Q: How to build from source tree w/shared files, using GNAT?

Q: How to build from source tree w/shared files, using GNAT?

[John M. Mills]

Hello --

I have a question on using existing source trees with GNAT (3.05, migrated 
to 3.09, and now  moving to 3.10).

We have inherited a tree of sources with some files shared between branches,
roughly as follows:

        +-- processor 1        spec1.1, spec1.2, body1.1, body1.2, ...
        |
        |
  TOP --+-- processor 2        spec2.1, spec2.2, body2.1 <- with 1.1, ...,
        |                                        body2.2 <- with 1.x, ...,
                                                 ...
         (etc)

I don't know yet whether the cross-branch "with"s include object modules,
or only data types. The original developers are using APEX to manage their
builds; I am unfamiliar with the requirements of APEX, other than noticing
of a file in TOP which lists, for a given sub-directory, a set of "Import"s
which I expect are the branches containing units required in building that
sub-directory's executable(s).

Is this as simple as it would be for 'C' with '-I', '-l' and '-L' directives?
How do I set up dependency checking?

Sorry for what may be a trivial question, and I would be happy to pursue GNAT
or other documentation if someone will provide a pointer.  Thanks.

Regards -- john mills

-- 
John M. Mills, Senior Research Engineer   --   john.m.mills@gtri.gatech.edu
   Georgia Tech Research Institute, Georgia Tech, Atlanta, GA 30332-0834
        Phone contacts: 404.894.0151 (voice), 404.894.6258 (FAX)
           "Lies, Damned Lies, Statistics, and Simulations."

Re: Q: How to build from source tree w/shared files, using GNAT?

[Robert Dewar]

<<Is this as simple as it would be for 'C' with '-I', '-l' and '-L' directives?
How do I set up dependency checking?>>

Yes, it is as you say as simple as it would be for C, the directives are
the same. gnatmake will do all the necessary dependency checking automatically.

Re: Q: How to build from source tree w/shared files, using GNAT?

[Robert Dewar]

<<Is this as simple as it would be for 'C' with '-I', '-l' and '-L' directives?
How do I set up dependency checking?>>

If you have a support contract from ACT, then this is the sort of question
that should be directed to report@gnat.com in the usual manner. If not, you
probably will find more likelihood of getting help by subscribing to
chat@gnat.com (send a subscribe command to chat-request@gnat.com) since
quite a few GNAT users read and provide informatl help there, and can solve
some of your problems for you -- obviously there are no guarantees in the
latter case, but some useful advice has definitely been available there in
the past.

Robert Dewar
Ada Core Technologies