Optional machine prefix for programs in for -B dirs

John Ericson git@JohnEricson.me
Wed Aug 18 06:12:12 GMT 2021

OK I have polished off my code in light of previous discussion and will
submit it in follow-up emails.

As mentioned before, this patch series is on top of the
non-behavior-changing cleanup I previously submitted in

The first patch implements my original approach of always searching for
`$machine-prog`. The next two patches refine that approach by only
searching for `$machine-prog` in directories that are not already
machine-disambiguated, as discussed. I wanted to include this fuller
history to allow both approaches to be compared, but if desired I am
happy to submit a v2 patch set with a more condensed history for
whichever option is chosen.



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