Do not assume the SDL_image and SLD_mixer libraries are installed at the same
prefix reported by sdl-config, but instead get flags from the pkg-config files
installed with these libraries.

--- a/SConscript	2011-12-24 15:46:47.000000000 -0600
+++ b/SConscript	2014-06-12 21:20:45.702668330 -0500
@@ -199,7 +199,13 @@
                 self.fatal_error += "  * library 'png' not found\n"
 
     def configure_sdl(self):
-        if self.conf.CheckMyProgram('sdl-config'):
+        if self.conf.CheckMyProgram('pkg-config'):
+            self.conf.env.ParseConfig("pkg-config --cflags --libs sdl")
+            for sdllib in ['image', 'mixer']:
+                self.conf.env.ParseConfig("pkg-config --cflags --libs SDL_%s" % sdllib)
+                if not self.conf.CheckSDLLib(sdllib):
+                    self.fatal_error += "  * SDL library '%s' not found\n" % sdllib
+        elif self.conf.CheckMyProgram('sdl-config'):
             self.conf.env.ParseConfig("sdl-config  --cflags --libs | sed 's/-I/-isystem/g'")
             for sdllib in ['image', 'mixer']:
                 if not self.conf.CheckSDLLib(sdllib):
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<div class='path'>path: <a href='/guix/log/?id=04f084f2d40a962d3fbad3de817f4ce0df31ef44'>root</a>/<a href='/guix/log/tests?id=04f084f2d40a962d3fbad3de817f4ce0df31ef44'>tests</a>/<a href='/guix/log/tests/services?id=04f084f2d40a962d3fbad3de817f4ce0df31ef44'>services</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/services?id=04f084f2d40a962d3fbad3de817f4ce0df31ef44&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-10-07 12:41:05 -0400'>2023-10-07</span></td><td><a href='/guix/commit/tests/services?id=a7994ed58dc1ac3b57aa2df8508f05fd0748b3e0'>services: configuration: Use transducers within serialize-configuration.</a><span class='msg-avail'>...<span class='msg-tooltip'>Introduces 'base-transducer', a SRFI-171 based transducer that can be used as a
starting point for writing custom configuration record serializing procedures.

This also fixes the symbol maybe-value serialization test case.

* gnu/services/configuration.scm (empty-serializer?): New predicate.
(base-transducer, tfilter-maybe-value): New procedure.
(serialize-configuration): Adapt to use base-transducer.

* gnu/services/telephony.scm (jami-account-&gt;alist): Use transducers to skip
fields that are unserializable or whose field maybe-value is unset.

* tests/services/configuration.scm: Remove test-expect-fail.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Bruno Victal</td></tr>