GNU bug report logs - #33709
Hang when compiled with --coverage and gcc 7.3

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Glenn Morris <rgm <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#33709: closed (Hang when compiled with --coverage and gcc 7.3)
Date: Sat, 29 Jan 2022 19:19:02 +0000

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Your message dated Sat, 29 Jan 2022 14:18:00 -0500
with message-id <s0wniis653.fsf <at> fencepost.gnu.org>
and subject line Re: bug#33709: Hang when compiled with --coverage and gcc 7.3
has caused the debbugs.gnu.org bug report #33709,
regarding Hang when compiled with --coverage and gcc 7.3
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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33709: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33709
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From: Glenn Morris <rgm <at> gnu.org>
To: submit <at> debbugs.gnu.org
Subject: Hang when compiled with --coverage and gcc 7.3
Date: Tue, 11 Dec 2018 13:59:34 -0500

Package: emacs
Version: 27.0.50

The Emacs hydra jobset at https://hydra.nixos.org/jobset/gnu/emacs-trunk
was recently updated to a more recent version of the Nix package
collection. Ever since then, the "coverage" job (which is the one that
runs "make check") has timed out after spending hours failing to
compiled the first test .el file.

I have reproduced the problem on RHEL 7.6 as follows:

bootstrap as normal
./make-dist --snapshot --no-check --no-changelog --no-compress
tar xvf ../emacs-27.0.50.tar
cd emacs-27.0.50

scl enable devtoolset-7  # this enables gcc 7.3.1 as the default compiler
export CFLAGS=--coverage
./configure --without-all --without-x --without-libgmp
make -j8

The build completes fine, but now eg:

./src/emacs --help

never exits. It prints the usage message, then hangs.

[Message part 3 (message/rfc822, inline)]

From: Glenn Morris <rgm <at> gnu.org>
To: 33709-done <at> debbugs.gnu.org
Subject: Re: bug#33709: Hang when compiled with --coverage and gcc 7.3
Date: Sat, 29 Jan 2022 14:18:00 -0500

Version: 29.0.50

In https://hydra.nixos.org/build/165911357 I stopped forcing gcc 4.8
in the coverage build. It worked ok with gcc 7.3.0.

Ref
http://git.savannah.gnu.org/cgit/hydra-recipes.git/diff/?id=f7344f0e8d56f57de28d4259db96e31f6a013812&id2=5686a5540572a2a6fbc2ba81a429ebdb36fcb631

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