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):
102a1f9bb013'>refs</a><a class='active' href='/guix/log/tests/elpa.scm'>log</a><a href='/guix/tree/tests/elpa.scm?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>tree</a><a href='/guix/commit/tests/elpa.scm?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>commit</a><a href='/guix/diff/tests/elpa.scm?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/elpa.scm'>
<input type='hidden' name='id' value='8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'/><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=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>root</a>/<a href='/guix/log/tests?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>tests</a>/<a href='/guix/log/tests/elpa.scm?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013'>elpa.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/elpa.scm?id=8d34df72cbd400b04cc4c8e2b3d9102a1f9bb013&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-18 22:51:55 +0100'>2021-12-18</span></td><td><a href='/guix/commit/tests/elpa.scm?id=f21c70bc9a41d000acf7d39a0813a3c7415517ca'>import: elpa: Support ‘upstream-name’ property.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/elpa.scm: (guix-package-&gt;elpa-name): New procedure.
  (latest-release): Use it.
* tests/elpa.scm ("guix-package-&gt;elpa-name: without 'upstream-name' property")
  ("guix-package-&gt;elpa-name: with 'upstream-name' property"): Test it.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Xinglu Chen</td></tr>
<tr><td><span title='2021-03-06 11:41:48 +0100'>2021-03-06</span></td><td><a href='/guix/commit/tests/elpa.scm?id=c05ceaf2b650d090cf39a048193505cb4e6bd257'>tests: do not hard code HTTP ports</a><span class='msg-avail'>...<span class='msg-tooltip'>Previously, test cases could fail if some process was listening
at a hard-coded port.  This patch eliminates most of these potential
failures, by automatically assigning an unbound port.  This should
allow for building multiple guix trees in parallel outside a build
container, though this is currently untested.

The test "home-page: Connection refused" in tests/lint.scm still
hardcodes port 9999, however.

* guix/tests/http.scm
  (http-server-can-listen?): remove now unused procedure.
  (%http-server-port): default to port 0, meaning the OS
  will automatically choose a port.
  (open-http-server-socket): remove the false statement claiming
  this procedure is exported and also return the allocated port
  number.
  (%local-url): raise an error if the port is obviously unbound.
  (call-with-http-server): set %http-server-port to the allocated
  port while the thunk is called.
* tests/derivations.scm: adjust test cases to use automatically
  assign a port.  As there is no risk of a port conflict now,
  do not make any tests conditional upon 'http-server-can-listen?'
  anymore.
* tests/elpa.scm: likewise.
* tests/lint.scm: likewise, and add a TODO comment about a port
  that is still hard-coded.
* tests/texlive.scm: likewise.

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