diff -uprN glame-2.0.1.orig/configure.ac glame-2.0.1/configure.ac
--- glame-2.0.1.orig/configure.ac	2005-05-14 11:53:46.000000000 +0200
+++ glame-2.0.1/configure.ac	2005-05-14 11:56:48.000000000 +0200
@@ -57,7 +57,10 @@ if test "$swdebug" = "yes" -o "$glame_de
 	glame_debug_gcc_cflags="-O -g"
 elif test "$glame_debug" = "no"; then
 	AC_DEFINE(NDEBUG,, [disable debugging code])
-	glame_debug_gcc_cflags="-O3 -funroll-loops -ffast-math -fomit-frame-pointer"
+	if test -z "$CFLAGS"; then
+		CFLAGS="-O2 -ffast-math"
+	fi
+	glame_debug_gcc_cflags="$CFLAGS"
 else
 	glame_debug_gcc_cflags="-O2 -g -ffast-math"
 fi