--- a/common/autoconf/build-performance.m4	Tue Oct 11 09:49:31 2016 +0200
+++ b/common/autoconf/build-performance.m4	Wed Oct 12 11:49:09 2016 +0200
@@ -168,7 +168,6 @@
       [AS_HELP_STRING([--enable-ccache],
       [enable using ccache to speed up recompilations @<:@disabled@:>@])])
 
-  CCACHE=
   CCACHE_STATUS=
   AC_MSG_CHECKING([is ccache enabled])
   if test "x$enable_ccache" = xyes; then

--- a/common/autoconf/generated-configure.sh	Tue Oct 11 09:49:31 2016 +0200
+++ b/common/autoconf/generated-configure.sh	Wed Oct 12 11:49:09 2016 +0200
@@ -5103,7 +5103,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1476172133
+DATE_WHEN_GENERATED=1476265696
 
 ###############################################################################
 #
@@ -65251,7 +65251,6 @@
 fi
 
 
-  CCACHE=
   CCACHE_STATUS=
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking is ccache enabled" >&5
 $as_echo_n "checking is ccache enabled... " >&6; }