Taken from the Debian package.

From 7be4a19b76d98260cf95040a47935f854a4ba7a4 Mon Sep 17 00:00:00 2001
From: Valentin Rusu <kde@rusu.info>
Date: Sat, 17 Dec 2011 13:47:58 +0100
Subject: [PATCH] Fix .pc file by adding clucene-shared library

---
 src/core/libclucene-core.pc.cmake |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/src/core/libclucene-core.pc.cmake
+++ b/src/core/libclucene-core.pc.cmake
@@ -6,6 +6,6 @@ includedir=${prefix}/include:${prefix}/i
 Name: libclucene
 Description: CLucene - a C++ search engine, ported from the popular Apache Lucene
 Version: @CLUCENE_VERSION_MAJOR@.@CLUCENE_VERSION_MINOR@.@CLUCENE_VERSION_REVISION@.@CLUCENE_VERSION_PATCH@
-Libs: -L${prefix}/@LIB_DESTINATION@/ -lclucene-core
+Libs: -L${prefix}/@LIB_DESTINATION@/ -lclucene-core -lclucene-shared
 Cflags: -I${prefix}/include -I${prefix}/include/CLucene/ext
 ~
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<tr><td><span title='2020-06-06 22:13:25 +0200'>2020-06-06</span></td><td><a href='/guix/commit/gnu/packages/patches/akonadi-paths.patch?id=6701d2323688d752cdf6e368499dd21f32fb9656'>gnu: KDE: Update to 20.04.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/akonadi-paths.patch: Adjust for upstream changes.
* gnu/packages/patches/kdepim-runtime-Fix-missing-link-libraries.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/kde-internet.scm (kget, kopete, krdc, libgravatar): Update to
20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde-multimedia.scm (audiocd-kio, dragon, ffmpegthumbs, juk,
k3b, kamoso, kmix, kwave, libkcddb, libkcompactdisc): Likewise.
* gnu/packages/kde-systemtools.scm (dolphin, dolphin-plugins, khelpcenter,
konsole, krfb, ksystemlog): Update to 20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde-utils.scm (kate, kmag, kmousetool, kmouth, sweeper): Update
to 20.04.1.
[source](uri): Adjust for new upstream location.
* gnu/packages/kde.scm (baloo-widgets, libkomparediff2, kqtquickcharts,
grantleetheme, kcachegrind, libkdegames, zeroconf-ioslave): Update to 20.04.1.
[source](uri): Adjust for new upstream location.
(grantleetheme)[inputs]: Add KGUIADDONS.
* gnu/packages/kde-pim.scm (akonadi, akonadi-calendar, akonadi-contacts,
akonadi-mime, akonadi-notes, akonadi-search, kincidenceeditor, kaddressbook,
kalarmcal, kblog, kcalendarsupport, kcalutils, kdav, kdepim-apps-libs,
kdepim-runtime, keventviews, kgpg, kidentitymanagement, kimap, kldap,
kleopatra, kmail, kmailcommon, kmailimporter, kmailtransport, kmbox,
kmessagelib, kmime, knotes, kontactinterface, korganizer, kpimcommon,
kpimtextedit, ksmtp, ktnef, libkdepim, libkgapi, libkleo, libksieve): Update
to 20.04.1.
[source](uri): Adjust to current.
(akonadi)[inputs]: Remove KDBUSADDONS and KDESIGNERPLUGIN.
(akonadi-calendar)[inputs]: Remove KDBUSADDONS.
(kdepim-runtime)[source](patches): Remove.
[arguments]: Add phase 'extend-CPLUS_INCLUDE_PATH'.
[inputs]: Remove KDBUSADDONS and KICONTHEMES.
(kmessagelib)[arguments]: Add phase 'extend-CPLUS_INCLUDE_PATH.
[inputs]: Add QCA.
(kdepim-apps-libs)[inputs]: Remove KDBUSADDONS and KICONTHEMES.
(knotes)[inputs]: Remove KDBUSADDONS.
(kpimcommon)[inputs]: Remove KDBUSADDONS and KCOMPLETION.
(libksieve)[arguments]: Disable one more test.
(korganizer)[arguments]: Disable one test.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-03 14:27:22 +0100'>2020-02-03</span></td><td><a href='/guix/commit/gnu/packages/patches/akonadi-paths.patch?id=e35b50ecdd553f3fac4d16db311149dbcc3028fe'>gnu: Add akonadi.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/kde-pim.scm,
  gnu/packages/patches/akonadi-paths.patch,
  gnu/packages/patches/akonadi-Revert-Make-installation-properly-relocatabl.patch
  gnu/packages/patches/akonadi-timestamps.patch: New files.
* gnu/local.mk (MODULES): Add kde-pim.scm. (dist_patch): Add the patches.
</span></span></td><td>Hartmut Goebel</td></tr>