* Define USE_SDL and USE_OPENCV in addition to USE_IMLIB2.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2259 92316355-f0b4-4df1-b90c-862c8a59935f

configure.ac

@@ -69,6 +69,9 @@ AC_CHECK_HEADERS(SDL_image.h,
  [ac_cv_my_have_sdl="yes"],
  [ac_cv_my_have_sdl="no"])
 CPPFLAGS="${save_CPPFLAGS}"
+if test "${ac_cv_my_have_sdl}" != "no"; then
+  AC_DEFINE(USE_SDL, 1, Define to 1 to use SDL_image)
+fi
 AM_CONDITIONAL(USE_SDL, test "${ac_cv_my_have_sdl}" = "yes")
 
 # Use OpenCV?
@@ -82,6 +85,9 @@ AC_CHECK_HEADERS(cv.h,
  [ac_cv_my_have_opencv="yes"],
  [ac_cv_my_have_opencv="no"])
 CPPFLAGS="${save_CPPFLAGS}"
+if test "${ac_cv_my_have_opencv}" != "no"; then
+  AC_DEFINE(USE_OPENCV, 1, Define to 1 to use OpenCV)
+fi
 AM_CONDITIONAL(USE_OPENCV, test "${ac_cv_my_have_opencv}" = "yes")
 
 # Use Imlib2?