Building latest Open Dylan for Mac OS X

Hey all. I have gotten Open Dylan to compile on Mac OS X. The diff  
(against revision 11530) is at
<http://idisk.mac.com/d_j_v-Public/Under%20Development/fundev.diff 
 >. Applying the diff gives you build instructions in README.txt.

I will do the check-in a few days from now.

The sticking point was the copy-bytes argument order change in the  
core libraries. Originally, libraries from 1.0beta4 were being linked  
in to the latest version (I'll call it beta5) to fill in for beta5  
libraries that hadn't been compiled yet. Because of the argument order  
change, the copy-bytes methods and their callers weren't always in  
agreement about which argument meant what. This led to core dumps and  
anguish.

The solution was to rewrite parts of the build system. Beta5 gets rid  
of the 4 bootstrap stages and replaces it with a 2-stage process. In  
the first stage (the bootstrap stage), the beta4 libraries and  
compiler are used to build the minimal beta5 libraries and compiler.  
In the second stage (the installation stage), the beta5 compiler and  
libraries from the first stage are used to build the beta5 libraries  
and compiler in the installation location. This allows the  
installation to benefit from any extra optimizations introduced by new  
compiler code.

To keep the beta5 libraries from linking to the beta4 libraries, I  
altered admin/build/fdmake.pl to do a dependency analysis to ensure  
that prerequisite beta5 libraries are always built before their  
dependents are. Since Dylan doesn't allow circular dependencies, this  
works out, and the beta4 libraries are never needed or linked in.