--- linuxsampler/trunk/configure.in	2006/01/14 14:07:47	829
+++ linuxsampler/trunk/configure.in	2006/02/26 13:00:08	840
@@ -61,7 +61,6 @@
 # determine the right gcc switch for CPU specific optimizations
 # (only if the user did not provide one)
 CXX_CPU_SWITCH=
-echo "X $CXXFLAGS "
 if ! echo "X $CXXFLAGS " | grep -q -- " \(-march=\|-mcpu=\|-mtune=\|-arch=\)" ; then
   if test "$def_arch_x86" = 1; then
     CXX_CPU_SWITCH="-march=$target_cpu"
@@ -192,6 +191,18 @@
 AM_CONDITIONAL(HAVE_JACK, test $HAVE_JACK = 1)
 AC_DEFINE_UNQUOTED(HAVE_JACK,$HAVE_JACK,[Define to 1 if you have JACK installed.])
 
+# ARTS
+
+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 "$have_arts" = "1"; then
+    have_audio_output_driver="true"
+fi
+AM_CONDITIONAL(HAVE_ARTS, test "$have_arts" = "1")
+AC_DEFINE_UNQUOTED(HAVE_ARTS,$have_arts,[Define to 1 if you have aRts installed.])
+
 # MidiShare (Linux, OS X, Windows)
 AC_CHECK_HEADER(MidiShare.h,
     AC_CHECK_LIB(MidiShare, MidiCountEvs,
@@ -716,6 +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(interpolate-volume,
+  [  --disable-interpolate-volume
+                          Disable interpolation of volume modulation
+                          (default=on). With this enabled, the volume changes
+                          generated by for example the envelope generator
+                          will be smoother, minimizing the risk for audio
+                          clicks. Disable it to reduce CPU usage.],
+  [config_interpolate_volume="no"],
+  [config_interpolate_volume="yes"]
+)
+if test "$config_interpolate_volume" = "yes"; then
+  AC_DEFINE_UNQUOTED(CONFIG_INTERPOLATE_VOLUME, 1, [Define to 1 if you want to enable interpolation of volume modulation.])
+fi
+
 
 ###########################################################################
 # Automatic Benchmarks (to detect the best algorithms for the system)
@@ -876,6 +901,7 @@
 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 "# Interpolate Volume: ${config_interpolate_volume}"
 echo "#-------------------------------------------------------------------#"
 echo "# Read './configure --help' or file 'configure.in' for details.     #"
 echo "#####################################################################"