--- a/common/autoconf/basics.m4	Mon May 11 16:39:31 2015 +0530
+++ b/common/autoconf/basics.m4	Mon May 11 13:45:39 2015 +0200
@@ -1054,3 +1054,29 @@
 
   AC_SUBST(BASH_ARGS)
 ])
+
+# Code to run after AC_OUTPUT
+AC_DEFUN_ONCE([BASIC_POST_CONFIG_OUTPUT],
+[
+  # Try to move config.log (generated by autoconf) to the configure-support directory.
+  if test -e ./config.log; then
+    $MV -f ./config.log "$CONFIGURESUPPORT_OUTPUTDIR/config.log" 2> /dev/null
+  fi
+
+  # Rotate our log file (configure.log)
+  if test -e "$OUTPUT_ROOT/configure.log.old"; then
+    $RM -f "$OUTPUT_ROOT/configure.log.old"
+  fi
+  if test -e "$OUTPUT_ROOT/configure.log"; then
+    $MV -f "$OUTPUT_ROOT/configure.log" "$OUTPUT_ROOT/configure.log.old" 2> /dev/null
+  fi
+
+  # Move configure.log from current directory to the build output root
+  if test -e ./configure.log; then
+    echo found it
+    $MV -f ./configure.log "$OUTPUT_ROOT/configure.log" 2> /dev/null
+  fi
+
+  # Make the compare script executable
+  $CHMOD +x $OUTPUT_ROOT/compare.sh
+])