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 {
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<tr><td><span title='2024-04-14 10:29:07 +0200'>2024-04-14</span></td><td><a href='/guix/commit/doc/images/bootstrap-packages.dot?id=076670f7acb740e2bfbd8e3c8ef1be5221ed75c5'>doc: Use "dejavu sans" instead of "Helvetica" or "sans" in dot images.</a><span class='msg-avail'>...<span class='msg-tooltip'>Font-dejavu is (now) an input of fontconfig.  Specifying "dejavu sans" makes
generated images reproducible even when other fonts are installed (notably
font-google-noto).

* doc/images/bootstrap-graph.dot,
doc/images/bootstrap-packages.dot,
doc/images/coreutils-bag-graph.dot,
doc/images/coreutils-graph.dot,
doc/images/gcc-core-mesboot0-graph.dot,
doc/images/service-graph.dot,
doc/images/shepherd-graph.dot: Use fontname = "dejavu sans".
* doc/guix.texi (Full-Source Bootstrap): Update gcc-core-mesboot0.dot recipe
accordingly.

Change-Id: If21d7d39d45c66de5bceafb7b825a057d540ee50
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>