Makefile.m4: Fix rules to be parallel-make safe.
authorMark Wooding <mdw@distorted.org.uk>
Sat, 5 Sep 2020 22:05:37 +0000 (23:05 +0100)
committerMark Wooding <mdw@distorted.org.uk>
Sat, 5 Sep 2020 22:05:37 +0000 (23:05 +0100)
commitfdc9e9840a7f13f5c3d8f54b25c6343dde5bb6b6
treebed37cd359387a1ecdd2900e77f76a89a504569a
parente6bae8a8ee75f556b85adc7be47309fc813fd910
Makefile.m4: Fix rules to be parallel-make safe.

But unfortunately not portable beyond GNU Make.
Makefile.m4