linux-kernel - Re: [PATCH/RFC] m68k: Add -ffreestanding to KBUILD

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Message-Id: <20130410.130623.1470172183056352815.davem@davemloft.net>
Date:	Wed, 10 Apr 2013 13:06:23 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	geert@...ux-m68k.org
Cc:	linux-m68k@...ts.linux-m68k.org, linux-arch@...r.kernel.org,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFC] m68k: Add -ffreestanding to KBUILD_CFLAGS

From: Geert Uytterhoeven <geert@...ux-m68k.org>
Date: Wed, 10 Apr 2013 11:24:39 +0200

> Without -ffreestanding, gcc may replace calls to standard C library
> functions by calls to other standard C library functions and/or inline
> code.  This may cause link errors if the replacement code calls a standard
> C library function that's implemented as a macro in the kernel.

I think you should instead implement the library functions that gcc might
emit during a build.
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