linux-kernel - Re: [hellogcc] Re: [PATCH] Built kernel without -O2 option

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Message-ID: <13700.1291054229@localhost>
Date:	Mon, 29 Nov 2010 13:10:29 -0500
From:	Valdis.Kletnieks@...edu
To:	乔崇 <qiaochong@...ngson.cn>
Cc:	hellogcc@...elists.org,
	Américo Wang <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org, gdb@...rceware.org
Subject: Re: [hellogcc] Re: [PATCH] Built kernel without -O2 option

On Mon, 29 Nov 2010 17:45:15 +0800, ä¹å´ said:

> change mycc to this will work,:)
> 
> #!/bin/sh
> gcc "$@" -O0 ||
>  gcc "$@" -O1 ||
>  gcc "$@"

That may result in issues - the problem is that there are places in the kernel
where 'gcc -O0' will *compile* cleanly, but not actually *run* correctly.


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