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 */
>
<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=7541598fe28b93453814e19e52a778779717dc1b'>root</a>/<a href='/guix/log/gnu?id=7541598fe28b93453814e19e52a778779717dc1b'>gnu</a>/<a href='/guix/log/gnu/services?id=7541598fe28b93453814e19e52a778779717dc1b'>services</a>/<a href='/guix/log/gnu/services/mcron.scm?id=7541598fe28b93453814e19e52a778779717dc1b'>mcron.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/services/mcron.scm?id=7541598fe28b93453814e19e52a778779717dc1b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-06-14 18:35:17 +0200'>2021-06-14</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=f70c3429ed0064eb4554722b4a60031385fd6785'>services: Remove deprecated service procedures.</a><span class='msg-avail'>...<span class='msg-tooltip'>These service procedures were deprecated in January 2019, for instance
in commit 65a67bf711b14bc7200f6730c0f173375ca12974.

* gnu/services/avahi.scm (avahi-service): Remove.
* gnu/services/base.scm (console-keymap, guix-service)
(guix-publish-service, gpm-service, urandom-seed-service): Remove.
* gnu/services/desktop.scm (upower-service, colord-service): Remove.
* gnu/services/mcron.scm (mcron-service): Remove.
* gnu/services/messaging.scm (bitlbee-service): Remove.
* gnu/services/networking.scm (dhcp-client-service, ntp-service)
(tor-service): Remove.
* gnu/services/xorg.scm (slim-service, gdm-service): Remove.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-08-26 15:30:04 +0200'>2020-08-26</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=ef5ddb0e1715328713c2c9edad897f9a27de692f'>services: mcron: Validate jobs even in the presence of #:user.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a bug in 949672c923b6a3953471c446e0b19f30be335572 whereby jobs
specifying a #:user not available in the build environment would fail
validation.

Reported by Maxim Cournoyer.

* gnu/services/mcron.scm (job-files)[validated-file]: Add "prologue"
file and pass it to 'mcron --schedule'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-08-26 00:51:56 +0200'>2020-08-26</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=949672c923b6a3953471c446e0b19f30be335572'>services: mcron: Validate jobs at build time.</a><span class='msg-avail'>...<span class='msg-tooltip'>That way, run-time errors in the job specs are caught at build time.

* gnu/services/mcron.scm (job-file): Remove.
(job-files): New procedure.
(mcron-shepherd-services): Adjust accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-06 16:31:54 +0100'>2020-01-06</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=6a7c4636d4dec47eefa03c95da5a1315bd0e0413'>Adjust module autoloads.</a><span class='msg-avail'>...<span class='msg-tooltip'>In Guile &lt; 2.9.7, autoloading a module would give you access to all its
bindings.  In future versions, autoloading a module gives access only to
the listed bindings, as per #:select (see &lt;https://bugs.gnu.org/38895&gt;).

This commit adjusts autoloads to the new semantics, allowing Guix to be
built with Guile 2.9.7/2.9.8.

* guix/build/download.scm &lt;top level&gt;: Remove call to 'module-autoload!'.
(load-gnutls): New procedure.
(tls-wrap): Call it.
* guix/git.scm &lt;top level&gt;: Remove call to 'module-autoload!'.
(load-git-submodules): New procedure.
(update-submodules): Call it instead of 'resolve-interface'.
* gnu/bootloader/grub.scm: Replace #:autoload with #:use-module.
* gnu/packages.scm: Likewise.
* gnu/packages/ssh.scm: Likewise.
* gnu/packages/tex.scm: Likewise.
* gnu/services/cuirass.scm: Likewise.
* gnu/services/mcron.scm: Likewise.
* guix/lint.scm: Augment list of bindings in #:autoload.
* guix/scripts/build.scm: Likewise.
* guix/scripts/gc.scm: Likewise.
* guix/scripts/pack.scm: Likewise.
* guix/scripts/publish.scm: Likewise.
* guix/scripts/pull.scm: Likewise.
* guix/utils.scm: Remove unnecessary #:autoload clauses; replace one
of them with #:use-module.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-12-08 00:47:26 +0100'>2019-12-08</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=e7d45693d979fdb88dc6eed2a67797c4f8c4b420'>services: mcron: Add description.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/mcron.scm (mcron-service-type): Add description.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Robert Vollmert</td></tr>