X-POP3-Rcpt:	mlehmann AT universe DOT sgh-net DOT de
Message-Id:	<199801250638.AAA18215@mail.mankato.msus.edu>
25 Jan 1998 00:38:51 -0600 (CST) :
From:	Jeffrey Hundstad <jeffrey DOT hundstad AT mankato DOT msus DOT edu>
Subject:	Re: useing PGCC with the Linux 2.1.*
To:	rkn AT ipa DOT net
cc:	beastium-list AT Desk DOT nl
In-Reply-To:	<34C96C2D.C8707AED@ipa.net>
MIME-Version:	1.0
Sender:	Marc Lehmann <pcg AT goof DOT com>
Status:	RO
X-Status:	A
Lines:	85

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Content-Type: TEXT/plain; CHARSET=US-ASCII

Attached is the diff file that I use to put pentium optimizations flags
into the kernel make files.  I'm no expert... so other feel FREE to
prove this method wrong :-)

BTW:  This turns off SMP too.

On 23 Jan, Russell mikunda wrote:
> I have installed and would like to know how to have the pgcc compile the
> kernel  for
> a pentium ??, I went into the Makefile for the kernel and added the
> -mpentium  and
> changed the -02 to -06, But I'm not sure if that was the right thing to
> do or not.
> here is how it was doing it.....
> 
> gcc -D__KERNEL__ -I/hda2/linux/include -Wall -Wstrict-prototypes -O6
> -fomit-frame-pointer -mpentium -pipe -fno-strength-reduce -m486
> -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=586
> -DUTS_MACHINE='"i386"' -c -o init/version.o init/version.c
> 
> I have a pentium  166
> 
> Please reply to me at rkn AT ipa DOT net


--495383553-1169529124-885710338=:12955
Content-Type: TEXT/plain; CHARSET=US-ASCII
Content-Description: opt.diff

diff -u --recursive --new-file linux-2.1.80-4/Makefile linux/Makefile
--- linux-2.1.80-4/Makefile	Mon Jan 19 13:41:45 1998
+++ linux/Makefile	Mon Jan 19 13:39:31 1998
@@ -11,7 +11,7 @@
 #
 # NOTE! SMP is experimental. See the file Documentation/SMP.txt
 #
-SMP = 1
+# SMP = 1
 #
 # SMP profiling options
 # SMP_PROF = 1
@@ -27,7 +27,7 @@
 FINDHPATH	= $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net
 
 HOSTCC  	=gcc
-HOSTCFLAGS	=-O2 -fomit-frame-pointer
+HOSTCFLAGS	=-O9 -frisc -fomit-frame-pointer
 
 CROSS_COMPILE 	=
 
@@ -88,7 +88,7 @@
 # standard CFLAGS
 #
 
-CFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+CFLAGS = -Wall -Wstrict-prototypes -O9 -frisc
 
 ifdef CONFIG_CPP
 CFLAGS := $(CFLAGS) -x c++
diff -u --recursive --new-file linux-2.1.80-4/arch/i386/Makefile linux/arch/i386/Makefile
--- linux-2.1.80-4/arch/i386/Makefile	Tue Oct 14 20:24:09 1997
+++ linux/arch/i386/Makefile	Mon Jan 19 11:53:45 1998
@@ -23,7 +23,7 @@
 LDFLAGS=-e stext
 LINKFLAGS =-T $(TOPDIR)/arch/i386/vmlinux.lds $(LDFLAGS)
 
-CFLAGS := $(CFLAGS) -pipe -fno-strength-reduce
+CFLAGS := $(CFLAGS) -pipe 
 
 ifdef CONFIG_M386
 CFLAGS := $(CFLAGS) -m386 -DCPU=386
@@ -34,7 +34,7 @@
 endif
 
 ifdef CONFIG_M586
-CFLAGS := $(CFLAGS) -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=586
+CFLAGS := $(CFLAGS) -mpentium -DCPU=586
 endif
 
 ifdef CONFIG_M686

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