How to compile with GNAT?

["Tomislav Kitynski" <cromax@alchemy.panu.o.k.pl>]

Hi there.

Because of studies I D/L GNAT 2.7.2.1 for Amiga (GeekGadgets port), I have
also GCC installed. Uhm, there's not even a word in the tgz how to use this
compiler. I tried gnatmake hello.adb, but it outputs some trash to console
and soon crashes the system... 8( Well, I got e.g. such a proggy:

with ada.text_io;
use ada.text_io;
procedure Hello is
begin
        put("Hello world!");
end hello;

saved under hello.adb --- please help me to do it in GNAT!
-- 
 ** Cromax of Alchemy, proud Amiga user since 1988. | sf, grunge, ufo, **
 **  Coding, programming, painting, playing drums.  | vegetarian food. **