meson: move SDL and SDL-image detection to meson

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -422,8 +422,8 @@ curses=""
 docs=""
 fdt=""
 netmap="no"
-sdl=""
-sdl_image=""
+sdl="auto"
+sdl_image="auto"
 virtfs=""
 mpath=""
 vnc="yes"
@@ -1137,13 +1137,13 @@ for opt do
     # configure to be used by RPM and similar macros that set
     # lots of directory switches by default.
   ;;
-  --disable-sdl) sdl="no"
+  --disable-sdl) sdl="disabled"
   ;;
-  --enable-sdl) sdl="yes"
+  --enable-sdl) sdl="enabled"
   ;;
-  --disable-sdl-image) sdl_image="no"
+  --disable-sdl-image) sdl_image="disabled"
   ;;
-  --enable-sdl-image) sdl_image="yes"
+  --enable-sdl-image) sdl_image="enabled"
   ;;
   --disable-qom-cast-debug) qom_cast_debug="no"
   ;;
@@ -2435,7 +2435,7 @@ if test "$cocoa" = "yes"; then
         error_exit "Cocoa and GTK UIs cannot both be enabled at once"
     fi
     gtk=no
-    sdl=no
+    sdl=disabled
 fi
 
 # Some versions of Mac OS X incorrectly define SIZE_MAX
@@ -3334,125 +3334,6 @@ if test "$vte" != "no"; then
     fi
 fi
 
-##########################################
-# SDL probe
-
-# Look for sdl configuration program (pkg-config or sdl2-config).  Try
-# sdl2-config even without cross prefix, and favour pkg-config over sdl2-config.
-
-sdl_probe ()
-{
-  if $pkg_config sdl2 --exists; then
-    sdlconfig="$pkg_config sdl2"
-    sdlversion=$($sdlconfig --modversion 2>/dev/null)
-  elif has "$sdl2_config"; then
-    sdlconfig="$sdl2_config"
-    sdlversion=$($sdlconfig --version)
-  else
-    if test "$sdl" = "yes" ; then
-      feature_not_found "sdl" "Install SDL2-devel"
-    fi
-    sdl=no
-    # no need to do the rest
-    return
-  fi
-  if test -n "$cross_prefix" && test "$(basename "$sdlconfig")" = sdl2-config; then
-    echo warning: using "\"$sdlconfig\"" to detect cross-compiled sdl >&2
-  fi
-
-  cat > $TMPC << EOF
-#include <SDL.h>
-#undef main /* We don't want SDL to override our main() */
-int main( void ) { return SDL_Init (SDL_INIT_VIDEO); }
-EOF
-  sdl_cflags=$($sdlconfig --cflags 2>/dev/null)
-  sdl_cflags="$sdl_cflags -Wno-undef"  # workaround 2.0.8 bug
-  if test "$static" = "yes" ; then
-    if $pkg_config sdl2 --exists; then
-      sdl_libs=$($pkg_config sdl2 --static --libs 2>/dev/null)
-    else
-      sdl_libs=$($sdlconfig --static-libs 2>/dev/null)
-    fi
-  else
-    sdl_libs=$($sdlconfig --libs 2>/dev/null)
-  fi
-  if compile_prog "$sdl_cflags" "$sdl_libs" ; then
-    sdl=yes
-
-    # static link with sdl ? (note: sdl.pc's --static --libs is broken)
-    if test "$sdl" = "yes" && test "$static" = "yes" ; then
-      if test $? = 0 && echo $sdl_libs | grep -- -laa > /dev/null; then
-         sdl_libs="$sdl_libs $(aalib-config --static-libs 2>/dev/null)"
-         sdl_cflags="$sdl_cflags $(aalib-config --cflags 2>/dev/null)"
-      fi
-      if compile_prog "$sdl_cflags" "$sdl_libs" ; then
-	:
-      else
-        sdl=no
-      fi
-    fi # static link
-  else # sdl not found
-    if test "$sdl" = "yes" ; then
-      feature_not_found "sdl" "Install SDL2 devel"
-    fi
-    sdl=no
-  fi # sdl compile test
-}
-
-sdl_image_probe ()
-{
-    if test "$sdl_image" != "no" ; then
-        if $pkg_config SDL2_image --exists; then
-            if test "$static" = "yes"; then
-                sdl_image_libs=$($pkg_config SDL2_image --libs --static 2>/dev/null)
-            else
-                sdl_image_libs=$($pkg_config SDL2_image --libs 2>/dev/null)
-            fi
-            sdl_image_cflags=$($pkg_config SDL2_image --cflags 2>/dev/null)
-            sdl_image=yes
-
-            sdl_cflags="$sdl_cflags $sdl_image_cflags"
-            sdl_libs="$sdl_libs $sdl_image_libs"
-        else
-            if test "$sdl_image" = "yes" ; then
-                feature_not_found "sdl_image" "Install SDL Image devel"
-            else
-                sdl_image=no
-            fi
-        fi
-    fi
-}
-
-if test "$sdl" != "no" ; then
-  sdl_probe
-fi
-
-if test "$sdl" = "yes" ; then
-  sdl_image_probe
-else
-  if test "$sdl_image" = "yes"; then
-    echo "warning: SDL Image requested, but SDL is not available, disabling"
-  fi
-  sdl_image=no
-fi
-
-if test "$sdl" = "yes" ; then
-  cat > $TMPC <<EOF
-#include <SDL.h>
-#if defined(SDL_VIDEO_DRIVER_X11)
-#include <X11/XKBlib.h>
-#else
-#error No x11 support
-#endif
-int main(void) { return 0; }
-EOF
-  if compile_prog "$sdl_cflags $x11_cflags" "$sdl_libs $x11_libs" ; then
-    need_x11=yes
-    sdl_cflags="$sdl_cflags $x11_cflags"
-    sdl_libs="$sdl_libs $x11_libs"
-  fi
-fi
-
 ##########################################
 # RDMA needs OpenFabrics libraries
 if test "$rdma" != "no" ; then
@@ -7054,14 +6935,6 @@ if test "$have_x11" = "yes" && test "$need_x11" = "yes"; then
   echo "X11_CFLAGS=$x11_cflags" >> $config_host_mak
   echo "X11_LIBS=$x11_libs" >> $config_host_mak
 fi
-if test "$sdl" = "yes" ; then
-  echo "CONFIG_SDL=m" >> $config_host_mak
-  echo "SDL_CFLAGS=$sdl_cflags" >> $config_host_mak
-  echo "SDL_LIBS=$sdl_libs" >> $config_host_mak
-  if test "$sdl_image" = "yes" ; then
-      echo "CONFIG_SDL_IMAGE=y" >> $config_host_mak
-  fi
-fi
 if test "$cocoa" = "yes" ; then
   echo "CONFIG_COCOA=y" >> $config_host_mak
 fi
@@ -8453,6 +8326,7 @@ NINJA=$PWD/ninjatool $meson setup \
         -Dstrip=$(if test "$strip_opt" = yes; then echo true; else echo false; fi) \
         -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
         -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
+	-Dsdl=$sdl -Dsdl_image=$sdl_image \
         $cross_arg \
         "$PWD" "$source_path"