On 10/7/2012 22:26, Tom Lane wrote:
> John Marino<draco(at)marino(dot)st> writes:
>> Are you 100% sure that offsetof is evaluated at compile time? Is this
>> not part of section 6.6 that I quoted earlier?
> My copy of C99 sayeth (in section 7.17)
> offsetof(type, member-designator)
> which expands to an integer constant expression that has
> type size_t, the value of which is the offset in bytes, to
> the structure member (designated by member-designator), from
> the beginning of its structure (designated by type).
> If your version of gcc isn't treating it as an integer constant
> expression, you either have a bug in the compiler or a bug in your
> version of<stddef.h>. And I will say once more that we have not
> encountered any other report of gcc having a problem with this code.
> regards, tom lane
The culprit was indeed an older offsetof macro. I've committed a fix to
the trunk of DragonFly:
Using the GCC builtin version of offsetof allows Postgresql 9.1.6 to
build without the recently added patches. I'm going to revert that
commit as well.
Thanks for the pointers, Tom!
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