Don't enable RTTI and exception except MySQL 5.7

configure.ac

@@ -195,6 +195,16 @@ AC_DEFUN([CONFIG_OPTION_MYSQL],[
   MYSQL_VERSION="$($ac_mysql_config --version)"
   AC_SUBST(MYSQL_VERSION)
 
+  MYSQL_CXXFLAGS="-fno-implicit-templates -felide-constructors"
+  case "$MYSQL_MAJOR_MINOR_VERSION" in
+  5.7)
+      :
+      ;;
+  *)
+      MYSQL_CXXFLAGS="$MYSQL_CXXFLAGS -fno-exceptions -fno-rtti"
+      ;;
+  esac
+
   if test "${with_libmysqlservices_compat}" = "no"; then
     MYSQL_MAJOR_MINOR_VERSION=["$(echo $MYSQL_VERSION | sed -e 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*[a-z]*\)$/\1.\2/')"]
     case "$MYSQL_MAJOR_MINOR_VERSION" in
@@ -455,7 +465,7 @@ AC_SUBST(DOCUMENT_VERSION)
 AC_SUBST(DOCUMENT_VERSION_FULL)
 
 CFLAGS="$CFLAGS"
-CXXFLAGS="$CXXFLAGS -fno-implicit-templates -fno-exceptions -felide-constructors"
+CXXFLAGS="$CXXFLAGS $MYSQL_CXXFLAGS"
 
 AC_CONFIG_FILES([
   Makefile