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='2020-07-17 22:13:58 +0200'>2020-07-17</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=c9ea5dfdbe1c4758cfbd7b4b665219d4b8a4bad6'>tests: docker-system: Use guile-3.0.</a><span class='msg-avail'>...</span></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-03-09 23:46:36 +0100'>2020-03-09</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=0e42a1643ea5a0cc4ddb81687c608ba407fdcdbb'>tests: docker-system: Increase memory requirement.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-09 23:04:14 +0100'>2019-11-09</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=f0034427f50be1bcab137d9877c3586e4be4d83e'>tests: Update references to the now-deprecated 'guile-json' variable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-08-27 12:20:44 +0200'>2019-08-27</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=7979a287f8eb84cbbfa44629951572408939a756'>pack: Create /tmp in Docker images.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-04 18:05:02 +0200'>2019-07-04</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=b9fcf0c82a14df48c7c6f36a08dbdcd3184fcbf8'>pack: 'docker' backend records the profile's search paths.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-07 09:57:19 +0200'>2019-06-07</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=a0f352b30f4869a7af7017b8a5011ac7602dd115'>pack: Add '--entry-point'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-15 16:36:21 +0200'>2019-05-15</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=247649d42e60b718f3f46b2bcf72d19bf799d503'>vm: 'system-docker-image' provides an entry point.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-18 22:24:14 +0100'>2019-01-18</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=69e47686c9a8a2b5c4ee33e5b14da657de3d7ca0'>tests: docker: Use "package" instead of "dummy-package".</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-15 12:16:46 +0100'>2019-01-15</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=49ec5d88c5770ae49b45849cb691c8921ecf4ca7'>tests: docker: Run a guest guile inside the docker container.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-11 12:14:37 +0100'>2019-01-11</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=babfd9447df08a809622238b4830eb046dab2ba6'>tests: Nitpick on Docker test.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-10 05:15:41 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=dc4b4a38fa2577d4dd01f80b4bc8c9255304e576'>tests: docker: Fix test.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 03:44:20 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=7d8a4eeacc534c8742e0b22d855aa73e5ab66b7f'>tests: Add Docker system test.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>