sdl2.m4: Deprecate AM_PATH_SDL2 in favour of PKG_CHECK_MODULES AM_PATH_SDL2 doesn't add much beyond PKG_CHECK_MODULES, and having a special m4 macro for every library that you might depend on scales poorly. The macro does add special support for macOS frameworks, but that feature was broken for around 6 years without anyone noticing (#6141), and is likely to be only rarely useful according to comments on #6141. Resolves: #6140 Signed-off-by: Simon McVittie <smcv@collabora.com>
diff --git a/sdl2.m4 b/sdl2.m4
index 75b60f6..737a5e5 100644
--- a/sdl2.m4
+++ b/sdl2.m4
@@ -10,7 +10,7 @@
# * removed HP/UX 9 support.
# * updated for newer autoconf.
-# serial 2
+# serial 3
dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
@@ -19,6 +19,7 @@ AC_DEFUN([AM_PATH_SDL2],
[dnl
dnl Get the cflags and libraries from the sdl2-config script
dnl
+AC_MSG_WARN([[$0 is deprecated, please use PKG_CHECK_MODULES([SDL], [sdl2 >= MINIMUM_VERSION]) instead]])
AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
sdl_prefix="$withval", sdl_prefix="")
AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],