diff -ruN xmail-1.24-old/Makefile.common xmail-1.24-new/Makefile.common
--- xmail-1.24-old/Makefile.common	2007-09-01 17:30:57.000000000 +0200
+++ xmail-1.24-new/Makefile.common	2007-09-01 17:34:00.000000000 +0200
@@ -24,10 +24,10 @@
 endif
 
 ifeq ($(XMAIL_DEBUG), 1)
-    CFLAGS := $(CFLAGS) -O0 -g
+    CFLAGS := -O0 -g $(CFLAGS)
     STRIP = touch
 else
-    CFLAGS := $(CFLAGS) -O2
+    CFLAGS := -O2 $(CFLAGS)
 endif
 
 OUTDIR = bin
