Re: Importance of GNAT.Source_Info

[Jere <jhb.chat@gmail.com>]

On Wednesday, January 8, 2020 at 11:38:28 AM UTC-5, Simon Wright wrote:
> 
> 
> > 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.

I might still include it.  My OCD doesn't want to put too much
GNAT specific stuff in if I don't need to, but then, I have to 
use GNAT specific stuff because it is an RTS for GNAT, so I am
probably just being silly here and I shouldn't worry about it and
just add it in too.