From: Serge Belyshev <33554432@mtu-net.ru>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] arch/i386/Makefile,scripts/gcc-version.sh,Makefile small fixes
Date: 24 Jan 2004 17:04:54 +0300 [thread overview]
Message-ID: <87oestsard.fsf@mtu-net.ru> (raw)
[This patch is against 2.6.2-rc1-mm2]
arch/i386/Makefile:
* omitted $(KBUILD_SRC)/ in script call.
scripts/gcc-version.sh:
* GNU tail no longer supports 'tail -1' syntax.
Makefile:
* There is no point in adding -funit-at-a-time option because it is
enabled by default at levels -Os, -O2 and -O3.
* 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.
diff -urN vanilla-2.6.2-rc1-mm2/arch/i386/Makefile hack/arch/i386/Makefile
--- vanilla-2.6.2-rc1-mm2/arch/i386/Makefile Sat Jan 24 15:49:56 2004
+++ hack/arch/i386/Makefile Sat Jan 24 15:32:13 2004
@@ -70,7 +70,7 @@
# -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) $(KBUILD_SRC)/scripts/gcc-version.sh $(CC))
cflags-$(CONFIG_REGPARM) += $(shell if [ $(GCC_VERSION) -ge 0300 ] ; then echo "-mregparm=3"; fi ;)
CFLAGS += $(cflags-y)
diff -urN vanilla-2.6.2-rc1-mm2/scripts/gcc-version.sh hack/scripts/gcc-version.sh
--- vanilla-2.6.2-rc1-mm2/scripts/gcc-version.sh Sat Jan 24 15:49:59 2004
+++ hack/scripts/gcc-version.sh Sat Jan 24 15:28:02 2004
@@ -8,7 +8,7 @@
compiler="$*"
-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
diff -urN vanilla-2.6.2-rc1-mm2/Makefile hack/Makefile
--- vanilla-2.6.2-rc1-mm2/Makefile Sat Jan 24 15:49:59 2004
+++ hack/Makefile Sat Jan 24 15:51:30 2004
@@ -435,15 +435,12 @@
ifndef CONFIG_FRAME_POINTER
CFLAGS += -fomit-frame-pointer
+CFLAGS += $(call check_gcc,-fweb,)
endif
ifdef CONFIG_DEBUG_INFO
CFLAGS += -g
endif
-
-# Enable unit-at-a-time mode when possible. It shrinks the
-# kernel considerably.
-CFLAGS += $(call check_gcc,-funit-at-a-time,)
# warn about C99 declaration after statement
CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,)
next reply other threads:[~2004-01-24 14:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-24 14:04 Serge Belyshev [this message]
2004-01-24 18:17 ` [PATCH] arch/i386/Makefile,scripts/gcc-version.sh,Makefile small fixes Andrew Morton
2004-01-24 18:32 ` Valdis.Kletnieks
2004-01-25 1:55 ` Serge Belyshev
2004-01-25 1:40 ` Serge Belyshev
-- strict thread matches above, loose matches on Subject: below --
2004-01-24 14:37 sam
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