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Trying to force `--jobs` with GNU Make 4.1
Raw
README.md 
$ make -v
GNU Make 4.1
$ strings /usr/bin/make | grep MAKEOPTS

Outputs nothing. There's no MAKEOPTS.

With a Makefile like below:

$ make
' -j --jobserver-fds=3,4' must have --jobs=8

Only -j gets propagated with no digits whatsoever.

Raw
Makefile
CPUS ?= $(shell nproc)
MAKEFLAGS += --jobs=$(CPUS)
all:
@echo \'$(MAKEFLAGS)\' must have --jobs=$(CPUS)
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sanmai commented Feb 22, 2018

So GNU Make 4.2.1 rolled into Sid some days ago.

$ make
' -j8' must have --jobs=8
$ make -v
GNU Make 4.2.1

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