Nixpkgs: ts3client is missing a library?

[jpotier]

Issue description

Recently ts3client broke. Maybe related to my moving from 17.09 to unstable.
Is there anything I can do to work around this?

Steps to reproduce

 % ts3client
QCoreApplication::applicationDirPath: Please instantiate the QApplication object first
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Available platform plugins are: xcb.

Reinstalling the application may fix this problem.
[1]    9294 abort      ts3client

Technical details

 - system: `"x86_64-linux"`
 - host os: `Linux 4.14.8, NixOS, 18.03pre123588.ade98dc442e (Impala)`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 1.11.16`
 - channels(root): `"nixos-18.03pre123588.ade98dc442e"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs`

[jpotier]

To add some info, the very same version of teamspeak_client runs on another PC with nixos, and the only difference seems to be:

$ find /nix/store -name libqxcb.so
/nix/store/phscfzkf1h0p3p325rn22m4avv82yxgs-qtbase-5.6.3-bin/lib/qt-5.6/plugins/platforms/libqxcb.so
/nix/store/0ixf7xg759kfr3pbamcpbn438rzi6vqz-qtbase-5.9.3-bin/lib/qt-5.9/plugins/platforms/libqxcb.so
/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so

qtbase versions are more recent on the current machine where it doesn't work (on my other machine there are on version 5.9.1 and 5.6.2). Maybe ts3client is using a libqxcb.so from qtbase and breaks when they are not compatible anymore?

[jpotier]

