Remove add-ons mechanism

[Andreas K. Huettel]

Am Donnerstag, 28. September 2017, 19:49:28 CEST schrieb Joseph Myers:
> glibc has an add-ons mechanism to allow additional software to be
> integrated into the glibc build. 
[...]
> libidn used to have separate release tarballs
> but no longer does so, but still uses the add-ons mechanism within the
> glibc source tree.  

http://git.savannah.gnu.org/gitweb/?p=libidn.git;a=shortlog

Doesn't look dead to me; actually the libidn inside glibc looks way outdated 
(before 2012 I think).

See also https://sourceware.org/bugzilla/show_bug.cgi?id=22247
[CVE-2017-14062 : Integer overflow in the decode_digit function in 
puny_decode.c in libidn]

> Various other software has supported building with
> the add-ons mechanism at times in the past, but I don't think any is
> still widely used.

> libidn is now built via the Subdirs mechanism to cause any
> configuration using sysdeps/unix/inet to build libidn; HAVE_LIBIDN
> (which effectively means shared libraries are available) is now
> defined via sysdeps/unix/inet/configure.

-- 
PD Dr. Andreas K. Hüttel 
Institute for Experimental and Applied Physics
University of Regensburg
93040 Regensburg
Germany

tel. +49 941 943 1618 (office)
tel. +49 151 241 67748 (mobile)
e-mail andreas.huettel@ur.de
http://www.akhuettel.de/
http://www.physik.uni-r.de/forschung/huettel/
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