The following make rules do not work:

====
foo: foo.o
  libtool gcc foo.o -o foo

install: foo
  libtool cp foo /usr/bin

clean:
  libtool --mode=clean rm foo foo.o
====

Both the install and clean rules fail with "foo: no
such file or dir".  File "foo" does not exist because
we did not link with a libtool lib, and I only have
"foo.exe".

OTOH, "libtool install" works fine, but is not portable
on platforms without a BSD install (eg. Solaris).

It works fine for executables that link to a
libtool-built shared lib, though.