--- a/common/autoconf/compare.sh.in	Tue May 17 18:18:18 2016 +0200
+++ b/common/autoconf/compare.sh.in	Wed May 04 15:29:01 2016 +0200
@@ -48,6 +48,7 @@
 export FILE="@FILE@"
 export FIND="@FIND@"
 export GREP="@GREP@"
+export GUNZIP="@GUNZIP@"
 export LDD="@LDD@"
 export LN="@LN@"
 export MKDIR="@MKDIR@"
@@ -63,10 +64,11 @@
 export SORT="@SORT@"
 export STAT="@STAT@"
 export STRIP="@STRIP@ @STRIPFLAGS@"
+export TAR="@TAR@"
 export TEE="@TEE@"
 export UNIQ="@UNIQ@"
 export UNPACK200="@FIXPATH@ @BOOT_JDK@/bin/unpack200"
-export UNARCHIVE="@UNZIP@ -q"
+export UNARCHIVE="@UNZIP@ -q -o"
 
 export SRC_ROOT="@TOPDIR@"
 export OUTPUT_ROOT="@OUTPUT_ROOT@"