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From: Eric Blake <ebb9 AT byu DOT net>
Subject: Re: ActiveState Perl and Cygwin How To
Date: Mon, 8 Feb 2010 15:42:11 +0000 (UTC)
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Csaba Raduly <rcsaba <at> gmail.com> writes:

> > I have been using Cygwin for quite some time now on Windows XP. I use
> > Perl extensively and the scripts I use/create are fairly portable.
> > I want to use ActiveState Perl as I can install many modules from CPAN
> > that give me trouble in Cygwin using cpan install ...

Ultimately, it makes more sense to use Cygwin's perl with cygwin, rather than a 
third-party perl that doesn't understand cygwin.

> P.S. Can somebody explain what ${1+"$@"} does and why it's used
> instead of just $@ ?
> I hate doing cargo cult programming.

http://www.gnu.org/software/autoconf/manual/autoconf.html#Shell-Substitutions

which documents how use of ${1+"$@"} works around bugs in older zsh and ksh. 
Actually, modern ksh apparently still has a different bug, which it does not 
work around:

http://lists.gnu.org/archive/html/automake-patches/2010-02/msg00005.html

so patches to the autoconf manual are welcome.  But this is starting to stray 
(WAY) off-topic for cygwin.

-- 
Eric Blake







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