Arjan van de Ven <[email protected]> wrote:
>
> allow gcc4 compilers to optimize unit-at-a-time.
>
> This flag enables gcc to "see" the entire C file before making optimisation
> decisions such as inline, which results in gcc making better decisions. One
> of the immediate effects of this is that static functions that are used only
> once now get inlined.
>
> gcc 3.4 has this flag as well, however gcc 3.x have a problem with inlining
> and stacks and as a result, enabling this flag there would cause excessive
> and unacceptable stack use. This problem is fixed in the gcc 4.x series.
> The x86-64 architecture already enables this feature so it's well tested
> already.
bix:/usr/src/25> make vmlinux
/bin/sh: line 1: [: -lt: unary operator expected
Because GCC_VERSION hasn't been initialised at this stage.
<wonders about the testing status of this one>
Is there any reason why we can't do this?
From: Andrew Morton <[email protected]>
Set GCC_VERSION up-front rather than in arch Makefiles. This reduces ordering
problems and generally consolidates things.
Cc: Sam Ravnborg <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
Makefile | 2 +-
arch/ia64/Makefile | 1 -
arch/parisc/Makefile | 4 ----
arch/powerpc/Makefile | 2 --
arch/ppc/Makefile | 1 -
5 files changed, 1 insertion(+), 9 deletions(-)
diff -puN arch/ia64/Makefile~kbuild-call-gcc_version-earlier arch/ia64/Makefile
--- devel/arch/ia64/Makefile~kbuild-call-gcc_version-earlier 2006-01-07 01:05:39.000000000 -0800
+++ devel-akpm/arch/ia64/Makefile 2006-01-07 01:05:39.000000000 -0800
@@ -25,7 +25,6 @@ cflags-y := -pipe $(EXTRA) -ffixed-r13 -
-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)")
diff -puN arch/parisc/Makefile~kbuild-call-gcc_version-earlier arch/parisc/Makefile
--- devel/arch/parisc/Makefile~kbuild-call-gcc_version-earlier 2006-01-07 01:05:39.000000000 -0800
+++ devel-akpm/arch/parisc/Makefile 2006-01-07 01:05:39.000000000 -0800
@@ -35,10 +35,6 @@ FINAL_LD=$(CROSS_COMPILE)ld --warn-commo
OBJCOPY_FLAGS =-O binary -R .note -R .comment -S
-GCC_VERSION := $(call cc-version)
-ifneq ($(shell if [ -z $(GCC_VERSION) ] ; then echo "bad"; fi ;),)
-$(error Sorry, couldn't find ($(cc-version)).)
-endif
ifneq ($(shell if [ $(GCC_VERSION) -lt 0303 ] ; then echo "bad"; fi ;),)
$(error Sorry, your compiler is too old ($(GCC_VERSION)). GCC v3.3 or above is required.)
endif
diff -puN arch/powerpc/Makefile~kbuild-call-gcc_version-earlier arch/powerpc/Makefile
--- devel/arch/powerpc/Makefile~kbuild-call-gcc_version-earlier 2006-01-07 01:05:39.000000000 -0800
+++ devel-akpm/arch/powerpc/Makefile 2006-01-07 01:05:39.000000000 -0800
@@ -76,7 +76,6 @@ 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 [ $(GCC_VERSION) -lt 0400 ] ; then echo "y"; fi)
ifeq ($(CONFIG_POWER4_ONLY),y)
@@ -189,7 +188,6 @@ 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 \
diff -puN arch/ppc/Makefile~kbuild-call-gcc_version-earlier arch/ppc/Makefile
--- devel/arch/ppc/Makefile~kbuild-call-gcc_version-earlier 2006-01-07 01:05:39.000000000 -0800
+++ devel-akpm/arch/ppc/Makefile 2006-01-07 01:05:39.000000000 -0800
@@ -128,7 +128,6 @@ 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 \
diff -puN Makefile~kbuild-call-gcc_version-earlier Makefile
--- Makefile~kbuild-call-gcc_version-earlier 2006-01-07 01:05:39.000000000 -0800
+++ devel-akpm/Makefile 2006-01-07 01:05:39.000000000 -0800
@@ -300,7 +300,7 @@ cc-option-align = $(subst -functions=0,,
# Usage gcc-ver := $(call cc-version $(CC))
cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
$(if $(1), $(1), $(CC)))
-
+GCC_VERSION := $(call cc-version)
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
_
-
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