linux-kernel - Re: Conflict between sparse and commit cafa0010cd51f ("Raise the minimum required gcc version to 4.6")

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Message-ID: <20180910151526.ljp3nynngprdmlkb@ltop.local>
Date:   Mon, 10 Sep 2018 17:15:27 +0200
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     Christophe LEROY <christophe.leroy@....fr>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>, joe@...ches.com,
        Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-sparse@...r.kernel.org, sparse@...isli.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: Conflict between sparse and commit cafa0010cd51f ("Raise the
 minimum required gcc version to 4.6")

On Mon, Sep 10, 2018 at 04:05:34PM +0200, Christophe LEROY wrote:
> 
> This time it works, thanks for your help.

You're welcome.

> Should we find a may to automate that in the Makefile when
> CROSS_COMPILE is defined ?

The situation here with an old gcc is really an oddity.
I was instead thinking to update sparse so that it repports a
GCC version of at least 4.6, maybe something even more recent.

But maybe, yes, kbuild could pass GCC_VERSION to sparse so
that both the compiler used and sparse will repport the same.
I'll see. The problem is not tied to cross-compilation, though,
just that sparse may be compiled with an older compiler.

-- Luc