Path: utzoo!utgpu!watmath!kcwellsch
From: kcwellsch@watmath.waterloo.edu (Ken Wellsch)
Newsgroups: gnu.gcc.bug
Subject: Re: gcc 1.33 doesn't compile itself with stage2/gcc on a sun4os4 and -O
Message-ID: <23426@watmath.waterloo.edu>
Date: 4 Feb 89 03:27:56 GMT
References: <8902032110.AA08194@hector.homer.nj.att.com> <8902032233.AA00341@sugar-bombs.ai.mit.edu>
Reply-To: kcwellsch@watmath.waterloo.edu (Ken Wellsch)
Distribution: gnu
Organization: U. of Waterloo, Ontario
Lines: 12

>    On a sun4os4 configuration, if you change CFLAGS in the Makefile to -O
>    instead of -g, cc1 coredumps in the last stage (when you run
>    make CC=stage2/gcc CFLAGS="-O -Bstage2/") on the file toplev.c.

I expect you are changing the "-g" to a "-O" on the first "make"
compilation step in compiling gcc which uses the native "cc".  Don't.

Another software person here discovered that it wasn't very hard to find
examples of C code that when compiled using the stock "cc" on sun4-os4
WITH optimization, it produce WRONG code.  We were really impressed with
the code generated with gcc-1.32.  BTW: it was not wrong on the samples
he found failed with "cc -O".