libreoffice build error

[Jung-uk Kim]

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On 2013-09-18 12:39:46 -0400, David Chisnall wrote:
> On 18 Sep 2013, at 16:26, Tijl Coosemans <tijl at freebsd.org> wrote:
> 
>> On Tue, 17 Sep 2013 21:04:14 -0400 Jung-uk Kim wrote:
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>>> 
>>> On 2013-09-17 13:24:41 -0400, Jung-uk Kim wrote:
>>>> I am still working on libc++ issues but it is much more 
>>>> complicated. :-(
>>> 
>>> I fixed almost everything except for exception handling
>>> issues. Unfortunately, libc++/libcxxrt's exception handling is
>>> not 100% compatible with libstdc++'s and I couldn't find a
>>> proper fix. :-(
>>> 
>>> Basically, C++/UNO bridge for LibreOffice/OpenOffice does some
>>> clever hacks, somewhat similar to the example on this blog
>>> page:
>>> 
>>> http://zbigg.blogspot.com/2009/03/catch-on-g.html
>> 
>> The definition of struct __cxa_exception doesn't match the one
>> in /usr/include/c++/v1/cxxabi.h.  There's an extra field at the
>> start in the __LP64__ case: uintptr_t referenceCount.
> 
> This field is present in newer versions of the ABI spec and is also
> there in new versions of libsupc++.  It's required for implementing
> C++11 dependent exceptions.
> 
> It shouldn't matter for code that doesn't allocate the structure
> (and nothing outside of libsupc++ / libcxxrt should be allocating
> them), because these structures are always passed around by
> pointers to their ends (where the _Unwind_Exception structure
> lives).

Ah, I see.  Now I wrote a proper fix and it looks very promising. :-)

Thanks, guys!

Jung-uk Kim
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