--- linuxsampler/trunk/configure.in	2006/02/10 14:57:40	838
+++ linuxsampler/trunk/configure.in	2006/03/25 13:05:59	849
@@ -192,7 +192,10 @@
 AC_DEFINE_UNQUOTED(HAVE_JACK,$HAVE_JACK,[Define to 1 if you have JACK installed.])
 
 # ARTS
-sinclude([m4/arts.m4])
+
+m4_ifdef([m4_include(m4/arts.m4)],,
+        [sinclude([m4/arts.m4])])
+
 AM_PATH_ARTS(0.9.5, have_arts=1, have_arts=0)
 if test "$have_arts" = "1"; then
     have_audio_output_driver="true"
@@ -724,6 +727,20 @@
   AC_DEFINE_UNQUOTED(CONFIG_PROCESS_MUTED_CHANNELS, 1, [Define to 1 if you want to enable processing of muted channels.])
 fi
 
+AC_ARG_ENABLE(process-all-notes-off,
+  [  --disable-process-all-notes-off
+                          Disable interpretation of All-Notes-Off MIDI
+                          messages (default=on). By default LS will release
+                          all voices whenever it receives an All-Notes-Off
+                          MIDI message. You can disable this behavior, so
+                          that LS simply ignores such messages.],
+  [config_process_all_notes_off="no"],
+  [config_process_all_notes_off="yes"]
+)
+if test "$config_process_all_notes_off" = "yes"; then
+  AC_DEFINE_UNQUOTED(CONFIG_PROCESS_ALL_NOTES_OFF, 1, [Define to 1 if you want to enable processing of All-Notes-Off MIDI messages.])
+fi
+
 AC_ARG_ENABLE(interpolate-volume,
   [  --disable-interpolate-volume
                           Disable interpolation of volume modulation
@@ -898,6 +915,7 @@
 echo "# Override Filter Type: ${config_override_filter_type}"
 echo "# Assert GS SysEx Checksum: ${config_assert_gs_sysex_checksum}"
 echo "# Process Muted Channels: ${config_process_muted_channels}"
+echo "# Process All-Notes-Off MIDI message: ${config_process_all_notes_off}"
 echo "# Interpolate Volume: ${config_interpolate_volume}"
 echo "#-------------------------------------------------------------------#"
 echo "# Read './configure --help' or file 'configure.in' for details.     #"