Follow-up Comment #8, bug #63347 (project make):
Looks like attached patch changes behavior in the way that makes Linux kernel
build system assume silent mode.
For following input:
$ cat Makefile
MAKE_OPTS := A=a C=c H=h
all:
$(MAKE) -C test $(MAKE_OPTS) all
$ cat test/Makefile
MAKEFLAGS += -rR
$(info MAKEFLAGS=$(MAKEFLAGS))
all:
Unpatched make 4.4:
$ make -j2
...
MAKEFLAGS= -j2 --jobserver-auth=fifo:/home/users/builder/tmp/GMfifo655627 -rR
...
Patched make 4.4:
$ make -j2
...
MAKEFLAGS=rR -j2 --jobserver-auth=fifo:/home/users/builder/tmp/GMfifo1150317
-- H=h C=c A=a
...
Differences that I could spot:
- there's "rR" instead of "-rR"
- "-rR" is at the beginning not at the end
- MAKE_OPTS are part of MAKEFLAGS -- that's what confuses kernel's build
system since it merely looks for 's' in MAKEFLAGS after stripping long
options:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Makefile?id=e5f3ec38c8496dd7f6ada8a5e8d4958ef46ddb3f#n97
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