Possible patch for sox build failure on 10.7

[Jan Stary]

On Aug 09 08:44:02, ken.cunningham.webuse at gmail.com wrote:
> 
> On 2017-08-09, at 1:05 AM, Joshua Root wrote:
> 
> > Perhaps someone with access to a 10.7 machine could try this.
> > 
> > - Josh
> > <sox-portfile.diff>
> 
> Yep, that should do it.  Deactivating MacPorts grep, sox build fails - activating MacPorts grep fixes the build on 10.7. I have other things installed that get pulled in (gsed, otools) so this is not a buildbot, but grep should do the trick.

Can anyone please point to the actual grep call that causes this?
I would much rather simplify the grep call in SoX itself (if possible)
than depend on a specific version of grep (uggh).

	Jan