linux-kernel - Re: [RFC 1/4] scripts: add stackusage script

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Date:	Thu, 25 Jun 2015 10:04:00 +0200
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Michal Marek <mmarek@...e.cz>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/4] scripts: add stackusage script

On Tue, Jun 23 2015, Michal Marek <mmarek@...e.cz> wrote:

>
> EXTRA_CFLAGS is reserved for use by Makefiles, please use KCFLAGS
> instead.

Will do, thanks. Maybe Documentation/SubmitChecklist and
Documentation/development-process/4.Coding wants to be updated.

> I wonder whether it worked at all, because EXTRA_CFLAGS is
> reset by scripts/Makefile.build.

It did indeed work, but only because I passed the setting on the make
command line and not via the environment. I think one needs an override
directive to actually override the settings from the command line:

$ cat Makefile 
VAR1 := a1
VAR2 := a2
override VAR3 := a3
override VAR4 := a4

all:
        @echo $(VAR1) $(VAR2) $(VAR3) $(VAR4)
$ VAR1=b1 VAR3=b3 make VAR2=b2 VAR4=b4 all
a1 b2 a3 a4
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