nfo, we need to do
     it ourselves for other systems.)
<li> Alpha OSF: Libtool (version 1.5) doesn't seem to recognise this system is
     "pic always" and ends up running gcc twice with the same options.  This
     is wasteful, but harmless.  Perhaps a newer libtool will be better.
<li> ARM: <code>umul_ppmm</code> in longlong.h always uses <code>umull</code>,
     but is that available only for M series chips or some such?  Perhaps it
     should be configured in some way.
<li> HPPA: config.guess should 