From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00,INVALID_DATE
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,4377c8caa0e42551
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 1995-01-09 03:05:41 PST
Path: 
 bga.com!news.sprintlink.net!howland.reston.ans.net!news2.near.net!news.mathworks.com!panix!cmcl2!thecourier.cims.nyu.edu!thecourier.cims.nyu.edu!nobody
From: dewar@cs.nyu.edu (Robert Dewar)
Newsgroups: comp.lang.ada
Subject: Re: GNAT NT & Ada.Direct_IO
Date: 9 Jan 1995 01:07:03 -0500
Organization: Courant Institute of Mathematical Sciences
Message-ID: <3eqjq7$kpe@gnat.cs.nyu.edu>
References: <3eqe9u$n0b@msunews.cl.msu.edu>
NNTP-Posting-Host: gnat.cs.nyu.edu
Date: 1995-01-09T01:07:03-05:00
List-Id: <comp.lang.ada>

Mark, please be sure to send basic questions like this to gnat-report
where they will get answered immediately.

THe answer to your question about direct_io is trivial, it is a generic unit,
and compiling generic units, like compiling specs, with GNAT does not
generate code.

It is only when a generic is instantiated that code is generated.

Actually in the case of generics, but not package specs, it is conceivable
that this will change in the future. Note also that there is a current
bug which causes a null object file to be generated for generics.

But anyway, the bottom line for the moment is use the -gnatc when
compiling generics, since no code is generated. THe only reason for
compiling a generic unit like direct_io is to check it out semantically.

P.S. the capitlization is because this particular error message always
generates mixed case output. It is too much trouble to copy the actual
capitalization from he source in this particular case.