diff -Naur glame-1.0.2.orig/configure glame-1.0.2.cflags/configure
--- glame-1.0.2.orig/configure	2004-10-15 01:45:17.713874000 -0700
+++ glame-1.0.2.cflags/configure	2004-10-15 01:52:33.089150474 -0700
@@ -1994,7 +1994,10 @@
 #define NDEBUG
 _ACEOF
 
-	glame_debug_gcc_cflags="-O3 -ffast-math -funroll-loops"
+	if test -z "$CFLAGS"; then
+		CFLAGS="-O2 -ffast-math -funroll-loops"
+	fi
+	glame_debug_gcc_cflags="$CFLAGS"
 else
 	if test -z "$CFLAGS"; then
 		CFLAGS="-g -O2 -ffast-math"
diff -Naur glame-1.0.2.orig/configure.ac glame-1.0.2.cflags/configure.ac
--- glame-1.0.2.orig/configure.ac	2004-01-13 11:54:26.000000000 -0800
+++ glame-1.0.2.cflags/configure.ac	2004-10-15 01:51:48.394512522 -0700
@@ -33,7 +33,10 @@
 	glame_debug_gcc_cflags="-g3 -O"
 elif test "$glame_debug" = "no"; then
 	AC_DEFINE(NDEBUG,, [disable debugging code])
-	glame_debug_gcc_cflags="-O3 -ffast-math -funroll-loops"
+	if test -z "$CFLAGS"; then
+		CFLAGS="-O2 -ffast-math"
+	fi
+	glame_debug_gcc_cflags="$CFLAGS"
 else
 	if test -z "$CFLAGS"; then
 		CFLAGS="-g -O2 -ffast-math"