diff -Naur bacula-11.0.0.old/autoconf/configure.in bacula-11.0.0/autoconf/configure.in
--- bacula-11.0.0.old/autoconf/configure.in	2021-01-12 12:36:32.689471174 +0100
+++ bacula-11.0.0/autoconf/configure.in	2021-01-12 12:42:02.619511095 +0100
@@ -3271,11 +3271,6 @@
 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"