Re: Libraries written in Ada

[Jeffrey Carter <spam@spam.com>]

It's certainly possible to write a package that can be used from C 
without worrying about runtime or initialization/finalization. Just 
follow some simple rules:

* The package must be Pure or Preelaborate

* The package cannot be generic

* Do not use any tasking constructs

* Do not propagate any exceptions

* Any initialization and finalization must be provided by operations 
that must be explicitly called by the user.

In other words, make it look just like a C library.

This is an issue that must be considered by people working on Ada OSes, 
where the interface to the OS is in Ada, and other languages must use a 
binding to the Ada version. It would be interesting to hear how they 
deal with the matter.

-- 
Jeff Carter
"We use a large, vibrating egg."
Annie Hall
44