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Re: enable dependency tracking whenever available

From: Ralf Wildenhues
Subject: Re: enable dependency tracking whenever available
Date: Thu, 18 Jan 2007 21:49:12 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

* Jason Kraftcheck wrote on Thu, Jan 18, 2007 at 08:58:13PM CET:
> Ralf Wildenhues wrote:
> >   : ${enable_dependency_tracking=yes}

> Why not just

>   if test "x$enable_dependency_tracking" = "x"; then
>     enable_dependency_tracking=yes
>   fi
> Is it problematic or non-portable for some reason?

No, it's fine; in this particular case there is no semantic difference
between the two.

In general, the difference is that my line does not change the variable
$enable_dependency_tracking if it has been set to the empty value.

Hope that helps.


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