diff options
| -rw-r--r-- | arch/i386/Makefile | 4 | ||||
| -rw-r--r-- | arch/x86_64/Makefile | 5 |
2 files changed, 8 insertions, 1 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile index 82c38e1acc4d..4c8f1c06f572 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -56,6 +56,10 @@ cflags-$(CONFIG_X86_ELAN) += -march=i486 GCC_VERSION := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) cflags-$(CONFIG_REGPARM) += $(shell if [ $(GCC_VERSION) -ge 0300 ] ; then echo "-mregparm=3"; fi ;) +# Enable unit-at-a-time mode when possible. It shrinks the +# kernel considerably. +CFLAGS += $(call check_gcc,-funit-at-a-time,) + CFLAGS += $(cflags-y) # Default subarch .c files diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile index 433c143b4045..b85a920ebe7f 100644 --- a/arch/x86_64/Makefile +++ b/arch/x86_64/Makefile @@ -56,7 +56,10 @@ CFLAGS += -Wno-sign-compare ifneq ($(CONFIG_DEBUG_INFO),y) CFLAGS += -fno-asynchronous-unwind-tables endif -#CFLAGS += $(call check_gcc,-funit-at-a-time,) + +# Enable unit-at-a-time mode when possible. It shrinks the +# kernel considerably. +CFLAGS += $(call check_gcc,-funit-at-a-time,) head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o |