On 04/09/2015 12:49 AM, Paul Eggert wrote:
> Eric Blake wrote:
>> test ${var+y}
>
> Hah! Here's something that's one byte shorter:
>
> ${var+:} [ ]
>
> It may be clearer to write it more in the style you used:
>
> [ ${var+y} ]
>
> Both of these work with Solaris 10 /bin/sh.But both become more difficult to express in autoconf, where [] also has meaning to m4 quoting. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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