Fixes spurious dependency as reported in Debian bug #375822
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=375822

This patch also included in Mandriva.

>There is a spurious dependency in the output of sdl-config --libs:
>
>-L/usr/lib -lSDL -lpthread
>
>-lpthread is _not_ needed in --libs (since the SDL _interface_ doesn't
>need pthread functions) and just brings an unneeded dependency. It
>should be used only for linking libSDL.so itself, and put in sdl-config
>--static-libs (for static linking).

Adapted for Gentoo by Peter Alfredsen

--- SDL-1.2.11.orig/sdl-config.in	2007-03-05 17:30:51.000000000 +0100
+++ SDL-1.2.11/sdl-config.in	2007-03-05 17:54:05.000000000 +0100
@@ -47,11 +47,11 @@
 @ENABLE_SHARED_TRUE@      if test x"${prefix}" != x"/usr" ; then
 @ENABLE_SHARED_TRUE@          libdirs="-L@libdir@"
 @ENABLE_SHARED_TRUE@      else
 @ENABLE_SHARED_TRUE@          libdirs=""
 @ENABLE_SHARED_TRUE@      fi
-@ENABLE_SHARED_TRUE@      echo $libdirs @SDL_RLD_FLAGS@ @SDL_LIBS@
+@ENABLE_SHARED_TRUE@      echo $libdirs @SDL_RLD_FLAGS@ -lSDL
 @ENABLE_SHARED_TRUE@      ;;
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_TRUE@    --static-libs)
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_FALSE@    --libs|--static-libs)
 @ENABLE_STATIC_TRUE@      echo -L@libdir@ @SDL_RLD_FLAGS@ @SDL_STATIC_LIBS@
 @ENABLE_STATIC_TRUE@      ;;
--- SDL-1.2.11.orig/sdl.pc.in	2006-06-20 07:49:00.000000000 +0200
+++ SDL-1.2.11/sdl.pc.in	2007-03-05 17:54:38.000000000 +0100
@@ -8,7 +8,7 @@
 Name: sdl
 Description: Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.
 Version: @SDL_VERSION@
 Requires:
 Conflicts:
-Libs: -L${libdir} @SDL_RLD_FLAGS@ @SDL_LIBS@
+Libs: -L${libdir} @SDL_RLD_FLAGS@ -lSDL
 Cflags: -I${includedir}/SDL @SDL_CFLAGS@