Re: CC ?= gcc

[Alejandro Colomar]

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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