Re: Conditional compilation in Ada?

[Frank Piron <empty@zero.nil>]

Am Tue, 16 Nov 2004 19:30:39 +0100 schrieb jtg <jtg77@poczta.onet.pl>:

> I am using Ada for many years now, but recently
> I stumbled upon a problem I cannot solve: I need
> some kind of conditional preprocessing, which is
> commonly used in C programs:
>
> #ifdef CONDITION
>   (some source code)
> #else
>   (other source code)
> #endif
>
> How to achieve it with Ada?

We had another problem concerning conditional compilation:
In a project containing roundabout 30 packages, we wanted
to switch on and off debugging messages for each package
individually and for certain levels (application defined
messages, exceptions, include callback procedures from the
GUI part, ...).
We tried with gnatprep but found it not suitable for this
task.
Finally we defined a certain "comment syntax" for the
messages and a debug.conf file format. Then we wrote
an "adaprep" for our purposes which read the debug.conf
- where you can switch on and off debugging for each
package (procedure/function) and set a level - and then
modifies the sources. The resulting sources with debugging
messages are copied to a separate code tree and built.
Sounds complicated but is done now with few commands.
The whole thing works fine for us, but compiling a new
"debug version" may take some time ...

Frank Piron