cns3xxx: sync kernel config
[openwrt/svn-archive/archive.git] / target / linux / generic / patches-2.6.39 / 201-extra_optimization.patch
1 --- a/Makefile
2 +++ b/Makefile
3 @@ -543,9 +543,9 @@ endif # $(dot-config)
4 all: vmlinux
5
6 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
7 -KBUILD_CFLAGS += -Os
8 +KBUILD_CFLAGS += -Os -fno-caller-saves
9 else
10 -KBUILD_CFLAGS += -O2
11 +KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
12 endif
13
14 include $(srctree)/arch/$(SRCARCH)/Makefile
15 @@ -600,6 +600,9 @@ endif
16 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
17 CHECKFLAGS += $(NOSTDINC_FLAGS)
18
19 +# improve gcc optimization
20 +CFLAGS += $(call cc-option,-funit-at-a-time,)
21 +
22 # warn about C99 declaration after statement
23 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
24