The GNU make manual for 4.2.1 says this: "To access the pipe you must parse the 'MAKEFLAGS' variable and look for the argument string '--jobserver-auth=R,W'"
I don't actually need to work with the job server, just to know whether a -j flag was passed, but from my reading it should be discoverable from $(MAKEFLAGS). However, the test case below shows no indication in MAKEFLAGS from a 4.2.1 version: $ make-4.2.1 -j12 --no-print Makefile:1: MAKEFLAGS=" --no-print-directory" test1.mk:1: MAKEFLAGS=" --no-print-directory" test2.mk:1: MAKEFLAGS=" --no-print-directory" It's fine in 4.4.1 but that's too new: $ make-4.4.1 -j12 --no-print Makefile:1: MAKEFLAGS=" -j12 --no-print-directory" test1.mk:1: MAKEFLAGS=" -j12 --jobserver-auth=fifo:/tmp/GMfifo30518 --no-print-directory" test2.mk:1: MAKEFLAGS=" -j12 --jobserver-auth=fifo:/tmp/GMfifo30518 --no-print-directory" I'm looking for a way, ideally usable as far back as 3.82, of determining whether -j and thus the jobserver is in use. Is there a way? Thx, David Test-case makefiles: $ head -n10 Makefile test?.mk ==> Makefile <== $(warning MAKEFLAGS="$(MAKEFLAGS)") all: test1 test2 test1 test2:;@$(MAKE) -f $@.mk ==> test1.mk <== $(warning MAKEFLAGS="$(MAKEFLAGS)") all:;@: ==> test2.mk <== $(warning MAKEFLAGS="$(MAKEFLAGS)") all:;@:
