--- scripts/compiler_test.pl.orig	Wed Dec 31 16:46:24 2014
+++ scripts/compiler_test.pl	Thu Jan 22 01:32:39 2015
@@ -237,7 +237,7 @@ sub test_one ($) {
     # run Csmith until generate a big enough program
     while (1) {
         unlink $cfile;
-        my $cmd = "$CSMITH_HOME/src/csmith $CSMITH_USER_OPTIONS --output $cfile";
+        my $cmd = "${PREFIX}/bin/csmith $CSMITH_USER_OPTIONS --output $cfile";
         my ($res, $exitcode) = runit($cmd, $CSMITH_TIMEOUT,  "csmith.out"); 
         # print "after run csmith: $res, $exitcode\n";