bug#22086: 25.1.50; [PATCH] Integrate the musl hybrid malloc patch for elf systems

[Wolfgang Jenkner <wjenkner@inode.at>]

On Wed, Dec 16 2015, Paul Eggert wrote:

> Those patches look reasonable, except that one is listed as being by
> Rich Felker, who has not signed copyright papers for GNU Emacs as far
> as I know. I'll CC: this to him to give him a heads-up. Rich, would
> you mind transferring copyright to that patch to the FSF? Here's
> a link:
>
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22086;msg=5;att=3;filename=0004-Add-musl-patch-to-support-HYBRID_MALLOC-on-elf-syste.patch


Rich Felker has asked me in private mail (please, please CC your replies
to 22086@debbugs.gnu.org) to clarify the authorship of that patch.
I actually stated in the commit message

    Except for build system fixes this is essentially the same as

    http://git.alpinelinux.org/cgit/aports/tree/testing/emacs/musl.patch?id=d6f211ec868df4657c745b8ba2bae77b2a7fb7f6

So, I wrote the build system fixes, and, strictly speaking, only the two
lines in src/unexelf.c which declare and initialize bss_sbrk_did_unexec
are directly from the original "Alpine Linux" patch above.

I can split the patch accordingly and ascribe only the latter part to
Rich Felker if this is preferred.  The original patch still helped me to
quickly find where I had to change something; this is why a attributed
the whole patch to Rich Felker as it is just an expansion, as it were,
of his version.

Wolfgang