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):
03098e4d1611cef3b7123e'>refs</a><a class='active' href='/guix/log/gnu/packages/gd.scm'>log</a><a href='/guix/tree/gnu/packages/gd.scm?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>tree</a><a href='/guix/commit/gnu/packages/gd.scm?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>commit</a><a href='/guix/diff/gnu/packages/gd.scm?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/gd.scm'>
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<div class='path'>path: <a href='/guix/log/?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>root</a>/<a href='/guix/log/gnu?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>gnu</a>/<a href='/guix/log/gnu/packages?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>packages</a>/<a href='/guix/log/gnu/packages/gd.scm?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e'>gd.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/gd.scm?id=cfcccc8a2afd13eaf103098e4d1611cef3b7123e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-07-19 14:46:25 +0200'>2020-07-19</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=cd6aa38e7fc3e7d9fa1b79db041e8bf7cda39322'>gnu: perl-gd: Update to 2.72 [fixes CVE-2019-6977].</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (perl-gd): Update to 2.72.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-04-08 14:21:41 +0200'>2020-04-08</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=76125bc061b199936c60c348290a593ac3450945'>gnu: perl-gd: Do not rely on 'libgd-config'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (perl-gd)[native-inputs]: Add PERL-EXTUTILS-PKGCONFIG.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-03-26 22:35:35 +0100'>2020-03-26</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=736d772b82bfd693cd9412e2857e029fa6309269'>gnu: gd: Update to 2.3.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/gd-fix-tests-on-i686.patch: Adjust context.
* gnu/packages/patches/gd-CVE-2018-1000222.patch,
gnu/packages/patches/gd-CVE-2018-5711.patch,
gnu/packages/patches/gd-CVE-2019-6977.patch,
gnu/packages/patches/gd-CVE-2019-6978.patch,
gnu/packages/patches/gd-freetype-test-failure.patch: Delete files.
* gnu/packages/patches/gd-brect-bounds.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly
* gnu/packages/gd.scm (gd): Update to 2.3.0.
[source](patches): Remove obsolete.
* gnu/packages/gd.scm (gd):
[propagated-inputs]: Move LIBJPEG-TURBO and FONTCONFIG ...
[inputs]: ... here.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-03-14 13:13:40 +0100'>2020-03-14</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=961d2ee2695b38503b463d055e9c7edbcc0bf307'>Merge branch 'master' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-03-11 03:01:45 +0100'>2020-03-11</span></td><td><a href='/guix/commit/gnu/packages/gd.scm?id=44184f33562f483c32c9ec78db5cef26b3386cfd'>gnu: gd: Use HTTPS home page.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gd.scm (gd)[home-page]: Use HTTPS.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>