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1081.1.1
by Monty Taylor
Whole boat-load of build fixes. |
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# =========================================================================== |
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# http://autoconf-archive.cryp.to/ac_cxx_compile_stdcxx_0x.html |
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# =========================================================================== |
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#
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# SYNOPSIS |
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#
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# AC_CXX_COMPILE_STDCXX_0X |
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#
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# DESCRIPTION |
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#
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# Check for baseline language coverage in the compiler for the C++0x |
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# standard. |
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#
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# LICENSE |
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#
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# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com> |
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#
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# Copying and distribution of this file, with or without modification, are |
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# permitted in any medium without royalty provided the copyright notice |
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# and this notice are preserved. |
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AC_DEFUN([AC_CXX_COMPILE_STDCXX_0X], [ |
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AC_CACHE_CHECK(if g++ supports C++0x features without additional flags,
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ac_cv_cxx_compile_cxx0x_native,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([
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template <typename T>
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struct check
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{
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static_assert(sizeof(int) <= sizeof(T), "not big enough");
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};
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typedef check<check<bool>> right_angle_brackets;
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int a;
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decltype(a) b;
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typedef check<int> check_type;
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check_type c;
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check_type&& cr = c;],, |
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ac_cv_cxx_compile_cxx0x_native=yes, ac_cv_cxx_compile_cxx0x_native=no) |
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AC_LANG_RESTORE |
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]) |
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AC_CACHE_CHECK(if g++ supports C++0x features with -std=c++0x, |
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ac_cv_cxx_compile_cxx0x_cxx, |
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[AC_LANG_SAVE |
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AC_LANG_CPLUSPLUS
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ac_save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS -std=c++0x"
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AC_TRY_COMPILE([
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template <typename T>
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struct check
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{
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static_assert(sizeof(int) <= sizeof(T), "not big enough");
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};
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typedef check<check<bool>> right_angle_brackets;
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int a;
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decltype(a) b;
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typedef check<int> check_type;
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check_type c;
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check_type&& cr = c;],, |
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ac_cv_cxx_compile_cxx0x_cxx=yes, ac_cv_cxx_compile_cxx0x_cxx=no) |
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CXXFLAGS="$ac_save_CXXFLAGS" |
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AC_LANG_RESTORE |
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]) |
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AC_CACHE_CHECK(if g++ supports C++0x features with -std=gnu++0x, |
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ac_cv_cxx_compile_cxx0x_gxx, |
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[AC_LANG_SAVE |
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AC_LANG_CPLUSPLUS
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ac_save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS -std=gnu++0x"
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AC_TRY_COMPILE([
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template <typename T>
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struct check
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{
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static_assert(sizeof(int) <= sizeof(T), "not big enough");
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};
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typedef check<check<bool>> right_angle_brackets;
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int a;
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decltype(a) b;
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typedef check<int> check_type;
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check_type c;
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check_type&& cr = c;],, |
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ac_cv_cxx_compile_cxx0x_gxx=yes, ac_cv_cxx_compile_cxx0x_gxx=no) |
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CXXFLAGS="$ac_save_CXXFLAGS" |
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AC_LANG_RESTORE |
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]) |
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if test "$ac_cv_cxx_compile_cxx0x_native" = yes || |
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test "$ac_cv_cxx_compile_cxx0x_cxx" = yes || |
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test "$ac_cv_cxx_compile_cxx0x_gxx" = yes; then |
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AC_DEFINE(HAVE_STDCXX_0X,,[Define if g++ supports C++0x features. ]) |
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fi |
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]) |