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Date: Fri, 19 Jan 2018 19:32:57 +0000 (UTC)
From: "George Prekas via cygwin" <cygwin AT cygwin DOT com>
Reply-To: George Prekas <prekgeo AT yahoo DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Message-ID: <1759739558.1598055.1516390377125@mail.yahoo.com>
Subject: gnuplot dollar sign and command line arguments
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References: <1759739558 DOT 1598055 DOT 1516390377125 DOT ref AT mail DOT yahoo DOT com>

I noticed that gnuplot is configured with the flag --enable-backwards-compatibility in file gnuplot-5.2.2-1.cygport downloaded from http://mirror.switch.ch/ftp/mirror/cygwin/x86/release/gnuplot/gnuplot-5.2.2-1-src.tar.xz. This flag causes the following test case to behave differently under Cygwin and Ubuntu:

ubuntu$ echo 'print "$0"' > x
ubuntu$ gnuplot -c x 1
$0

cygwin$ echo 'print "$0"' > x
cygwin$ gnuplot -c x 1
1

More specifically the flag --enable-backwards-compatibility enables the backward compatible expansion of dollar sign expressions to command line arguments in gnuplot source files. Is there any specific reason that Cygwin chooses to enable this flag?

Regards,
George Prekas

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