108 lines
2.9 KiB
Plaintext
108 lines
2.9 KiB
Plaintext
# ============================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_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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# AX_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. This file is offered as-is, without any
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# warranty.
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#serial 7
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AU_ALIAS([AC_CXX_COMPILE_STDCXX_0X], [AX_CXX_COMPILE_STDCXX_0X])
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AC_DEFUN([AX_CXX_COMPILE_STDCXX_0X], [
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AC_CACHE_CHECK(if g++ supports C++0x features without additional flags,
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ax_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 = static_cast<check_type&&>(c);],,
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ax_cv_cxx_compile_cxx0x_native=yes, ax_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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ax_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 = static_cast<check_type&&>(c);],,
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ax_cv_cxx_compile_cxx0x_cxx=yes, ax_cv_cxx_compile_cxx0x_cxx=no)
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CXXFLAGS="$ac_save_CXXFLAGS"
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AC_LANG_RESTORE
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])
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AC_CACHE_CHECK(if g++ supports C++0x features with -std=gnu++0x,
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ax_cv_cxx_compile_cxx0x_gxx,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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ac_save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS -std=gnu++0x"
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AC_TRY_COMPILE([
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template <typename T>
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struct check
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{
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static_assert(sizeof(int) <= sizeof(T), "not big enough");
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};
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typedef check<check<bool>> right_angle_brackets;
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int a;
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decltype(a) b;
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typedef check<int> check_type;
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check_type c;
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check_type&& cr = static_cast<check_type&&>(c);],,
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ax_cv_cxx_compile_cxx0x_gxx=yes, ax_cv_cxx_compile_cxx0x_gxx=no)
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CXXFLAGS="$ac_save_CXXFLAGS"
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AC_LANG_RESTORE
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])
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if test "$ax_cv_cxx_compile_cxx0x_native" = yes ||
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test "$ax_cv_cxx_compile_cxx0x_cxx" = yes ||
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test "$ax_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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])
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