Ok, seems that my previous hypothesis is wrong:
```
% QT_DEBUG_PLUGINS=1 ts3client
QCoreApplication::applicationDirPath: Please instantiate the QApplication object first
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ql93xakdkxr4yf65pxbdir2bzy9rq1hg-kitty-0.5.0/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/p0ljc7gk9l0phd13war9l4wd458bv2gx-imagemagick-6.9.9-26/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/21jkxacqk7raayg9w932qsjbdmlc4h56-xsel-unstable-2016-09-02/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/eeva/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/wrappers/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/etc/profiles/per-user/eeva/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/eeva/.nix-profile/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/var/nix/profiles/default/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/current-system/sw/lib/qt-5.6/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so"
Found metadata in lib /nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so, metadata=
{
"IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
"MetaData": {
"Keys": [
"xcb"
]
},
"className": "QXcbIntegrationPlugin",
"debug": false,
"version": 329217
}

Got keys from plugin meta data ("xcb")
loaded library "/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so"
QLibraryPrivate::loadPlugin failed on "/nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so" : "Cannot load library /nix/store/xcl0243lnpix1sdg0adbf69x963akrmp-teamspeak-client-3.1.6/lib/teamspeak/platforms/libqxcb.so: "
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Available platform plugins are: xcb.

Reinstalling the application may fix this problem.
[1] 13921 abort QT_DEBUG_PLUGINS=1 ts3client

[jpotier]

https://github.com/Studio3T/robomongo/issues/1384

If we're in the same case, looks like it could be linked to an incompatible libc? Problem is, there are no details in the error message…

@nathanielbaxter any idea? (I think you are the maintainer of this package)

[jpotier]

Turns out, building with libsForQt59 instead of libsForQt56 makes it work again. This should be fixed in nixpkgs, right? That may mean that a dependency was not caught and qt is relying on what it finds in the environment.

[thall]

I notice this issue for some weeks ago, and i solved it by rebuild it locally..

Yeah you are probably right about the qt version dependency problem.

[dtzWill]

Not related, probably, but noticed that the path for gcc libraries is wrong:

$ readelf -d /nix/store/xncpmad2d09vav32dbfs57ci40phgpgz-teamspeak-client-3.1.7/bin/.ts3client-wrapped|grep RPATH
 0x000000000000000f (RPATH)              Library rpath: [/nix/store/la2xxf4grdyf37a94ak28m7a61yjqzr9-zlib-1.2.11/lib:/nix/store/kqnvjj5vbcwd9d79m86s90f8hb9vali1-glib-2.54.2/lib:/nix/store/58gwbbsgql835943vgxqikny5wbpr4zx-libpng-apng-1.6.34/lib:/nix/store/ik0wyn7pzd93s2mz921crnhqg6i4pfah-freetype-2.7.1/lib:/nix/store/s05c5s040vvs82a4nb0vacsjv247s0av-libSM-1.2.2/lib:/nix/store/4fqm6rb4wnl3lbi9ahkhbcb66ghdfw40-libICE-1.0.9/lib:/nix/store/gfnhf30106lqf4dwvr9hxnyvlkznj1my-libXrender-0.9.10/lib:/nix/store/v8z56hjwli0yxqczzajg5fhi4n6vm65f-openssl-1.0.2n/lib:/nix/store/7xs3vrg1gwcx5wq47nvgsn5vii3qs4nx-libXrandr-1.5.1/lib:/nix/store/cmsyqmp9lsr835g74199y60cn6qkkmc7-libXfixes-5.0.2/lib:/nix/store/an1ms8xjr01pinw7dg836lbv24gmsdgv-libXcursor-1.1.15/lib:/nix/store/s3slry6yqs92slf1kwrz33n3ngwym30i-libXinerama-1.1.3/lib:/nix/store/lnx8y5dz42bzgarl0wwdbwsnl2xq5xfh-libxcb-1.12/lib:/nix/store/jh3apbkm9iiwfkjfl0agpr8x69wdy111-fontconfig-2.12.1-lib/lib:/nix/store/w7nbvpgaqfvdw3i1383agl5yw72fc8g1-libXext-1.3.3/lib:/nix/store/697dh7g650f1qd4aqpkn3zing0g1qgx7-libX11-1.6.5/lib:/nix/store/jbcka9davr83db817s9k5f6n2n5rcran-alsa-lib-1.1.5/lib:/nix/store/ac3qsx12i0jvm6wcam8yizar31kbdkv9-qtbase-5.6.3/lib:/nix/store/bv12bzcci35zni4ch0dj1bnfr9l4cvkh-qtwebengine-5.6.3/lib:/nix/store/sfa7i5pbpmz2s3bx7dabayqh5yi47i4j-qtwebchannel-5.6.3/lib:/nix/store/j0wqpjgywkmc15309cz306y5gvvyrazl-qtsvg-5.6.3/lib:/nix/store/ndnsk78mbl33bzap25mfgnm1wr5ch2dq-libpulseaudio-11.0/lib:/nix/store/8bzg1vgp6qwbs7jmh9wjgiflzjyvm2ig-quazip-0.7.1/lib:/nix/store/06kdww949mfp9pn84al4lmba6iybnr6s-libc++-4.0.1/lib:/nix/store/khvlmyz617vx229kv02qg7pljr9cldla-libc++abi-4.0.1/lib:/nix/store/yhbp3fy8bmkqziawl78srgzjwqyy91s1-gcc-6.4.0/lib64]

Look at the last path, which is /nix/store/yhbp3fy8bmkqziawl78srgzjwqyy91s1-gcc-6.4.0/lib64-- a rather unhelpful path to search for shared libraries:

$ ls /nix/store/yhbp3fy8bmkqziawl78srgzjwqyy91s1-gcc-6.4.0/lib64
gcc                libcilkrts.spec  libmpx.a           libssp_nonshared.a
libasan.a          libgomp.a        libmpx.spec        libstdc++.a
libasan_preinit.o  libgomp.spec     libmpxwrappers.a   libstdc++fs.a
libatomic.a        libitm.a         libquadmath.a      libsupc++.a
libcc1.a           libitm.spec      libsanitizer.spec  libtsan.a
libcilkrts.a       liblsan.a        libssp.a           libubsan.a

This is because of the way the path is constructed; instead it should just add stdenv.cc.cc to deps (or gcc.cc if using gcc's libraries is important). This also lets us drop the libDir bit.

Doing this yields ...::/nix/store/yfkvvnp2ak44nlhfm4xq82i52kzrj4cc-gcc-6.4.0-lib/lib, much better.

[jpotier]

@dtzWill will you be proposing a PR for this?

[symphorien]

I have just opened a PR https://github.com/NixOS/nixpkgs/pull/41137 hopefully fixing this.
For future reference:
LD_DEBUG=libs QT_DEBUG_PLUGINS=1 result/bin/ts3client gives reasonably useful debugging information.