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Re: ${} and $()
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From: |
Ralf Wildenhues |
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Subject: |
Re: ${} and $() |
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Date: |
Sun, 19 Aug 2007 22:17:59 +0200 |
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User-agent: |
Mutt/1.5.13 (2006-08-11) |
Hello Bob, Jan, all,
* Bob Proulx wrote on Sun, Aug 19, 2007 at 10:09:28PM CEST:
> Jan Engelhardt wrote:
> > is there any real difference between $(var) and ${var}, and is the
> > latter as much POSIX as the first?
>
> Is there any reason not to use $(var) and simply play it safe since
> that is the traditional Unix make behavior? Then all worries about
> whether the builder's make will handle ${var} the same as $(var) are
> removed. If it were me I would play it safe.
I don't know about any issues wrt. ${var}, so I don't see what you would
be guarding against. OTOH, using ${var} makes it possible to share some
snippets in code intended for make, shell, perl. Which is for example
one reason Autoconf defines installations directories such as bindir as
'${exec_prefix}/bin'.
Cheers,
Ralf