AC_LANG_POP(C++)
fi
case $gxx_version in
- 2.*|3.*|4.@<:@0-8@:>@) AC_MSG_ERROR([gcc >= 4.9 is required]);;
+ 2.*|3.*|4.@<:@0-8@:>@*) AC_MSG_ERROR([gcc >= 4.9 is required]);;
esac
if test x$enable_stdlib_debug = xyes ; then
dnl FIXME: for clang/libc++, one should define _LIBCPP_DEBUG2=0