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

["Steven J. Magnani" <steve at digidescorp dot com>]

On Mon, 2010-11-29 at 13:10 -0500, Valdis.Kletnieks@vt.edu wrote:
> On Mon, 29 Nov 2010 17:45:15 +0800, ÃÂâÃÂâ 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.
> 

There may be arch-specific places that cannot be made to run -O0. 
See this thread from a few years ago:

http://www.spinics.net/lists/arm-kernel/msg24836.html

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