diff -Naur bacula-9.6.5.old/autoconf/configure.in bacula-9.6.5/autoconf/configure.in
--- bacula-9.6.5.old/autoconf/configure.in	2020-07-24 09:11:40.890118308 +0200
+++ bacula-9.6.5/autoconf/configure.in	2020-07-24 09:18:37.263451673 +0200
@@ -3088,11 +3088,6 @@
 AC_DEFINE(FDLIBS)
 
 CFLAGS=${CFLAGS--O}
-
-if test x$have_gcc = xyes ; then
-   CPPFLAGS="$CPPFLAGS -x c++ -fno-strict-aliasing -fno-exceptions -fno-rtti"
-   CFLAGS="$CFLAGS -x c++ -fno-strict-aliasing -fno-exceptions -fno-rtti"
-fi
 LDFLAGS=${LDFLAGS--O}
 CPPFLAGS="$CPPFLAGS"
 CFLAGS="$CFLAGS"