[coreboot] [Patch] remove some warnings
stepan at coresystems.de
Sun Mar 21 01:04:44 CET 2010
On 3/18/10 3:47 PM, Carl-Daniel Hailfinger wrote:
> On 18.03.2010 15:05, Stefan Reinauer wrote:
>> On 3/18/10 11:35 AM, Mark Marshall wrote:
>>> This will mean that you've got wrong debug info, of course, but it is
>>> what you seem to want. The first file defines a symbol, and the second
>>> files says that a symbol is defined somewhere else. The types don't
>>> match, but the C compiler doesn't know / care about that.
>> Since the type punning issue is about wrong alignment, I think the C
>> compiler does not do the right thing in that case, we just trick it
>> around the warning.
> AFAIK (and I could be wrong) type punning is not only about alignment,
> but the C compiler is free to optimize the generated code in a way that
> may break your expectations if you're violating strict aliasing rules.
That's what I read over and over, too but I can't make much sense of
it... what does it mean? What are we not supposed to expect? What is it
about, more than alignment?
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