linux-kernel - Re: [PATCH 4/5] kernel hacking: new config DEBUG

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Message-ID: <CAK8P3a0c++Ti_39WPXwwjjmRx+EUozzCVY5Y2qicyEeLop6_6w@mail.gmail.com>
Date:   Wed, 2 May 2018 16:30:21 -0400
From:   Arnd Bergmann <arnd@...db.de>
To:     changbin.du@...el.com
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply
 GCC -Og optimization

On Tue, May 1, 2018 at 9:00 AM,  <changbin.du@...el.com> wrote:
> From: Changbin Du <changbin.du@...el.com>
> +config DEBUG_EXPERIENCE
> +       bool "Optimize for better debugging experience (-Og)"
> +       default n
> +       select NO_AUTO_INLINE
> +       depends on !CC_OPTIMIZE_FOR_SIZE
> +       help

How about having this as another option alongside CC_OPTIMIZE_FOR_SIZE
and CC_OPTIMIZE_FOR_PERFORMANCE in the same choice statement?

We could also add another option for -Os (for faster compiles)  or possibly
for -O3 (if anyone cares) in there.

      Arnd