Fix SDL on evdev hosts (Anthony Liguori)

This patch corrects SDL support on X11 hosts using evdev.  It's losely based
on the previous patch by Dustin Kirkland and the evdev support code in gtk-vnc
written by Daniel Berrange.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6678 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/configure b/configure
index 62925d8..faacb8d 100755
--- a/configure
+++ b/configure
@@ -187,6 +187,7 @@
 aix="no"
 blobs="yes"
 fdt="yes"
+sdl_x11="no"
 
 # OS specific
 if check_define __linux__ ; then
@@ -805,6 +806,21 @@
     fi
 fi # -z $sdl
 
+if test "$sdl" = "yes" ; then
+cat > $TMPC <<EOF
+#include <SDL.h>
+#if defined(SDL_VIDEO_DRIVER_X11)
+#include <X11/XKBlib.h>
+#else
+#error No x11 support
+#endif
+int main(void) { return 0; }
+EOF
+    if $cc $ARCH_CFLAGS -o $TMPE ${OS_CFLAGS} `$sdl_config --cflags 2> /dev/null` $TMPC `$sdl_config --libs 2> /dev/null` > /dev/null 2>&1 ; then
+	sdl_x11="yes"
+    fi
+fi
+
 ##########################################
 # VNC TLS detection
 if test "$vnc_tls" = "yes" ; then
@@ -1393,6 +1409,8 @@
   echo "CONFIG_SDL=yes" >> $config_mak
   if test "$target_softmmu" = "no" -o "$static" = "yes"; then
     echo "SDL_LIBS=$sdl_static_libs" >> $config_mak
+  elif test "$sdl_x11" = "yes" ; then
+    echo "SDL_LIBS=`$sdl_config --libs` -lX11" >> $config_mak
   else
     echo "SDL_LIBS=`$sdl_config --libs`" >> $config_mak
   fi