In current gcc trunk: warning: dereferencing type-punned pointer will break strict-aliasing rules

[Nathan Sidwell]

Christian Joensson wrote:
> I'd just like to ask if this is noticed:
> 
> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:324: warning: dereferencing
> type-punned pointer will break strict-aliasing rules
> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:789: warning: dereferencing
> type-punned pointer will break strict-aliasing rules
> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:1005: warning: dereferencing
> type-punned pointer will break strict-aliasing rules
> /usr/local/src/trunk/gcc/gcc/unwind-dw2-fde.c:1024: warning:
> dereferencing type-punned pointer will break strict-aliasing rules
> /usr/local/src/trunk/gcc/gcc/unwind-dw2-fde-glibc.c:393: warning:
> dereferencing type-punned pointer will break strict-aliasing rules

I had not noticed this, but looking at the first one it must have been caused by 
my patch to the type punning warning.  It also appears to be a correct warning, 
in that we are breaking aliasing.

I shall look for a solution.

nathan
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