delorie.com/archives/browse.cgi   search  
Mail Archives: cygwin/2010/07/26/12:16:32

X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=0.8 required=5.0 tests=BAYES_50,SPF_HELO_PASS
X-Spam-Check-By: sourceware.org
From: "Joseph Quinsey" <jquinsey AT entrenet DOT com>
To: <cygwin AT cygwin DOT com>
References:
Subject: RE: Runtime SEGV from gcc -O3 -march=native
Date: Mon, 26 Jul 2010 12:16:03 -0400
Message-ID: <5658D512251040778D1DF5B5D583ADC9@LeakyCauldron>
MIME-Version: 1.0
In-Reply-To:
X-Declude-Sender: jquinsey AT entrenet DOT com [199.246.24.8]
X-Declude-Spoolname: Db4bc00d500000bec.smd
X-Declude-RefID: str=0001.0A090209.4C4DB4C6.00DB,ss=1,fgs=0
X-Declude-Note: Scanned by Declude 4.10.53 "http://www.declude.com/x-note.htm"
X-Declude-Scan: Outgoing Score [-5] at 12:16:11 on 26 Jul 2010
X-Declude-Tests: NOPOSTMASTER [1], SPFPASS [-2], FILTER_COUNTRY [0]
X-Country-Chain: CANADA->destination
X-Declude-Code: e
X-Declude-Recipcount: 1
X-Helo: relay.thehostingservice.com
X-RevDNS: firemagma2.entrenet.com
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Again, just FYI, with a simpler example, and with -march=native replaced by
k8 or athlon64.

Source code:

int main(void) {
    static int foo[4];
    int i;
    for (i = 0; i < 4; i++)
        foo[i] = 0;
    return 0;
}

Compile and run, using Cygwin's current gcc version 4.3.4: 

    gcc -O3 -march=athlon64 foobar.c
    ./a.exe
    Segmentation fault (core dumped)


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019