support; in particular don't use the C compiler within the bootstrap
ADA installation
(gcc installs "fixinclude" headers which are not portable across
OS versions)
fixes PR pkg/22470 by John R. Shannon
PKGNAME if we are installing to an alternative location so that the
pkg system doesn't complain about conflicts.
Now it is possible to install a gcc3 tree to some location where
it can be used to bootstrap another instance of itself...
work on mips and powerpc at least.
See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9091.
The fix therein (which was applied to the 3.3 branch does not really fix
the underlying problem, and is for powerpc only.
While I'm not an ada expert and this pkg wasn't used for more than
bootstrapping itself, I'd consider gnatpsta dispensable.
-USE_NEW_TEXINFO, saves some patches
-symlink libiberty.a into build tree instead of buildlink/lib,
saves some patches
-put common make rules into Makefile.common (for all) and
buildaddon.mk (for all but the base "c" pkg)
