[Bug 262008] editors/libreoffice failed to build

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 09 Mar 2022 17:38:27 UTC

--- Comment #57 from Dimitry Andric <dim@FreeBSD.org> ---
(In reply to Piotr Kubaj from comment #53)
Upstream doesn't have the libc++abi workaround parts for powerpc and powerpc64,
so maybe it was never necessary there? Or maybe nobody ever ran into the issue
on these architectures.

The question is whether the addition of __attribute__((aligned)) to struct
_Unwind_Exception makes any difference in the size of __cxa_exception on the
platform.  On x86_64, the maximum alignment is 16 bytes, so the addition of the
attribute makes the total struct grow from 120 to 128 bytes.

Depending on how powerpc and powerpc64 struct layouts end up, adding the
attribute may or may not make a difference. If it does, then we should probably
add a similar piece of workaround code as was done for x86_64.

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