diff options
Diffstat (limited to 'arch/um/Makefile')
| -rw-r--r-- | arch/um/Makefile | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/um/Makefile b/arch/um/Makefile index dbeab15e7bb7..01b97c19a8ba 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -77,7 +77,10 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) KBUILD_CFLAGS += $(KERNEL_DEFINES) -KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,) +# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use +# a lot more stack due to the lack of sharing of stacklots: +KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \ + echo $(call cc-option,-fno-unit-at-a-time); fi ;) PHONY += linux |