Path: utzoo!utgpu!cunews!bnrgate!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: lynxys!jaw@dynamo.ecn.purdue.edu (Jim Wildman)
Newsgroups: comp.sys.sun
Subject: 68881 support in SunOS 4.1.1
Keywords: No Digest Subjects in Unmoderated Mode
Message-ID: <2936@brchh104.bnr.ca>
Date: 4 Jun 91 18:40:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sunspots, Psuedo-Unmoderated
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Approved: sun-spots@rice.edu
X-Original-Date:    Tue, 7 May 91 12:45:33 EST


	System:
	 3/160 with MC68881 and 4 Meg of memory
	 SunOS 4.1.1
	 Usual peripherals.

Today I had occassion to recompile the kernal.  As make was running, I
noticed that it called cc with '-fsoft'.  Since we have the MC68881 on the
cpu board I thought I would make use of it.  I changed
/usr/kvm/sys/sun3/conf/Makefile.src to use '-f68881' and reran /etc/config.
The make now calls cc with '-f68881' and runs fine until it gets to 

	'loading vmunix' 

where it croaks with a

	'f68881_used undefined' 

error.  What gives?  Does it not make any difference to the kernal which 
floating point option I use?  Is my MC68881 just a glorified heat sink?  
Did I miss a module when I loaded the system?