linux-kernel - Re: [PATCH 4/6] h8300 CONFIG

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Message-ID: <20080217060955.GB7780@linux-sh.org>
Date:	Sun, 17 Feb 2008 15:09:55 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] h8300 CONFIG_KALLSYMS fix

On Sat, Feb 16, 2008 at 11:46:47AM +0100, Sam Ravnborg wrote:
> Something like this:
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 3d72dc3..f2928c5 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -29,3 +29,8 @@ config KPROBES
> 
>  config HAVE_KPROBES
>         def_bool n
> +
> +# Architectures where binutils prefix C symbols with
> +# underscore '_' shall select this symbol.
> +config SYMBOL_C_PREFIX
> +       bool
> 
> 
> Then in the relevant architectures we should do a
> 
>  config H8300
> +	select SYMBOL_C_PREFIX	# We prefix C symbols with '_'
> 
> And we should do this for all the relevant architectures:
> blackfin, v850 springs to my mind.
> For the other archs as separate patches via the respective
> maintainers.
> 
It's really a product of the toolchain, not the architecture. For SH also
we have some toolchains that do this, and others that don't. (Usually
sh-elf insteatd of sh-linux, the -elf toolchains in general are pretty
common for the nommu targets). In general we've just not supported the
symbol prefixing toolchains, but if there's a way we can handle this
cleanly at compile time then it's certainly worth trying to support.
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