1 # Check if $CXX does or can be made to support C++11 by adding switches. 2 # If $CXX explicitly selects a language standard, then 3 # refrain from overriding this choice. 4 AC_DEFUN([AX_CXX_COMPILE_STDCXX_11_NO_OVERRIDE], [dnl 5 AC_PROG_GREP 6 echo $CXX | $GREP -e "-std=" > /dev/null 2> /dev/null 7 if test $? -eq 0; then 8 _AX_CXX_COMPILE_STDCXX_11_DEFAULT 9 else 10 AX_CXX_COMPILE_STDCXX_11([noext], [optional]) 11 fi 12 ]) 13 14 # Check if $CXX supports C++11 by default (without adding switches). 15 # This is a trimmed down version of AX_CXX_COMPILE_STDCXX_11 16 # that reuses its _AX_CXX_COMPILE_STDCXX_testbody_11. 17 AC_DEFUN([_AX_CXX_COMPILE_STDCXX_11_DEFAULT], [dnl 18 AC_LANG_PUSH([C++])dnl 19 ac_success=no 20 AC_CACHE_CHECK(whether $CXX supports C++11 features by default, 21 ax_cv_cxx_compile_cxx11, 22 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_11])], 23 [ax_cv_cxx_compile_cxx11=yes], 24 [ax_cv_cxx_compile_cxx11=no])]) 25 if test x$ax_cv_cxx_compile_cxx11 = xyes; then 26 ac_success=yes 27 fi 28 AC_LANG_POP([C++]) 29 if test x$ac_success = xno; then 30 HAVE_CXX11=0 31 else 32 HAVE_CXX11=1 33 AC_DEFINE(HAVE_CXX11,1, 34 [define if the compiler supports basic C++11 syntax]) 35 fi 36 AC_SUBST(HAVE_CXX11) 37 ]) 38
Indexes created Mon Oct 26 00:26:21 UTC 2026