* configure.ac (makeinfo): Use basic regexp. Avoid autoconf errors on empty version strings. Report version found if insufficient. Lightly tested.

#!/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