Mupen64Plus supports a single data directory and a single plugin directory in
its configuration, yet we need data and plugin files from a variety of
packages.  The best way to deal with this is to install all packages from
which data and plugin files are needed into one's profile, and point the
configuration there.  Hence, the ui-console package provides propagated inputs
for packages with the most important data and plugin files, and this patch
provides the user instructions on what needs to be done in order to have
Mupen64Plus find the relevant data and plugins.

--- a/src/plugin.c
+++ b/src/plugin.c
@@ -122,6 +122,22 @@ m64p_error PluginSearchLoad(m64p_handle ConfigUI)
     {
         const char *plugindir = (*ConfigGetParamString)(ConfigUI, "PluginDir");
         lib_filelist = osal_library_search(plugindir);
+        /* Guix specific */
+        if (lib_filelist == NULL)
+        {
+            DebugMessage(M64MSG_ERROR, "No plugins found in PluginDir path: %s", plugindir);
+            DebugMessage(M64MSG_ERROR,
+                         "\n\n"
+                         "*********************************\n"
+                         "*** Notice for GNU Guix users ***\n"
+                         "*********************************\n"
+                         "\n"
+                         "You might want to edit your mupen64plus.cfg (in $XDG_CONFIG_HOME by default)\n"
+                         "and set SharedDataPath to /path/to/my_guix_profile/share/mupen64plus and\n"
+                         "PluginDir to /path/to/my_guix_profile/lib/mupen64plus so that data and plugins\n"
+                         "are found.\n"
+                         "\n");
+        }
     }
 
     /* if still no plugins found, search some common system folders */
e='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=e2ac59f984d68f6d1011633df6d612d2bb54229f'>root</a>/<a href='/guix/log/tests?id=e2ac59f984d68f6d1011633df6d612d2bb54229f'>tests</a>/<a href='/guix/log/tests/networking.scm?id=e2ac59f984d68f6d1011633df6d612d2bb54229f'>networking.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/tests/networking.scm?id=e2ac59f984d68f6d1011633df6d612d2bb54229f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-10-30 18:15:54 -0400'>2019-10-30</span></td><td><a href='/guix/commit/tests/networking.scm?id=97bc3cbea5fc281a299c03eaaa3be5baf21ea673'>services: ntp: Ensure no double quotes are output to config file.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/networking.scm (ntp-server-&gt;string): Use the textual
representation of the values as printed by 'display' rather than 'write', to
avoid inserting double quotes in the generated config.
* tests/networking.scm (%ntp-server-sample): Add a comment and make one of the
options a string, to exercise the fix.
("ntp-server-&gt;string"): Move the expected value to the first argument.
("ntp configuration servers deprecated form"): Likewise.
("openntpd generated config string ends with a newline"): Likewise.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-09-08 23:15:32 +0900'>2019-09-08</span></td><td><a href='/guix/commit/tests/networking.scm?id=2625abc6aa5df66a6503e906b7592691452954f5'>services: openntpd: Add test for issue #3731.</a><span class='msg-avail'>...<span class='msg-tooltip'>See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37318.

* gnu/services/networking.scm (openntpd-configuration-&gt;string): New procedure,
extracted from top of the `openntpd-shepherd-service' to make it testable.
(openntpd-shepherd-service): Adapt following the move of the code to the above
procedure.
* tests/networking.scm: Add a test for the `openntpd-configuration-&gt;string'
procedure.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-09-08 23:15:31 +0900'>2019-09-08</span></td><td><a href='/guix/commit/tests/networking.scm?id=5658ae8a0ad5d988765944b7e783b2bdc23a7f48'>services: ntp: Support different NTP server types and options.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/networking.scm (ntp-server-types): New enum.
(&lt;ntp-server&gt;): New record type.
(ntp-server-&gt;string): New procedure.
(%ntp-servers): Define in terms of &lt;htp-server&gt; records.  Use the first
entrypoint server as a pool instead of a list of static servers.  This is more
resilient since a new server of the pool can be interrogated on every
request.  Add the 'iburst' options.
(ntp-configuration-servers): Define a custom accessor that warns but honors
the now deprecated server format.
(&lt;ntp-configuration&gt;): Use it.
(%openntpd-servers): New variable,
(&lt;openntpd-configuration&gt;): Use it, as a pool ('servers' field) instead of a
regular server.
* tests/networking.scm: New file.
* Makefile.am (SCM_TESTS): Register it.
* doc/guix.texi: Update documentation.
</span></span></td><td>Maxim Cournoyer</td></tr>