caca doesn't use x11 on OSX

modules/video_output/Modules.am

@@ -136,8 +136,10 @@ libcaca_plugin_la_SOURCES = caca.c
 libcaca_plugin_la_CFLAGS = $(AM_CFLAGS) $(CACA_CFLAGS)
 libcaca_plugin_la_LIBADD = $(AM_LIBADD) $(CACA_LIBS)
 if !HAVE_WIN32
+if !HAVE_DARWIN
 libcaca_plugin_la_LIBADD += $(X_LIBS) $(X_PRE_LIBS) -lX11
 endif
+endif
 libcaca_plugin_la_DEPENDENCIES =
 EXTRA_LTLIBRARIES += libcaca_plugin.la
 libvlc_LTLIBRARIES += $(LTLIBcaca)

modules/video_output/caca.c

@@ -34,7 +34,7 @@
 #include <vlc_plugin.h>
 #include <vlc_vout_display.h>
 #include <vlc_picture_pool.h>
-#ifndef WIN32
+#if !defined(WIN32) && !defined(__APPLE__)
 # ifdef X_DISPLAY_MISSING
 #  error Xlib required due to XInitThreads
 # endif