Re: Naive question about system dependencies

[comar@cs.nyu.edu (Cyrille Comar)]

dennison@romulus23.DAB.GE.COM (Ted Dennison) writes:
: In article <35f559$mad@info.epfl.ch>, weber@lglsun.epfl.ch (Mats Weber) writes:
: |> sql_interface.ads                 (common package spec)
: |> sql_interface-oracle-vms.adb      (body for Oracle under VMS)
: |> sql_interface-sybase-unix.adb     (body for Sybase under UNIX)
: |> 
: |> Despite the amount of code duplication, I prefer this to a preprocessor
: |> approach.
: 
: This won't work under GNAT. GNAT doesn't allow you to use "a good file naming
: convention", you have to use theirs.
: 
: T.E.D.

I don't understand this kind of comment... GNAT is a compiler, nothing else.
you can always write tools around it to do what you want...
In this case a 2 line script will do the job.
      gnatchop whatever_fancy_name_you_want tmp
      gcc tmp/*.ad[sb]
Or you can include the name changes in your Makefile...

It is true that the simplest approach with gnat is to use different
directories. In the previous case :

sql_interface.ads                 (common package spec)
oracle-vms/sql_interface.adb      (body for Oracle under VMS)
sybase-unix/sql_interface.adb     (body for Sybase under UNIX)

and then use either environment variables or -I (not implemented yet) to find
the right body for your spec. This is the simplest approach but it is in NO WAY
required by GNAT...
------------------------------------------------------------------------
Cyrille Comar,                                  E-mail: comar@cs.nyu.edu
Gnat Project                                    US phone: (212) 998-3489

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------------------------------------------------------------------------
Cyrille Comar,                                  E-mail: comar@cs.nyu.edu
Gnat Project                                    US phone: (212) 998-3489