* Makefile.in (SHOPT): New macro, flag to ld to create
shared library. Defaults to "-shared".
(SHLIB): Use new SHOPT rather than hardcoded "-shared".
* configure.in: While configuring for *-*-beos*, if
--enable-shared is given, add beos.ml to list of makefile
frags.
* config/beos.ml: New file.
From-SVN: r31373
