gegl: Use pkg-config for SDL

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-oe/recipes-graphics/gegl/gegl/pkgconfig.patch

@@ -0,0 +1,21 @@
+Index: gegl-0.2.0/configure.ac
+===================================================================
+--- gegl-0.2.0.orig/configure.ac	2012-04-02 21:56:49.000000000 +0000
++++ gegl-0.2.0/configure.ac	2014-07-17 21:34:15.312546602 +0000
+@@ -765,15 +765,7 @@
+ 
+ have_sdl="no"
+ if test "x$with_sdl" != "xno"; then
+-  AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
+-  if test "$SDL_CONFIG" = "no"; then
+-    have_sdl="no  (SDL library not found)"
+-    AC_MSG_RESULT([*** Check for SDL library failed.])
+-  else
+-    have_sdl="yes"
+-    SDL_CFLAGS=`$SDL_CONFIG --cflags`
+-    SDL_LIBS=`$SDL_CONFIG --libs`
+-  fi
++  PKG_CHECK_MODULES([SDL], [sdl], [have_sdl="yes"], [have_sdl="no  (SDL library not found)"])
+ fi
+ 
+ AM_CONDITIONAL(HAVE_SDL, test "$have_sdl" = "yes")

meta-oe/recipes-graphics/gegl/gegl_0.2.0.bb

@@ -11,7 +11,8 @@ PACKAGECONFIG ??= ""
 PACKAGECONFIG[jasper] = "--with-jasper,--without-jasper,jasper"
 PACKAGECONFIG[avformat] = "--with-libavformat,--without-libavformat,libav"
 
-SRC_URI = "http://ftp.gimp.org/pub/${BPN}/0.2/${BP}.tar.bz2"
+SRC_URI = "http://ftp.gimp.org/pub/${BPN}/0.2/${BP}.tar.bz2 \
+           file://pkgconfig.patch "
 SRC_URI[md5sum] = "32b00002f1f1e316115c4ed922e1dec8"
 SRC_URI[sha256sum] = "df2e6a0d9499afcbc4f9029c18d9d1e0dd5e8710a75e17c9b1d9a6480dd8d426"