--- openjdk/hotspot/make/linux/makefiles/gcc.make~	2013-04-15 13:44:59.703968963 +0200
+++ openjdk/hotspot/make/linux/makefiles/gcc.make	2013-04-15 16:22:04.124240511 +0200
@@ -170,7 +170,11 @@
 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 
 
 # The flags to use for an Optimized g++ build
-OPT_CFLAGS += -O3
+ifeq ($(ZERO_BUILD), true)
+  OPT_CFLAGS += -O2 -finline-functions
+else
+  OPT_CFLAGS += -O3
+endif
 
 # Hotspot uses very unstrict aliasing turn this optimization off
 OPT_CFLAGS += -fno-strict-aliasing