Explicitly link against libicui18n so that libQtCore.so always finds it.

--- qt-everywhere-opensource-src-4.8.6/src/corelib/corelib.pro	2015-04-15 12:01:41.661862663 +0200
+++ qt-everywhere-opensource-src-4.8.6/src/corelib/corelib.pro	2015-04-15 12:03:57.954586336 +0200
@@ -19,6 +19,13 @@ include(codecs/codecs.pri)
 include(statemachine/statemachine.pri)
 include(xml/xml.pri)
 
+# Explicitly link with icui18n, which is dlopened by libQtCore.so.
+# We cannot do this by setting LDFLAGS because that then overrides
+# other LDFLAGS: <https://bugreports.qt.io/browse/QTBUG-5471>.
+# XXX: According to the Nixpkgs recipe, this may be necessary for
+# further libraries (cups, gtk-x11-2.0, libgdk-x11-2.0).
+LIBS_PRIVATE += -licui18n
+
 !qpa:mac|darwin:LIBS_PRIVATE += -framework ApplicationServices
 qpa:mac {
     !ios {
'koszko-scripts'>koszko-scripts</option>
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<tr><td><span title='2022-04-11 00:25:33 +0200'>2022-04-11</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=f42959662765d1cd47137ff5da09086fc6a62e99'>shepherd: 'fork+exec-command/container' always returns a PID.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a regression introduced in
938448bf40fc77092859352d2243e2d0c236375f whereby
'fork+exec-command/container' would return #t, then used as the running
value of the 'guix-daemon' service in the installer.  Upon installation
completion, stopping the 'guix-daemon' service would fail with
wrong-type-arg because that #t would be passed to the 'stop' method in
lieu of a PID.

* gnu/build/shepherd.scm (fork+exec-command/container): Return a PID
rather than #t.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-04-11 00:25:33 +0200'>2022-04-11</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=ada530acb1e848daaac027872e6bad067e82207b'>shepherd: 'exec-command*' has a valid default #:directory.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a regression introduced in
938448bf40fc77092859352d2243e2d0c236375f where 'exec-command*' could
get #:directory #f, in particular when called by
'fork+exec-command/container'.

* gnu/build/shepherd.scm (exec-command*): Add default value for #:directory.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-04-07 00:08:55 +0200'>2022-04-07</span></td><td><a href='/guix/commit/gnu/build/shepherd.scm?id=938448bf40fc77092859352d2243e2d0c236375f'>shepherd: Adjust 'fork+exec-command/container' for the Shepherd 0.9.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/shepherd.scm (exec-command*): New procedure, with code
formerly...
(make-forkexec-constructor/container): ... here.  Use it.
(fork+exec-command/container): Use 'fork+exec-command' only when
CONTAINER-SUPPORT? is false or PID is the current process.
</span></span></td><td>Ludovic Courtès</td></tr>