Re: GNAT and no runtime

[wojtek@power.com.pl (Wojtek Narczynski)]

Hello,

> I'm trying to create a toy-OS in Ada and I'm still in the very begining
> yet.

Two good sources of information on GNAT runtime:

http://www.iuma.ulpgc.es/users/jmiranda/gnat-rts/main.htm
http://polaris.dit.upm.es/~str/proyectos/ork/

(The second may be more interesting for you)

> The "kernel" can boot (with the help of GRUB), I can print a "Hello
> world" text, and retrieve some informations from the bootloader.

Congrats! Did you use / tweak the b~main.ad[sb] (binder) code?

> Before going further, I would like to take advantage of Ada, so at least
> use exceptions.

I think you can "gnatmake" your program with -a (Consider all files)
to find out which files from the runtime are necessary for it to run.
For your Main procedure it gives:

s-stalib.adb, a-except.adb, system.ads, s-exctab.adb, s-memory.adb,
s-soflin.adb, ada.ads, a-elchha.adb, interfac.ads, s-mastop.adb,
s-secsta.adb, s-stoele.adb, s-traceb.adb, s-unstyp.ads, s-traent.adb,
s-htable.adb, s-crtl.ads, s-parame.adb, s-stache.adb, s-maccod.ads,
s-except.ads

It is very likely that you'll have to tweak some of those files.

By the way, do you know how to expand those filenames to full names,
or at least create symlinks with full length names? It would be so
much easier...

Regards,
Wojtek