linux-kernel - Re: [PATCH] RFC: fs to be compiled with -Dlinux

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Date:	Fri, 28 Oct 2011 06:05:36 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-kernel@...r.kernel.org, Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH] RFC: fs to be compiled with -Dlinux

On Fri, Oct 28, 2011 at 3:15 AM, Linus Walleij <linus.walleij@...aro.org> wrote:
> I dunno how to solve this problem the real way or if I'm just doing
> something idiotic. I'm using a vanilla GCC "arm-none-eabi-gcc" not
> targeted at any specific OS so the environment variable "linux" is
> not set.

You need to fix that in general.

It's not just "-Dlinux", it's "-D__linux__" too, and it's not just in fs/.

So you need to add it to some CFLAGS at your own build infrastructure,
not in fs/Makefile.

That said, we *probably* should also look at making anything that the
kernel build uses replace something like

  #ifdef linux  (or __linux__)

with

  #if defined(linux) || defined(__KERNEL__)

so that we can always rely on just the normal __KERNEL__ define rather
than depending on the compiler being properly set up for
cross-compiling for Linux.

But your patch is definitely wrong.

                      Linus
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