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Will Dietz 503f8efbcd epoxy: explicitly search libGL path as fallback
Don't rely on questionable impact of DT_RPATH on dlopen().

This is a bit of a messy subject, but probably the clearest
reference to motivate *not* relying on how dlopen() behaves
in the presence of RPATH or RUNPATH is the following:

https://sourceware.org/ml/libc-hacker/2002-11/msg00011.html

FWIW the dlopen() manpage only mentions the the RPATH
and RUNPATH in the "executable file for the calling program";
no mention of the executable files for libraries--
this has been brought to the attention of the relevant
parties and AFAICT nothing has been done.

The best reference for glibc behavior is
apparently to ... "try it and see".
Luckily a generous soul did exactly that
and reported the findings:

https://www.spinics.net/lists/linux-man/msg02291.html

Qt wrote on the subject a bit when they were bit by this,
linking to the above articles (directly or indirectly).

See:
http://blog.qt.io/blog/2011/10/28/rpath-and-runpath/

--------

Since we know the path of libGL at build-time for libepoxy,
there's a simple solution we can use to avoid all of this:
simply teach libepoxy to explicitly look in the libGL path.

This commit patches libepoxy to accomplish this,
looking to "LIBGL_PATH" as a fallback if it cannot find
the libraries otherwise.

---------

This fixes use of libepoxy w/musl on NixOS!
2018-04-02 12:35:37 -05:00
.github CODEOWNERS: Add Profpatsch to /lib/generators.nix 2018-03-24 13:35:41 +00:00
doc lib/generators: add an example of overriding defaults 2018-03-29 16:53:06 +02:00
lib lib/generators: introduce a sane default for mkValueString 2018-03-29 16:53:06 +02:00
maintainers Merge remote-tracking branch 'upstream/master' into HEAD 2018-03-30 08:14:35 +02:00
nixos Merge remote-tracking branch 'upstream/master' into HEAD 2018-03-30 08:14:35 +02:00
pkgs epoxy: explicitly search libGL path as fallback 2018-04-02 12:35:37 -05:00
.editorconfig Do not trim trailing whitespace in patch files 2017-01-12 23:44:26 +01:00
.gitattributes gitattributes: disable merge=union in all-packages 2018-03-27 11:03:03 -05:00
.gitignore
.version 18.03 -> 18.09 2018-03-05 19:47:39 +01:00
COPYING 2018 will be the year of NixOS 2018-01-04 17:59:52 -05:00
default.nix default.nix: Provide correct instructions how to upgrade Nix 2017-03-18 21:04:07 +02:00
README.md README: Use HTTPS for all hyperlinks 2017-11-22 19:51:40 +01:00

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