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kbuild: remove GCC_VERSION 

This was causing some ordering problems.  Remove the up-front evaluation
and just revaluate the compiler version each time we need it.

(The up-front evaluation was problematic because some architectures modify
the value of $(CC)).

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2006-01-08 19:58:51 +01:00
parent 442ce844e1
commit ad14336de8
5 changed files with 8 additions and 16 deletions
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4
Documentation/kbuild/makefiles.txt
View File

@ -1033,9 +1033,9 @@ When kbuild executes the following steps are followed (roughly):
Example:
#arch/i386/Makefile
GCC_VERSION := $(call cc-version)
cflags-y += $(shell \
if [ $(GCC_VERSION) -ge 0300 ] ; then echo "-mregparm=3"; fi ;)
if [ $(call cc-version) -ge 0300 ] ; then \
echo "-mregparm=3"; fi ;)
In the above example -mregparm=3 is only used for gcc version greater
than or equal to gcc 3.0.

4
arch/i386/Makefile
View File

@ -39,8 +39,8 @@ include $(srctree)/arch/i386/Makefile.cpu
# -mregparm=3 works ok on gcc-3.0 and later
#
GCC_VERSION := $(call cc-version)
cflags-$(CONFIG_REGPARM) += $(shell if [ $(GCC_VERSION) -ge 0300 ] ; then echo "-mregparm=3"; fi ;)
cflags-$(CONFIG_REGPARM) += $(shell if [ $(call cc-version) -ge 0300 ] ; then \
echo "-mregparm=3"; fi ;)
# Disable unit-at-a-time mode, it makes gcc use a lot more stack
# due to the lack of sharing of stacklots.

7
arch/ia64/Makefile
View File

@ -25,7 +25,6 @@ cflags-y := -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \
-falign-functions=32 -frename-registers -fno-optimize-sibling-calls
CFLAGS_KERNEL := -mconstant-gp
GCC_VERSION := $(call cc-version)
GAS_STATUS = $(shell $(srctree)/arch/ia64/scripts/check-gas "$(CC)" "$(OBJDUMP)")
CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags "$(CC)" "$(OBJDUMP)" "$(READELF)")
@ -37,11 +36,7 @@ $(error Sorry, you need a newer version of the assember, one that is built from
ftp://ftp.hpl.hp.com/pub/linux-ia64/gas-030124.tar.gz)
endif
ifneq ($(shell if [ $(GCC_VERSION) -lt 0300 ] ; then echo "bad"; fi ;),)
$(error Sorry, your compiler is too old. GCC v2.96 is known to generate bad code.)
endif
ifeq ($(GCC_VERSION),0304)
ifeq ($(call cc-version),0304)
cflags-$(CONFIG_ITANIUM) += -mtune=merced
cflags-$(CONFIG_MCKINLEY) += -mtune=mckinley
endif

6
arch/powerpc/Makefile
View File

@ -76,8 +76,7 @@ LINUXINCLUDE += $(LINUXINCLUDE-y)
CHECKFLAGS += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
ifeq ($(CONFIG_PPC64),y)
GCC_VERSION := $(call cc-version)
GCC_BROKEN_VEC := $(shell if [ $(GCC_VERSION) -lt 0400 ] ; then echo "y"; fi)
GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
@ -189,10 +188,9 @@ TOUT := .tmp_gas_check
# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
# instructions.
# gcc-3.4 and binutils-2.14 are a fatal combination.
GCC_VERSION := $(call cc-version)
checkbin:
@if test "$(GCC_VERSION)" = "0304" ; then \
@if test "$(call cc-version)" = "0304" ; then \
if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
echo 'correctly with gcc-3.4 and your version of binutils.'; \

3
arch/ppc/Makefile
View File

@ -128,10 +128,9 @@ TOUT := .tmp_gas_check
# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
# instructions.
# gcc-3.4 and binutils-2.14 are a fatal combination.
GCC_VERSION := $(call cc-version)
checkbin:
@if test "$(GCC_VERSION)" = "0304" ; then \
@if test "$(call cc-version)" = "0304" ; then \
if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
echo 'correctly with gcc-3.4 and your version of binutils.'; \