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Re: Setting a bash variable from backtick operator fails
- From: cyg Simple <cygsimple at gmail dot com>
- To: cygwin at cygwin dot com
- Date: Tue, 27 Feb 2018 09:46:16 -0500
- Subject: Re: Setting a bash variable from backtick operator fails
- Authentication-results: sourceware.org; auth=none
- References: <29d3fea9-89e2-0eab-8bba-486b25fa875b@deathwyrm.com>
- Reply-to: cygwin at cygwin dot com
On 2/27/2018 9:12 AM, Numien wrote:
> While working on diagnosing an issue with autotools, I found Cygwin's
> bash seems to not be able to set a variable from backtick substitution,
> at least on my system (Cygwin x86_64, updated today, on Win10)
>
>
> On a Linux system it works as expected:
>
> $ test=`echo "x86_64-pc-cygwin" | sed 's/-[^-]*$//'`; echo $test
>
> x86_64-pc
>
>
> On a Cygwin system it doesn't:
>
> $ test=`echo "x86_64-pc-cygwin" | sed 's/-[^-]*$//'`; echo $test
>
> (no output)
>
Can anyone else confirm this? My version just works but I can't update
to a newer version for another couple of days.
$ uname -a
CYGWIN_NT-10.0 eboyd53ent-lt1 2.9.0(0.318/5/3) 2017-09-12 10:18 x86_64
Cygwin
>
> This also happens in scripts (where I originally encountered the
> problem), not just on the command line.
>
> Directly outputting it (echo `echo "x86_64-pc-cygwin" | sed
> 's/-[^-]*$//'`) works fine, it seems to be specifically related to
> setting a variable.
>
> Any suggestions?
Try as a simple test:
$ PATH=/usr/bin test=`echo "x86_64-pc-cygwin" | sed 's/-[^-]*$//'`; echo
$test
Maybe something in your environment is causing it and this would remove
the potential of something not Cygwin in the way.
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