[PATCH] [POWERPC] Fix bootwrapper builds with newer gcc versions

[Kumar Gala]

On May 2, 2008, at 8:53 AM, Josh Boyer wrote:

> On Fri, 2 May 2008 08:32:12 -0500
> Kumar Gala <galak at kernel.crashing.org> wrote:
>
>>
>> On May 2, 2008, at 7:13 AM, Josh Boyer wrote:
>>
>>> On Fri, 2008-05-02 at 03:11 -0500, Kumar Gala wrote:
>>>> GCC 4.4.x looks to be adding support for generating out-of-line
>>>> register
>>>> saves/restores based on:
>>>>
>>>> http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html
>>>>
>>>> This breaks the bootwrapper as we'd need to link with libgcc to get
>>>> the
>>>> implementation of the register save/restores.
>>>
>>> We don't link with libgcc anywhere in the kernel.  Is this going to
>>> have
>>> similar impacts for building the vmlinux itself?
>>
>> Not by default.  The issue only shows up with -Os.  Not sure if we  
>> can
>> build the kernel that way.
>
> We can.  See CONFIG_CC_OPTIMIZE_FOR_SIZE.  That's set in at least
> pseries_defconfig and ps3_defconfig.  It's also something I've been
> thinking about trying with 4xx.
>
> Seems we need a bit more than just the bootwrapper.

building w/this enabled and will produce a patch for the kernel if  
needed.

- k