Use upstream utf8proc package, as suggested in
http://source.netsurf-browser.org/libutf8proc.git/commit/?id=770e329cceaf0620c7b482589a9b17ed1d19c16d

Work around upstream's lack of a pkg-config file and update API.

--- netsurf-3.6/Makefile
+++ netsurf-3.6/Makefile
@@ -527,10 +527,9 @@
 $(eval $(call pkg_config_find_and_add,libcss,CSS))
 $(eval $(call pkg_config_find_and_add,libdom,DOM))
 $(eval $(call pkg_config_find_and_add,libnsutils,nsutils))
-$(eval $(call pkg_config_find_and_add,libutf8proc,utf8proc))
 
 # Common libraries without pkg-config support
-LDFLAGS += -lz
+LDFLAGS += -lz -lutf8proc
 
 # Optional libraries with pkgconfig
 
--- netsurf-3.8/utils/idna.c
+++ netsurf-3.8/utils/idna.c
@@ -27,7 +27,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
-#include <libutf8proc/utf8proc.h>
+#include <utf8proc.h>
 
 #include "netsurf/inttypes.h"
 
--- netsurf-3.8/test/Makefile
+++ netsurf-3.8/test/Makefile
@@ -142,14 +142,15 @@
 	-Itest -Iinclude -Icontent/handlers -Ifrontends -I. -I.. \
 	-Dnsgtk \
 	$(SAN_FLAGS) \
-	$(shell pkg-config --cflags libcurl libparserutils libwapcaplet libdom libnsutils libutf8proc) \
+	$(shell pkg-config --cflags libcurl libparserutils libwapcaplet libdom libnsutils) \
 	$(LIB_CFLAGS)
 TESTCFLAGS := $(BASE_TESTCFLAGS) \
 	$(COV_CFLAGS) \
 	$(COV_CPPFLAGS)
 
 TESTLDFLAGS := -L$(TESTROOT) \
-	$(shell pkg-config --libs libcurl libparserutils libwapcaplet libdom libnsutils libutf8proc) -lz \
+	$(shell pkg-config --libs libcurl libparserutils libwapcaplet libdom libnsutils) \
+	$(LDFLAGS) \
 	$(SAN_FLAGS) \
 	$(LIB_LDFLAGS)\
 	$(COV_LDFLAGS)
nput type='hidden' name='id' value='a8c1d812a030f07dbc22afa12f82539c3152a9e2'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>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=a8c1d812a030f07dbc22afa12f82539c3152a9e2'>root</a>/<a href='/guix/log/gnu?id=a8c1d812a030f07dbc22afa12f82539c3152a9e2'>gnu</a>/<a href='/guix/log/gnu/packages?id=a8c1d812a030f07dbc22afa12f82539c3152a9e2'>packages</a>/<a href='/guix/log/gnu/packages/dlang.scm?id=a8c1d812a030f07dbc22afa12f82539c3152a9e2'>dlang.scm</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/gnu/packages/dlang.scm?id=a8c1d812a030f07dbc22afa12f82539c3152a9e2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-12-07 12:43:09 +0200'>2023-12-07</span></td><td><a href='/guix/commit/gnu/packages/dlang.scm?id=7e784c7495a94e9d12dfdc7354ef4825ff16e328'>gnu: dub: update to 1.33.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dlang.scm (dub): Update to 1.33.0.

Change-Id: Ie09f43329fa4a8d79f201f4b617e498d39adec6f
Signed-off-by: Efraim Flashner &lt;efraim@flashner.co.il&gt;
</span></span></td><td>Hugo Nobrega</td></tr>
<tr><td><span title='2023-12-02 20:39:28 +0200'>2023-12-02</span></td><td><a href='/guix/commit/gnu/packages/dlang.scm?id=766946d663bf0bfaf5d75eb2d8bc23205376eadd'>gnu: ldc: Update to 1.35.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dlang.scm (ldc-bootstrap): Update to 1.35.0.
[arguments]: Adjust configure-flags to not build shared libraries.
(ldc)[arguments]: Adjust configure-flags to remove defaults.  Adjust
'patch-paths-in-tests phase for another hardcoded /bin/bash.  Delete
another test.

Change-Id: Ie284a97ecda2689e6ed84a902eff990cfae8c195
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-12-02 20:39:22 +0200'>2023-12-02</span></td><td><a href='/guix/commit/gnu/packages/dlang.scm?id=fc7db2df40840e3020a9f4954f08f744390abf62'>gnu: ldc: Enable building on more architectures.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dlang.scm (ldc)[arguments]: In the custom phase
'fix-compiler-rt-library-discovery rewrite gnu-triplet-&gt;clang-arch to
pass-through unmatched architectures.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-12-02 12:35:01 +0100'>2023-12-02</span></td><td><a href='/guix/commit/gnu/packages/dlang.scm?id=aeb494322ca9dec4a4d66a7d063239c8536bd538'>gnu: d-tools: Update to 2.105.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>The previous version 2.100 was failing in `check` due to changes to the Phobos stdlib

* gnu/packages/dlang.scm (d-tools): Update to 2.105.3.

Change-Id: Id9e4580d555c735fb0eebe880928ef2f558f959e
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Hugo Nobrega</td></tr>