Re: What happens to DEC Ada?

[dewar@gnat.com (Robert Dewar)]

Wes Groleau <wwgrol@sparc01.ftw.rsc.raytheon.com> wrote in message news:<3B6B04F0.63E9602B@sparc01.ftw.rsc.raytheon.com>...
> > In my experience, a body of code has to get *pretty large* before a
> > recompile of the entire thing starts to become painful. (Especially with
> 
> We have about 20,000 Ada files, many of them VERY large,
> and if ALL are obsolete (forced to be), we can code all
> in ten hours on ONE processor with Apex.  Faster with
> GNAT.  When only a few hundred are obsolete, Apex takes
> longer to figure out which ones than it does to actually
> compiler them.


Note that one advantage of the very simple compilation model in GNAT
is that it is perfectly straightforward to make full use of multiple
processors. Indeed it often helps to use -j2, to launch two separate
compilation processes even if you have only one processor. I would
expect that your 10 hour compilation would take much less than an
hour on a big SGI multi-processor :-)