Use the old #'labels implementation if #'lexical-let changes lambdas. lisp/ChangeLog addition: 2011-12-13 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el (byte-compile-initial-macro-environment): If lexical let has played with our lambas, give up on constructing the compiled functions at compiled time, that strategy doesn't work.

#!/bin/sh
if
test -r $2
then
if
cmp $1 $2 > /dev/null
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi