On Tue, 2024-07-16 at 17:53 +0200, Alejandro Colomar wrote:
> And now I say: If CC is not set in the Makefile (I didn't) nor in
> the
> environment (I didn't either), set it to foo.
> >
> > $(info $(CC))
>
> I expect this should print "foo".
>
> > alx@debian:~/tmp/make$ make
> > cc
>
> But it prints the builtin value "cc". Why?
A default setting is still a setting: the CC variable is set to a
value. The ?= only sets the variable if it's not already set, at all,
so your assignment has no effect.
You could disable all the built-in variables by running "make -R" or,
if you have a sufficiently modern version of GNU Make, buy adding to
MAKEFLAGS in your makefile:
MAKEFLAGS += -R
This will disable _all_ the built-in variables... I don't know if
that's a problem.
