tdf#152524 Add a __objc_fork_ok data section for Mac Intel executable

This attempts to fix a particularly difficult to debug crash due to
memory corruption when gpgme tries to fork and exec a gpg command.
For more background, see the following bug comment:

https://bugs.documentfoundation.org/show_bug.cgi?id=152524#c39

This data section is only added in Mac Intel builds as it is a
controversial approach and I have not seen any reports of this bug
on Mac Silicon yet. So limit the fix only to Mac Intel in the hope
that this controversial approach will automatically phase itself
out when Apple eventually stops releasing new versions of macOS
for Mac Intel.

Note: the Objective C runtime doesn't appear to check the value of
this data section, but set it to 1 in case that changes in the future.

Change-Id: Ifac7893589a9183e092724297aff93eb3d58ab70
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162634
Tested-by: Jenkins
Reviewed-by: Patrick Luby <plubius@libreoffice.org>

0 files changed, 0 insertions, 0 deletions