Re: Importance of GNAT.Source_Info

[Simon Wright <simon@pushface.org>]

Jere <jhb.chat@gmail.com> writes:

> I'm working on a baremetal RTS and while looking at
> https://wiki.osdev.org/Ada_Bare_bones, one of the files it suggests is
> part of the minimum set of RTS files is g-souinf.ads which contains
> the package GNAT.Source_Info.
>
> Does anyone know what part of the compiler requires this?  So far I
> haven't had GNAT barf at me for not having it while compiling the
> files I do have, but I don't want to leave it out if it is indeed
> necessary for something.  I didn't see any info on why it is
> necessary.  It's definitely useful in that it gives a lot of compile
> time values, but not sure why it would be a "required" file.  I'm
> assuming something will break without it, but don't know what.

I wouldn't have thought it'd be "required" either. If you want what it
provides, great, but there's no cost for actually 'with'ing it, because
it's preelaborated & (as someone has pointed out) all the subprograms
are intrinsic.