From: Serge Belyshev <33554432@mtu-net.ru>
arch/i386/Makefile:
* omitted $(KBUILD_SRC)/ in script call.
scripts/gcc-version.sh:
* GNU tail no longer supports 'tail -1' syntax.
We should consider adding -fweb option:
vanilla:
$ size vmlinux
text data bss dec hex filename
3056270 526780 386056 3969106 3c9052 vmlinux
with -fweb:
$ size vmlinux
text data bss dec hex filename
3049523 526780 386056 3962359 3c75f7 vmlinux
Also note 0.1 ... 1.0% speedup in various benchmarks.
This option is not enabled by default at -O2 because it
(like -fomit-frame-pointer) makes debugging impossible.
---
arch/i386/Makefile | 2 +-
scripts/gcc-version.sh | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff -puN arch/i386/Makefile~add-config-for-mregparm-3-ng-fixes arch/i386/Makefile
--- 25/arch/i386/Makefile~add-config-for-mregparm-3-ng-fixes 2004-01-24 13:43:04.000000000 -0800
+++ 25-akpm/arch/i386/Makefile 2004-01-24 13:43:04.000000000 -0800
@@ -70,7 +70,7 @@ cflags-$(CONFIG_X86_ELAN) := -march=i486
# -mregparm=3 works ok on gcc-3.0 and later
#
-GCC_VERSION := $(shell $(CONFIG_SHELL) scripts/gcc-version.sh $(CC))
+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 ;)
CFLAGS += $(cflags-y)
diff -puN scripts/gcc-version.sh~add-config-for-mregparm-3-ng-fixes scripts/gcc-version.sh
--- 25/scripts/gcc-version.sh~add-config-for-mregparm-3-ng-fixes 2004-01-24 13:43:04.000000000 -0800
+++ 25-akpm/scripts/gcc-version.sh 2004-01-24 13:43:04.000000000 -0800
@@ -8,7 +8,7 @@
compiler="$*"
-MAJOR=$(echo __GNUC__ | $compiler -E -xc - | tail -1)
-MINOR=$(echo __GNUC_MINOR__ | $compiler -E -xc - | tail -1)
+MAJOR=$(echo __GNUC__ | $compiler -E -xc - | tail -n 1)
+MINOR=$(echo __GNUC_MINOR__ | $compiler -E -xc - | tail -n 1)
printf "%02d%02d\\n" $MAJOR $MINOR
_