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add -funit-at-a-time in trunk/ as well
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2291 3c298f89-4303-0410-b956-a3cf2f4a3e73
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@ -0,0 +1,24 @@
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--- linux-2.4.30/Makefile 2005-10-23 20:52:56.813948000 +0200
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+++ linux.dev/Makefile 2005-10-23 20:53:12.482927250 +0200
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@@ -89,6 +89,8 @@
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# standard CFLAGS
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#
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+check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
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+
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CPPFLAGS := -D__KERNEL__ -I$(HPATH)
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CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
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@@ -100,6 +102,12 @@
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endif
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AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)
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+CFLAGS += $(call check_gcc, -funit-at-a-time,)
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+
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+
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+
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+
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+
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#
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# ROOT_DEV specifies the default root-device when making the image.
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# This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
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--- linux-2.6.12.5/Makefile.old 2005-10-23 22:56:29.017270000 +0200
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+++ linux-2.6.12.5/Makefile 2005-10-23 22:57:23.226138500 +0200
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@@ -533,6 +533,9 @@
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NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
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CHECKFLAGS += $(NOSTDINC_FLAGS)
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+# improve gcc optimization
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+CFLAGS += $(call cc-option,-funit-at-a-time,)
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+
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# warn about C99 declaration after statement
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CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
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@ -24,5 +24,5 @@ config BR2_SOFT_FLOAT
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config BR2_TARGET_OPTIMIZATION
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config BR2_TARGET_OPTIMIZATION
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string
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string
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default "-Os -pipe -mips32 -mtune=mips32"
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default "-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time"
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@ -37,8 +37,8 @@ config BR2_SOFT_FLOAT
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config BR2_TARGET_OPTIMIZATION
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config BR2_TARGET_OPTIMIZATION
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string "Target Optimizations"
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string "Target Optimizations"
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default "-Os -pipe -march=i486" if BR2_i386
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default "-Os -pipe -march=i486 -funit-at-a-time" if BR2_i386
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default "-Os -pipe -mips32 -mtune=mips32" if BR2_mipsel
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default "-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time" if BR2_mipsel
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help
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help
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Optimizations to use when building for the target host.
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Optimizations to use when building for the target host.
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