From owner-freebsd-hackers  Mon Apr  6 11:19:33 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id LAA01207
          for freebsd-hackers-outgoing; Mon, 6 Apr 1998 11:19:33 -0700 (PDT)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from computer.eng.mindspring.net (computer.eng.mindspring.net [207.69.183.4])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA01032
          for <freebsd-hackers@freebsd.org>; Mon, 6 Apr 1998 11:18:53 -0700 (PDT)
          (envelope-from ahobson@computer.eng.mindspring.net)
Received: (from ahobson@localhost)
          by computer.eng.mindspring.net (8.8.8/8.8.4)
	  id OAA22227; Mon, 6 Apr 1998 14:18:21 -0400 (EDT)
From: Andrew Hobson <ahobson@eng.mindspring.net>
To: freebsd-hackers@FreeBSD.ORG
Subject: Optimization bug with gcc 2.7.2 + mktemp
Mime-Version: 1.0 (generated by tm-edit 7.108)
Content-Type: text/plain; charset=US-ASCII
Date: 06 Apr 1998 14:18:21 -0400
Message-ID: <kjd8eu24r6.fsf@computer.eng.mindspring.net>
Lines: 22
X-Mailer: Quassia Gnus v0.29/XEmacs 20.5(beta30) - "Moxoto"
X-Face: (e_H,)"'M4u!E!3"|XVHJ=[/_.:z73Z^oGf")[Payuf<O{r'0#<wNH7gYu11@i4Wt?GW$0"
 oC`,VQM?\@jqFD"%&H46Fi{9TpoTDsN:!3~C_^%Mo42*A1\v_#o/o$!CXeDB!=od8!{&=s'e%gdjZR
 ]XLr2%`tg,1"p".n9H+JF$`!Y|FLM[0D(eZW4!_6b48g+C}E<~Rd?(QD
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG


I'm running -current supped at the beginning of March.

I been having core dumps when using programs that called mktemp(3)
repeatedly.  I finally traced it down to the fact that when I compile
libc with -fomit-frame-pointer, mktemp.c is compiled incorrectly.
Specifially, when _gettemp is called, the third argument (domkdir) is
garbage.  This is "impossible" because _mktemp calls it thusly:

        return(_gettemp(path, (int *)NULL, 0) ? path : (char *)NULL);

I realize it's my own damn fault for compiling with optimization out
the wazoo, but I was wondering if anyone else has had this same
problem.

I haven't seen any warnings about this, so I thought I'd pass it
along.  From browsing the mailing list archives, it seems that patches
have been submitted in the past to make FreeBSD "-fomit-frame-pointer
safe".  Specifically, lib/csu/i386/Makefile explicitly adds
-fno-omit-frame-pointer to CFLAGS.  I don't know if that's the right
answer this time or not.

Drew

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message