From: Michael Orlitzky <michael@orlitzky.com>
Date: Fri, 1 May 2020 19:32:02 +0000 (-0400)
Subject: GNUmakefile: simplify recursive logic and eliminate a "pdflatex" call.
X-Git-Url: http://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=26f80f0b525b70b3f33eb8d4a5a6c94da7a20c9d;hp=26f80f0b525b70b3f33eb8d4a5a6c94da7a20c9d;p=mjotex.git

GNUmakefile: simplify recursive logic and eliminate a "pdflatex" call.

In the recursive $(MAKE), the sub-$(MAKE) can succeed and then
subsequently delete its "previous" file. When that returns control to
the parent $(MAKE), the parent will try to diff the (now missing)
"previous" file against the latest one, which of course fails. This
leads to an extra build of the same, current, not-gonna-change PDF.

A slight change in the logic both simplifies things and eliminates
that extra rebuild. Thanks to Wojtek Kosior who pointed out the bug in
an email.
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