Update SDL to version 2.0.14.

libs/SDL2/test/configure.ac

@@ -1,16 +1,15 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(README)
+AC_INIT
+AC_CONFIG_SRCDIR([README])
 
 dnl Detect the canonical build and host environments
 AC_CONFIG_AUX_DIRS($srcdir/../build-scripts)
 AC_CANONICAL_HOST
 
 dnl Check for tools
-
 AC_PROG_CC
 
 dnl Check for compiler environment
-
 AC_C_CONST
 
 dnl We only care about this for building testnative at the moment, so these
@@ -42,7 +41,7 @@ case "$host" in
     *-*-aix*)
         ISUNIX="true"
         EXE=""
-        if test x$ac_cv_prog_gcc = xyes; then
+        if test x$ac_cv_c_compiler_gnu = xyes; then
             CFLAGS="-mthreads"
         fi
         SYS_GL_LIBS=""
@@ -71,6 +70,11 @@ case "$host" in
         MATHLIB=""
         SYS_GL_LIBS=""
         ;;
+    *-*-riscos* )
+        EXE=",e1f"
+        MATHLIB=""
+        SYS_GL_LIBS=""
+        ;;
     *)
         dnl Oh well, call it Unix...
         ISUNIX="true"
@@ -120,6 +124,9 @@ AC_MSG_CHECKING(for OpenGL support)
 have_opengl=no
 AC_TRY_COMPILE([
  #include "SDL_opengl.h"
+ #ifndef SDL_VIDEO_OPENGL
+ #error SDL_VIDEO_OPENGL
+ #endif
 ],[
 ],[
 have_opengl=yes
@@ -130,11 +137,10 @@ dnl Check for OpenGL ES
 AC_MSG_CHECKING(for OpenGL ES support)
 have_opengles=no
 AC_TRY_COMPILE([
- #if defined (__IPHONEOS__)
-    #include <OpenGLES/ES1/gl.h>
- #else
-    #include <GLES/gl.h>
- #endif /* __QNXNTO__ */
+ #include "SDL_opengles.h"
+ #ifndef SDL_VIDEO_OPENGL_ES
+ #error SDL_VIDEO_OPENGL_ES
+ #endif
 ],[
 ],[
 have_opengles=yes
@@ -145,12 +151,9 @@ dnl Check for OpenGL ES2
 AC_MSG_CHECKING(for OpenGL ES2 support)
 have_opengles2=no
 AC_TRY_COMPILE([
- #if defined (__IPHONEOS__)
-    #include <OpenGLES/ES2/gl.h>
-    #include <OpenGLES/ES2/glext.h>
- #else
-    #include <GLES2/gl2.h>
-    #include <GLES2/gl2ext.h>
+ #include "SDL_opengles2.h"
+ #ifndef SDL_VIDEO_OPENGL_ES2
+ #error SDL_VIDEO_OPENGL_ES2
  #endif
 ],[
 ],[
@@ -197,4 +200,5 @@ fi
 AC_SUBST(SDL_TTF_LIB)
 
 dnl Finally create all the generated files
-AC_OUTPUT([Makefile])
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT