defined for
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// gcc post 3.4, so any failures are gcc regressions...
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//# warning "Unknown compiler version - please run the configure tests and report the results"
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# endif
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#endif
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