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when using -O2 instead of -Os, get rid of the two optimizations that are causing most of the extra bloat. brings kernel size close to the -Os size again

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17679 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2009-09-22 18:00:35 +00:00
parent 915b00a7ed
commit e44638b110
3 changed files with 27 additions and 0 deletions
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9
target/linux/generic-2.6/patches-2.6.28/004-extra_optimization.patch
View File

@@ -1,5 +1,14 @@
--- a/Makefile --- a/Makefile
+++ b/Makefile +++ b/Makefile
@@ -512,7 +512,7 @@ all: vmlinux
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os
else
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch
endif
include $(srctree)/arch/$(SRCARCH)/Makefile
@@ -549,6 +549,9 @@ endif @@ -549,6 +549,9 @@ endif
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS) CHECKFLAGS += $(NOSTDINC_FLAGS)

9
target/linux/generic-2.6/patches-2.6.30/004-extra_optimization.patch
View File

@@ -1,5 +1,14 @@
--- a/Makefile --- a/Makefile
+++ b/Makefile +++ b/Makefile
@@ -529,7 +529,7 @@ all: vmlinux
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os
else
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch
endif
include $(srctree)/arch/$(SRCARCH)/Makefile
@@ -567,6 +567,9 @@ endif @@ -567,6 +567,9 @@ endif
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS) CHECKFLAGS += $(NOSTDINC_FLAGS)

9
target/linux/generic-2.6/patches-2.6.31/004-extra_optimization.patch
View File

@@ -1,5 +1,14 @@
--- a/Makefile --- a/Makefile
+++ b/Makefile +++ b/Makefile
@@ -521,7 +521,7 @@ all: vmlinux
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os
else
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch
endif
include $(srctree)/arch/$(SRCARCH)/Makefile
@@ -559,6 +559,9 @@ endif @@ -559,6 +559,9 @@ endif
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS) CHECKFLAGS += $(NOSTDINC_FLAGS)