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Add c++11 m4 check.

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This commit is contained in:
Davi Reis 2014-06-06 13:44:33 -07:00
parent 8230f935c4
commit dc45060090
2 changed files with 27 additions and 1 deletions
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4
configure.ac
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@ -39,8 +39,10 @@ AC_ENABLE_CXXMPH
if test x$cxxmph = xtrue; then
AC_COMPILE_STDCXX_0X
if test x$ac_cv_cxx_compile_cxx0x_native = "xno"; then
if test x$ac_cv_cxx_compile_cxx0x_cxx = "xyes"; then
if test x$ac_cv_cxx_compile_cxx11_cxx = "xyes"; then
CXXFLAGS="$CXXFLAGS -std=c++11"
elif test x$ac_cv_cxx_compile_cxx0x_cxx = "xyes"; then
CXXFLAGS="$CXXFLAGS -std=c++0x"
elif test x$ac_cv_cxx_compile_cxx0x_gxx = "xyes"; then
CXXFLAGS="$CXXFLAGS -std=gnu++0x"
else

24
m4/cxx0x.m4
View File

@ -23,6 +23,30 @@ AC_DEFUN([AC_COMPILE_STDCXX_0X], [
AC_LANG_RESTORE
])
AC_CACHE_CHECK(if compiler supports C++0x features with -std=c++11,
ac_cv_cxx_compile_cxx11_cxx,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=c++11"
AC_TRY_COMPILE([
#include <unordered_map>
template <typename T>
struct check
{
static_assert(sizeof(int) <= sizeof(T), "not big enough");
};
typedef check<check<bool>> right_angle_brackets;
int a;
decltype(a) b;],,
ac_cv_cxx_compile_cxx11_cxx=yes, ac_cv_cxx_compile_cxx11_cxx=no)
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])
AC_CACHE_CHECK(if compiler supports C++0x features with -std=c++0x,
ac_cv_cxx_compile_cxx0x_cxx,
[AC_LANG_SAVE