Re: Calling Ada from C

[Theodore Dennison <dennison@escmail.orl.mmc.com>]

Larry Kilgallen <kilgallen@eisner.decus.org> writes:
> In article <3l6j5k$h05@theopolis.orl.mmc.com>, Theodore Dennison <dennison@escmail.orl.mmc.com> writes:
> > Robert Dewar <dewar@cs.nyu.edu> writes:
> 
> >> GNAT certainly allows the main program to be in a language other than C
> >> with no restrictions (in fact the main program of the *all* GNAT programs
> >> is typically in C, since that's what the binder generates). But you can
> >> also have your own explicit main program.
> 
> > With NO restrictions? Including tasking? The C program doesn't have to make
> > any special calls to elaborate everything?
> 
> We have had two examples, both claiming that the respective compilers
> did not have such a restriction.  Perhaps it would be more of a service
> to list those implementations which _do_ have such a restriction.

Well, my claim is that gnat DOES have such a restriction. If your main
routine is not Ada (or rather, gnat's automaticly genereated C main
routine) then you have to manually call the routines to elaborate your
code (assuming you have elaboration code). 

SunAda requires you go through roughly the same process. Since SunAda
is VERDIX, there are probably many more implementations with the same
approach.

This is all getting a little off of the subject, which was helping 
someone with a SunAda problem. For my own (rather large) part in dragging
us off that subject, I apologize.

T.E.D. (structured programming bigot)