Index: configure
===================================================================
--- configure	(revision e24f13ade68e4ef547f6f560caddb2890c2f4a3e)
+++ configure	(revision d2a182e22a6187c21dc293af722eeedd8b30f756)
@@ -671,4 +671,8 @@
 INSTALL_SCRIPT
 INSTALL_PROGRAM
+AM_BACKSLASH
+AM_DEFAULT_VERBOSITY
+AM_DEFAULT_V
+AM_V
 target_alias
 host_alias
@@ -712,4 +716,5 @@
 ac_user_opts='
 enable_option_checking
+enable_silent_rules
 enable_maintainer_mode
 with_backend_compiler
@@ -1346,4 +1351,6 @@
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-silent-rules          less verbose build output (undo: `make V=1')
+  --disable-silent-rules         verbose build output (undo: `make V=0')
   --disable-maintainer-mode  disable make rules and dependencies not useful
 			  (and sometimes confusing) to the casual installer
@@ -2407,4 +2414,43 @@
 #AC_CONFIG_SRCDIR([src/main.cc])
 ac_config_headers="$ac_config_headers config.h"
+
+# Check whether --enable-silent-rules was given.
+if test "${enable_silent_rules+set}" = set; then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in
+yes) AM_DEFAULT_VERBOSITY=0;;
+no)  AM_DEFAULT_VERBOSITY=1;;
+*)   AM_DEFAULT_VERBOSITY=1;;
+esac
+am_make=${MAKE-make}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+$as_echo_n "checking whether $am_make supports nested variables... " >&6; }
+if ${am_cv_make_support_nested_variables+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if $as_echo 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+$as_echo "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'