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Date:      Tue, 26 Apr 2022 19:51:09 +0000
From:      bugzilla-noreply@freebsd.org
To:        office@FreeBSD.org
Subject:   [Bug 263596] editors/libreoffice: make robust against __cxa_exception ABI changes
Message-ID:  <bug-263596-25061@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263596

            Bug ID: 263596
           Summary: editors/libreoffice: make robust against
                    __cxa_exception ABI changes
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: office@FreeBSD.org
          Reporter: tijl@FreeBSD.org
                CC: dim@FreeBSD.org, emaste@freebsd.org,
                    pkubaj@FreeBSD.org
        Depends on: 263370
             Flags: maintainer-feedback?(office@FreeBSD.org)
          Assignee: office@FreeBSD.org

Created attachment 233519
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D233519&action=
=3Dedit
patch

Patch libreoffice to replace __cxa_get_globals()->caughtExceptions,
which is a pointer to the start of a struct __cxa_exception, with
__cxa_current_primary_exception(), which is a pointer to the end.  This
allows struct __cxa_exception to be extended at the start as was
recently done in FreeBSD main and stable/13 on 64-bit architectures.

Recently on FreeBSD main and stable/13 __attribute__((__aligned__)) was
added to struct _Unwind_Exception which changes its size on 32-bit
architectures, and that of __cxa_exception as well.  Patch libreoffice
to detect this so packages built on 13.0 still work on 13.1.

Change the LIB_DEPENDS on libunwind to a BUILD_DEPENDS because we only
need unwind.h (for FreeBSD 13.0 and older where that header is hidden
in /usr/include/c++/v1).

I've build and run tested on i386 and I'll test on amd64 as well but it wou=
ld
be nice if others could test aarch64 and powerpc.  Note that this patch dep=
ends
on the one in bug 263370.


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263370
[Bug 263370] devel/libunwind: unwind.h incompatible with base unwind.h
--=20
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