Add pkg-config check for SDL lib and fallback to deprecated sdl-config

config.m4

@@ -36,27 +36,30 @@ if test "$PHP_SDL" != "no"; then
   fi
   dnl }}}
 
+  AC_MSG_CHECKING(for SDL2 library)
+
   if test "$PHP_SDL" == "yes"; then
-    AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no)
+      PKG_CHECK_MODULES([SDL2], [sdl2 < 3.0])
+      PHP_EVAL_INCLINE($SDL2_CFLAGS)
+      PHP_EVAL_LIBLINE($SDL2_LIBS, SDL_SHARED_LIBADD)
+      AC_MSG_RESULT(using SDL2 version `$PKG_CONFIG --modversion`)
   else
     SDL2_CONFIG="$PHP_SDL"
-  fi
-
-  AC_MSG_CHECKING(for SDL2 library)
-  if test -x "$SDL2_CONFIG" ; then
-    SDL2_VERSION=`$SDL2_CONFIG --version`
-    AC_MSG_RESULT(using SDL2 version $SDL2_VERSION)
-    PHP_EVAL_INCLINE(`$SDL2_CONFIG --cflags`)
-    PHP_EVAL_LIBLINE(`$SDL2_CONFIG --libs`, SDL_SHARED_LIBADD)
-  else
-    AC_MSG_ERROR(Cannot find sdl2-config)
+    if test -x "$SDL2_CONFIG" ; then
+      SDL2_VERSION=`$SDL2_CONFIG --version`
+      AC_MSG_RESULT(using SDL2 version $SDL2_VERSION)
+      PHP_EVAL_INCLINE(`$SDL2_CONFIG --cflags`)
+      PHP_EVAL_LIBLINE(`$SDL2_CONFIG --libs`, SDL_SHARED_LIBADD)
+    else
+      AC_MSG_ERROR(Cannot find sdl2-config)
+    fi
   fi
 
   PHP_SUBST(SDL_SHARED_LIBADD)
   AC_DEFINE(HAVE_SDL2, 1, [ ])
 
-  PHP_CHECK_LIBRARY(SDL2, SDL_GetRevisionNumber, [
-    AC_DEFINE(HAVE_SDL_GETREVISIONNUMBER, 1, [ ])
+  PHP_CHECK_LIBRARY(SDL2, SDL_GetRevision, [
+    AC_DEFINE(HAVE_SDL_GETREVISION, 1, [ ])
   ])
 
   SDL_SOURCE_FILES="src/blendmode.c \
@@ -70,7 +73,7 @@ if test "$PHP_SDL" != "no"; then
 	src/messagebox.c \
 	src/mouse.c \
 	src/mutex.c \
-	src/php_sdl.c \
+	php_sdl.c \
 	src/pixels.c \
 	src/platform.c \
 	src/power.c \
@@ -86,5 +89,4 @@ if test "$PHP_SDL" != "no"; then
 	src/window.c"
 
   PHP_NEW_EXTENSION(sdl, $SDL_SOURCE_FILES, $ext_shared,, $PHP_SDL_CFLAGS)
-  PHP_ADD_BUILD_DIR($ext_builddir/src)
 fi

src/php_sdl.c → php_sdl.c

@@ -17,30 +17,30 @@
 
 #include "php_sdl.h"
 
-#include "blendmode.h"
-#include "cpuinfo.h"
-#include "error.h"
-#include "event.h"
-#include "filesystem.h"
-#include "glcontext.h"
-#include "keyboard.h"
-#include "messagebox.h"
-#include "mouse.h"
-#include "mutex.h"
-#include "platform.h"
-#include "power.h"
-#include "pixels.h"
-#include "rect.h"
-#include "render.h"
-#include "rwops.h"
-#include "sdl.h"
-#include "shape.h"
-#include "surface.h"
-#include "timer.h"
-#include "version.h"
-#include "video.h"
-#include "window.h"
-#include "joystick.h"
+#include "src/blendmode.h"
+#include "src/cpuinfo.h"
+#include "src/error.h"
+#include "src/event.h"
+#include "src/filesystem.h"
+#include "src/glcontext.h"
+#include "src/keyboard.h"
+#include "src/messagebox.h"
+#include "src/mouse.h"
+#include "src/mutex.h"
+#include "src/platform.h"
+#include "src/power.h"
+#include "src/pixels.h"
+#include "src/rect.h"
+#include "src/render.h"
+#include "src/rwops.h"
+#include "src/sdl.h"
+#include "src/shape.h"
+#include "src/surface.h"
+#include "src/timer.h"
+#include "src/version.h"
+#include "src/video.h"
+#include "src/window.h"
+#include "src/joystick.h"
 
 #ifdef COMPILE_DL_SDL
 ZEND_GET_MODULE(sdl)