Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Thu, 16 Oct 2003 00:50:55 +0200 | From | Adrian Bunk <> | Subject | [2.6 patch] add a config option for -Os compilation |
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Hi Andrew,
the patch below adds a configuration option for -Os (the H8300 symbol is similar to the symbols on other architectures). It includes the results of all detail discussions and applies, compiles and works with 2.6.0-test7-mm1.
Could you add it to -mm?
diffstat output:
Makefile | 8 +++++++- arch/arm/Makefile | 2 -- arch/h8300/Kconfig | 4 ++++ arch/h8300/Makefile | 3 +-- init/Kconfig | 10 ++++++++++ 5 files changed, 22 insertions(+), 5 deletions(-)
TIA Adrian
--- linux-2.6.0-test5-mm4/init/Kconfig.old 2003-09-25 14:38:18.000000000 +0200 +++ linux-2.6.0-test5-mm4/init/Kconfig 2003-09-25 14:47:12.000000000 +0200 @@ -65,6 +65,16 @@ menu "General setup" +config CC_OPTIMIZE_FOR_SIZE + bool "Optimize for size" if EXPERIMENTAL + default y if ARM || H8300 + default n + help + Enabling this option will pass "-Os" instead of "-O2" to gcc + resulting in a smaller kernel. + + If unsure, say N. + config SWAP bool "Support for paging of anonymous memory" depends on MMU --- linux-2.6.0-test5-mm4/Makefile.old 2003-09-25 14:38:18.000000000 +0200 +++ linux-2.6.0-test5-mm4/Makefile 2003-09-25 14:40:26.000000000 +0200 @@ -274,7 +274,7 @@ CPPFLAGS := -D__KERNEL__ -Iinclude \ $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \ +CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common AFLAGS := -D__ASSEMBLY__ @@ -421,6 +421,12 @@ # --------------------------------------------------------------------------- +ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +CFLAGS += -Os +else +CFLAGS += -O2 +endif + ifndef CONFIG_FRAME_POINTER CFLAGS += -fomit-frame-pointer endif --- linux-2.6.0-test5-mm4/arch/arm/Makefile.old 2003-09-25 14:38:18.000000000 +0200 +++ linux-2.6.0-test5-mm4/arch/arm/Makefile 2003-09-25 14:40:47.000000000 +0200 @@ -14,8 +14,6 @@ GZFLAGS :=-9 #CFLAGS +=-pipe -CFLAGS :=$(CFLAGS:-O2=-Os) - ifeq ($(CONFIG_FRAME_POINTER),y) CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog endif --- linux-2.6.0-test5-mm4/arch/h8300/Kconfig.old 2003-09-25 14:43:27.000000000 +0200 +++ linux-2.6.0-test5-mm4/arch/h8300/Kconfig 2003-09-25 14:43:44.000000000 +0200 @@ -5,6 +5,10 @@ mainmenu "uClinux/h8300 (w/o MMU) Kernel Configuration" +config H8300 + bool + default y + config MMU bool default n --- linux-2.6.0-test5-mm4/arch/h8300/Makefile.old 2003-09-25 14:38:18.000000000 +0200 +++ linux-2.6.0-test5-mm4/arch/h8300/Makefile 2003-09-25 14:38:24.000000000 +0200 @@ -34,7 +34,7 @@ ldflags-$(CONFIG_CPU_H8S) := -mh8300self CFLAGS += $(cflags-y) -CFLAGS += -mint32 -fno-builtin -Os +CFLAGS += -mint32 -fno-builtin CFLAGS += -g CFLAGS += -D__linux__ CFLAGS += -DUTS_SYSNAME=\"uClinux\" - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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