diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d60bfaf425a3..c05f66fd855f 100644 --- a/configure.ac +++ b/configure.ac @@ -6780,6 +6780,19 @@ if test "$GCC" = yes; then fi AC_SUBST([HAVE_GCC_FNO_SIZED_DEALLOCATION]) +AC_MSG_CHECKING([whether $CXX_BASE supports C++20 consteval]) +AC_LANG_PUSH([C++]) +save_CXXFLAGS=$CXXFLAGS +CXXFLAGS="$CXXFLAGS $CXXFLAGS_CXX11" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([ + consteval int f() { return 0; } + ])], [ + AC_DEFINE([HAVE_CPP_CONSTEVAL],[1]) + AC_MSG_RESULT([yes]) + ], [AC_MSG_RESULT([no])]) +CXXFLAGS=$save_CXXFLAGS +AC_LANG_POP([C++]) + AC_MSG_CHECKING([whether $CXX_BASE supports C++2a constinit sorted vectors]) AC_LANG_PUSH([C++]) save_CXXFLAGS=$CXXFLAGS |