GNU bug report logs - #20338
configure test for nopie with gcc 4.4.3 on Trisquel 4.1

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Message #3 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: submit <at> debbugs.gnu.org
Subject: configure test for nopie with gcc 4.4.3 on Trisquel 4.1
Date: Wed, 15 Apr 2015 15:13:04 -0400

Package: emacs
Version: 25.0.50

On fencepost.gnu.org, I noticed the following oddity in config.log:

    configure:30326: checking whether gcc -std=gnu99 accepts -nopie
    configure:30346: gcc -std=gnu99 -o conftest -g3 -O2 -Werror -nopie conftest.c   >&5 
    gcc: unrecognized option '-nopie'
    configure:30346: $? = 0
    configure:30356: result: yes

cat /etc/issue
Trisquel GNU/Linux 4.1 \n \l

gcc --version
gcc (Ubuntu 4.4.3-4ubuntu5.1) 4.4.3

cat test.c
int main ()
 {
   return 0;
 }

gcc -std=gnu99 -o conftest -g3 -O2 -Werror -nopie test.c
gcc: unrecognized option '-nopie'

echo $?
0


Seems odd. Whereas:

gcc -std=gnu99 -o conftest -g3 -O2 -Werror  -foobar test.c
cc1: error: unrecognized command line option "-foobar"

echo $?
1

Message #8 received at 20338 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 20338 <at> debbugs.gnu.org
Subject: Re: bug#20338: configure test for nopie with gcc 4.4.3 on Trisquel 4.1
Date: Wed, 15 Apr 2015 15:42:30 -0400

IIUC, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15303 says that you
can't reliably use the exit status of gcc to check whether it supports
a command-line option prior to gcc 4.6. Whee.

Message #13 received at 20338-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 20338-done <at> debbugs.gnu.org
Subject: Re: configure test for nopie with gcc 4.4.3 on Trisquel 4.1
Date: Thu, 16 Apr 2015 00:18:57 -0700

[Message part 1 (text/plain, inline)]

Thanks for reporting that.  In master commit 
c6e93df20266fe9f8517f14f3b7c367281f988a5 I installed the attached patch, which 
fixed the bug for me.

[0001-Pre-4.6-GCC-succeeds-with-unknown-option.patch (text/x-patch, attachment)]

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