Search libraries in GUIX_KF5INIT_LIB_PATH.

Based on an idea by NixOs
pkgs/development/libraries/kde-frameworks/kinit/kinit-libpath.patch

===================================================================
--- kinit-5.32.0/src/kdeinit/kinit.cpp.orig	2017-10-22 21:02:20.908765455 +0200
+++ kinit-5.32.0/src/kdeinit/kinit.cpp	2017-10-22 21:03:25.312818248 +0200
@@ -623,20 +623,18 @@
             if (libpath_relative) {
                 // NB: Because Qt makes the actual dlopen() call, the
                 //     RUNPATH of kdeinit is *not* respected - see
                 //     https://sourceware.org/bugzilla/show_bug.cgi?id=13945
                 //     - so we try hacking it in ourselves
-                QString install_lib_dir = QFile::decodeName(
-                        CMAKE_INSTALL_PREFIX "/" LIB_INSTALL_DIR "/");
-                QString orig_libpath = libpath;
-                libpath = install_lib_dir + libpath;
-                l.setFileName(libpath);
-                if (!l.load()) {
-                    libpath = orig_libpath;
-                    l.setFileName(libpath);
-                    l.load();
-                }
+                // Try to load the library relative to the active profiles.
+                QByteArrayList profiles = qgetenv("KDEINIT5_LIBRARY_PATH").split(':');
+                for (const QByteArray &profile: profiles) {
+                    if (!profile.isEmpty()) {
+                        l.setFileName(QFile::decodeName(profile) + QStringLiteral("/") + libpath);
+                        if (l.load()) break;
+                    }
+		}
             } else {
                 l.load();
             }
             if (!l.isLoaded()) {
                 QString ltdlError(l.errorString());
>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e'>root</a>/<a href='/guix/log/tests?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e'>tests</a>/<a href='/guix/log/tests/guix-pack.sh?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e'>guix-pack.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-pack.sh?id=5fa4814b4f12b82a7a7747bfacfb45b0348eae1e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-09-28 21:06:36 -0500'>2020-09-28</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=d8934360d2453a403b5433e71d09188e4ed23b57'>tests: Simplify shell exit status negation;</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-lint.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh: Use the shell '!' keyword to negate command exit status
in place of 'if ...; then false; else true; fi'
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-05-14 17:21:27 +0200'>2020-05-14</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=80963744a242257921917df5a901dc343d3a93db'>store: 'mapm/accumulate-builds' preserves '%current-target-system'.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/41182&gt;.

* guix/store.scm (mapm/accumulate-builds): Pass #:system and #:target to
'run-with-store'.
* tests/store.scm ("mapm/accumulate-builds, %current-target-system"):
New test.
* tests/guix-pack.sh: Add 'guix pack -d --target' test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-31 00:06:36 +0200'>2020-03-31</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=b771e0176a9cafaaf5fc279a7f3e5e3033b5fb4f'>pack: Adjust test to '--dry-run' changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 131f50cdc9dbb7183023f4dae759876a9e700bef.

* tests/guix-pack.sh: Use '--no-grafts' in conjunction with '-n' and '-d'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-22 15:07:59 +0100'>2019-11-22</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=ca541f9ce692ef96f6d5638eb37f70714cedd933'>pack: Allow multiple '--manifest' options.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pack.scm (guix-pack): Collect 'manifest' options, and
concatenate the resulting manifests.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-21 11:48:30 +0100'>2019-11-21</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=a2e661e95f8ab2fcb7741198234395b367a794c1'>pack: Add "--derivation".</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pack.scm (%options, show-help): Add "--derivation".
(guix-pack): Honor it.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-22 00:09:41 +0200'>2019-05-22</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=fd214f1522063905021a297dab1ac4d85d94ad83'>pack: Add '--root'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pack.scm (%options, show-help): Add "--root".
(guix-pack): Honor it.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-09 17:42:31 +0200'>2019-05-09</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=8deb65c37850bfca36429f3fe5239bd9236f969c'>tests: Ensure 'unshare' works before relying on it.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/35642&gt;.
Reported by Josh Holland &lt;josh@inv.alid.pw&gt;.

* tests/guix-pack-relocatable.sh: Before invoking 'unshare' at the
bottom, add "if unshare -r true" condition.
* tests/guix-pack.sh: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>