Re: CC ?= gcc

Alejandro Colomar <[email protected]> Tue, 16 Jul 2024 17:53:52 +0200

Newsgroups	gmane.comp.gnu.make.general
Message-ID	<iw6pvakqqenoxepndi3qhdhegvggxori5ihcafsv6bahgr75j2@lrttc2s6xyb3>

On Tue, Jul 16, 2024 at 05:34:42PM GMT, Alejandro Colomar wrote:
> [I'm not subscribed to the list; please keep me in CC]
> 
> Hi Paul,

Hi Paul,

> Am I doing anything wrong?

Sorry for not saying it explicitly.

> 
> 	alx@debian:~/tmp/make$ env | grep CC
> 	QT_ACCESSIBILITY=1
> 	alx@debian:~/tmp/make$ cat GNUmakefile 
> 	GNUMAKEFLAGS += --no-builtin-rules
> 	GNUMAKEFLAGS += --no-builtin-variables

I expect the line above to drop any builtin setting of $(CC).

(And as can be seen in the env(1) run, I didn't set it in the
environment.)

> 	GNUMAKEFLAGS += --warn-undefined-variables
> 
> 	CC ?= foo

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?

> 	make: *** No targets.  Stop.
> 	alx@debian:~/tmp/make$ make --version
> 	GNU Make 4.4.1
> 	Built for x86_64-pc-linux-gnu
> 	Copyright (C) 1988-2023 Free Software Foundation, Inc.
> 	License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
> 	This is free software: you are free to change and redistribute it.
> 	There is NO WARRANTY, to the extent permitted by law.

Cheers,
Alex

-- 
<https://www.alejandro-colomar.es/>

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