diff -up comm-esr38/mozilla/build/autoconf/config.guess.build-guess comm-esr38/mozilla/build/autoconf/config.guess
--- comm-esr38/mozilla/build/autoconf/config.guess.build-guess	2015-08-03 09:58:23.639750942 +0200
+++ comm-esr38/mozilla/build/autoconf/config.guess	2015-08-03 09:58:27.581743695 +0200
@@ -30,6 +30,7 @@ timestamp='2014-02-12'
 # http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
 #
 # Please send patches with a ChangeLog entry to config-patches@gnu.org.
+set -x
 
 me=`echo "$0" | sed -e 's,.*/,,'`