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bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9)

From: Paul Eggert
Subject: bug#22065: core dumped during compilation (emacs-25 branch on FreeBSD 9)
Date: Mon, 15 Feb 2016 00:17:16 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

Joseph Mingrone wrote:
I'll submit a patch for the FreeBSD port to use clang.

Hold on a minute. Please don't do that, as Emacs is far more tested on GCC and (among other things) GCC has better compile-time checking on Emacs. Instead of papering over the bug (if there is a bug), let's fix it. Here are some points:

1. I just now booted FreeBSD-9.3-RELEASE-i386 under VirtualBox and verified that Emacs dumped core without my recent patch <http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-25&id=1834ac7d24c60ecabb4fc2469d350a03db1798ab>. I also verified that Emacs build and runs fine with the patch. So, if Emacs is dumping core for you on FreeBSD 9 i386, there's something different about your configuration that is causing the problem. Are you sure you installed the patch correctly in your build?

2. My fix assumes Emacs is built with GCC 4.2.1, the standard GCC on FreeBSD 9 i386. However, your recent email <http://bugs.gnu.org/22065#22> indicates that you're building with GCC 4.8.5. Possibly the problem is due to this compiler or its installation. Can you please try building with the standard GCC 4.2.1 instead?

3. Your most recent email says this:

Message from gcc-4.8.5_2:
To ensure binaries built with this toolchain find appropriate versions
of the necessary run-time libraries, you may want to link using


And yet the same email's log says that Emacs was not linked with that flag. Perhaps this configuration glitch explains your problem?

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