78 lines
2.0 KiB
Plaintext
78 lines
2.0 KiB
Plaintext
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dnl Check for baseline language coverage in the compiler for the C++0x standard.
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# AC_COMPILE_STDCXX_OX
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AC_DEFUN([AC_COMPILE_STDCXX_0X], [
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AC_CACHE_CHECK(if compiler 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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#include <unordered_map>
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#include <unordered_set>
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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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],,
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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 compiler 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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#include <unordered_map>
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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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ac_cv_cxx_compile_cxx0x_cxx=yes, ac_cv_cxx_compile_cxx0x_cxx=no)
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CXXFLAGS="$ac_save_CXXFLAGS"
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AC_LANG_RESTORE
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])
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AC_CACHE_CHECK(if compiler supports C++0x features with -std=gnu++0x,
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ac_cv_cxx_compile_cxx0x_gxx,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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ac_save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS -std=gnu++0x"
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AC_TRY_COMPILE([
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#include <unordered_map>
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template <typename T>
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struct check
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{
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static_assert(sizeof(int) <= sizeof(T), "not big enough");
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};
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typedef check<check<bool>> right_angle_brackets;
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int a;
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decltype(a) b;],,
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ac_cv_cxx_compile_cxx0x_gxx=yes, ac_cv_cxx_compile_cxx0x_gxx=no)
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CXXFLAGS="$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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])
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