From: rjs@moss.ATT.COM
Subject: Re: Conditional compilation
Date: 17 Jun 88 14:48:27 GMT [thread overview]
Message-ID: <28255@clyde.ATT.COM> (raw)
In-Reply-To: 909*haug@vax.runit.unit.uninett
In article <909*haug@vax.runit.unit.uninett>
haug%vax.runit.unit.uninett@TOR.NTA.NO (Steinar Haug) asks:
>I'm developing programs for both DEC VAX (VAX/VMS Ada compiler) and
>SUN-3 (Alsys Ada compiler). I need to use some form of conditional
>compilation.
>
>The LRM contains a reference [10.6] to conditional compilation but
>it seems rather cryptic and it is not obvious to me how I could use
>it in practice.
>
This seems to be the type of mechansim that 10.6 is referring to:
-- At the beginning of your source, or in a separate package that you
-- include in any module that needs to conditionally compile based on
-- the target, make the following declarations.
type MACHINE_NAME is (VAX, SUN3);
TARGET : constant MACHINE_NAME := VAX; -- Change this line to compile
-- for a different target
-- Then wherever you need to conditionally compile code based on the
-- target machine, use the following:
case TARGET is
when VAX =>
-- VAX specific code goes here.
when SUN3 =>
-- SUN-3 specific code goes here.
end case;
Of course this solution assumes that you can put all your conditional
stuff in a case statement. The compiler is allowed to not generate any
of the code for the obviously FALSE case.
Good Luck.
Robert Snyder
{ihnp4|clyde}!moss!rjs
(201) 386-4467
The above statements are my own thoughts and observations and are not
intended to represent my employer's position on the subject(s).
next prev parent reply other threads:[~1988-06-17 14:48 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
1988-06-13 0:24 Conditional compilation Steinar Haug
1988-06-17 13:53 ` rds
1988-06-22 0:44 ` Jeff Bartlett
1988-06-23 13:01 ` Arny B. Engelson
1988-06-27 18:01 ` Dave Seward
1988-06-29 13:32 ` brucej
1988-06-17 14:48 ` rjs [this message]
-- strict thread matches above, loose matches on Subject: below --
1989-12-12 0:08 conditional compilation Emery
2000-07-31 0:00 Matthew Woodcraft
2000-07-31 0:00 ` Marin D. Condic
2000-07-31 0:00 ` Ira D. Baxter
2000-08-01 0:00 ` Simon Brady
2000-07-31 0:00 ` Marin D. Condic
2000-08-01 0:00 ` Ted Dennison
2000-08-01 0:00 ` Robert A Duff
2000-08-01 0:00 ` Laurent Guerby
2000-08-02 0:00 ` Simon Brady
2000-08-02 0:00 ` Robert A Duff
2000-08-02 0:00 ` Brian Rogoff
2000-08-03 0:00 ` Robert A Duff
2000-08-02 0:00 ` Georg Bauhaus
2000-08-03 0:00 ` Robert A Duff
2000-08-03 0:00 ` Florian Weimer
2000-08-02 0:00 ` Simon Brady
2000-08-01 0:00 ` William J. Thomas
2000-08-02 0:00 ` Georg Bauhaus
2000-09-19 0:00 Conditional Compilation Kenneth Kueny
2000-09-19 0:00 ` Jeffrey Carter
2000-09-19 0:00 ` Samuel T. Harris
2000-09-20 0:44 ` Robert Dewar
2000-09-19 0:00 ` Ted Dennison
2000-09-19 0:00 ` David Starner
2000-09-19 0:00 ` Richard Riehle
2000-09-19 0:00 ` E. Robert Tisdale
2000-09-19 0:00 ` David Starner
2000-09-20 0:52 ` Robert Dewar
2000-09-19 0:00 ` Larry Kilgallen
2000-09-19 0:00 ` Jeff Allen
2000-09-20 0:49 ` Robert Dewar
2000-09-19 0:00 ` Bobby D. Bryant
2000-09-24 0:00 ` Robert Dewar
2000-09-20 0:47 ` Robert Dewar
2000-10-09 0:00 ` John McCabe
2000-09-20 1:33 ` tmoran
[not found] ` <8qauu3$7ei$1@nnrp1.deja.com>
2000-09-24 0:00 ` Robert Dewar
2000-09-25 2:45 ` Ted Dennison
2000-09-25 0:00 ` peter
[not found] ` <39CA31F2.E160F0D8@res.raytheon.com>
2000-09-24 0:00 ` Robert Dewar
2001-01-02 13:27 ` Andrew Hately
2001-01-02 16:46 ` Robert Dewar
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