Equivalent to pkglispdir?

[Tim Landscheidt]

Hi,

I'm trying to convert the build system for the Emacs Multi-
media System (EMMS) to autoconf/automake. It installs
40+ files beneath /usr/share/emacs/site-lisp, and so the
existing Makefiles put them in a subdirectory called "emms".

  Along the lines of pkg..., it would be really nice if this
could be achieved by using "pkglisp_LISP" instead of
"lisp_LISP", but automake complains about "pkglispdir" being
not defined (and indeed the manual doesn't say otherwise).

  What is the proper way to solve this? Any pointers to ex-
isting Emacs add-ons using automake would also be greatly
appreciated :-).

TIA,
Tim