Re: make(1) variable expansion inconsistency

[der Mouse <mouse%Rodents-Montreal.ORG@localhost>]

A little while ago, I wrote (of make(1)) that

> It appears that variable expansion on dependency lines allows
> command-line settings to override Makefile settings, but that
> variable expansion when doing a var:=value setting doesn't.

PR now filed: toolchain/44844.  It includes the fix I'm using.

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