Messages in this thread | | | Date | Wed, 28 Dec 2005 13:28:15 +0100 | From | Sam Ravnborg <> | Subject | Re: [patch 02/2] allow gcc4 to optimize unit-at-a-time |
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On Wed, Dec 28, 2005 at 07:04:35AM -0500, Jakub Jelinek wrote: > > +# 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: > > +CFLAGS += $(shell if [ $(GCC_VERSION) -lt 0400 ] ; then echo "-fno-unit-at-a-time"; fi ;) > > -fno-unit-at-a-time option has been introduced in GCC 3.4 (and 3.3-hammer > branch). So unless the minimum supported GCC version to compile kernel is > 3.4+, you need to replace > echo "-fno-unit-at-a-time" > with > $(call cc-option,-fno-unit-at-a-time) The test "$(GCC_VERSION) -lt 0400" takes care of this.
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