Sender: tim AT picard DOT skynet DOT be
Message-ID: <3B6FBFFD.99705625@falconsoft.be>
Date: Tue, 07 Aug 2001 12:16:29 +0200
From: Tim Van Holder <tim DOT vanholder AT falconsoft DOT be>
Organization: Anubex N.V.
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To: "Peter J. Farley III" <pjfarley3 AT escape DOT com>, djgpp AT delorie DOT com
Subject: Re: automake help needed
References: <3b6cd296 DOT 9879890 AT news DOT escape DOT com> <9km37t$o7c$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE> <3b6f3c7d DOT 1918773 AT news DOT escape DOT com>
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Reply-To: djgpp AT delorie DOT com

"Peter J. Farley III" wrote:
> 
> Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de> wrote:
> <Snipped>
> >You're looking in the wrong place. You need an _automake_ conditional,
> >here, not a Make conditional. And automake only supports 'if', not
> >'ifdef'. Make operators 'ifdef' and 'ifeq' are GNU extensions which
> >automake doesn't use, in order to stay portable to non-GNU makes.
> >
> >I.e. you can't use GNU make conditionals in a Makefile.am, I think.
> 
> Thanks, Hans.  I was afraid that was the answer.  I've read over the
> automake conditionals docs, which I think I understand, so I guess
> I'll have to convert it to use them.

Problem is that they're not functionally equivalent.
Automake conditionals represent a configure-time decision; GNU make
conditionals are a run-time decision.  The latter allows you to change
make's behaviour by running

  make CONDVAR=value

but automake conditionals require a reconfigure to make such a change.

I just ran a little test and it seems there is a way out: automake
requires its conditionals to start in column 0, make doesnt.  So if
you merely precede your if/else/endif by a single space, automake
won't complain and the conditional will end up in the Makefile as
intended.

-- 
Tim Van Holder - Anubex N.V.
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