--- configure	Sat Aug 17 12:15:42 2002
+++ configure.orig	Sat Aug 17 12:15:20 2002
@@ -1805,9 +1805,9 @@
 if test -n "$GXX"; then
     # GNU C compiler
     # -Wno-return-type is necessary for Xlib header files on many systems:
-    CFLAGS="-Wall -Wno-return-type -O2 $X_CFLAGS"
+    CFLAGS="$CFLAGS $X_CFLAGS"
     CFLAGS_D="-Wall -Wno-return-type -g -DDEBUG $X_CFLAGS"
-    CXXFLAGS="-Wall -Wno-return-type -O2 $X_CFLAGS"
+    CXXFLAGS="$CXXFLAGS $X_CFLAGS"
     CXXFLAGS_D="-Wall -Wno-return-type -g -DDEBUG $X_CFLAGS"
 else
 if test "`(uname) 2>/dev/null`" = IRIX; then