[runtime] Only print out the value of MONO_EXTRA_CONFIGURE_FLAGS when it is set.

diff --git a/autogen.sh b/autogen.sh
index 56070510746a3d4063b849d408551e736700a683..2fe9281e8dd4029b883d0512759afa962128e57b 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -160,8 +160,9 @@ if test -d $srcdir/eglib; then
   echo Done running eglib/autogen.sh ...
 fi
 
-
-echo "MONO_EXTRA_CONFIGURE_FLAGS is $MONO_EXTRA_CONFIGURE_FLAGS"
+if test x$MONO_EXTRA_CONFIGURE_FLAGS != x; then
+       echo "MONO_EXTRA_CONFIGURE_FLAGS is $MONO_EXTRA_CONFIGURE_FLAGS"
+fi
 
 conf_flags="$MONO_EXTRA_CONFIGURE_FLAGS --enable-maintainer-mode --enable-compile-warnings" #--enable-iso-c