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bug#24065: commit 09ece4d341a7 (Restore the calloc family) causes miscom
From: |
Markus Trippelsdorf |
Subject: |
bug#24065: commit 09ece4d341a7 (Restore the calloc family) causes miscompile for gcc-5 and higher |
Date: |
Mon, 25 Jul 2016 17:58:40 +0200 |
On 2016.07.25 at 17:48 +0200, Wolfgang Jenkner wrote:
> Markus Trippelsdorf <markus@trippelsdorf.de> wrote:
>
> > > > This happens on a Gentoo system (glibc trunk, gcc-6 latest branch):
>
> > But version 24.5 is the latest stable release.
> > It is sad, that it cannot be compiled with gcc-5 or gcc-6.
>
> Actually, on GNU/Linux src/gmalloc.c (which contains the code in
> question) is not even compiled, normally.
>
> The reason for your compilation troubles seems to be that you use
> a recent git checkout of glibc (as you stated above) which I guess
> already contains
>
> http://repo.or.cz/glibc.git/commitdiff/2ba3cfa1607c36613f3b30fb1ae4ec530245ce64
>
> IIUC, this commit removes the declaration of __malloc_initialize_hook,
> so the emacs configure check for "whether malloc is Doug Lea style"
> will fail.
>
> And this is the reason why you suddenly need malloc etc. from
> src/gmalloc.c.
Thanks for finding the root cause.
I can confirm that my glibc versions contains the commit in question.
--
Markus