[Bug 258429] games/openmw fix for 0.47.0 not building due to new bullet double-precision dependency

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 11 Sep 2021 11:07:00 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258429

            Bug ID: 258429
           Summary: games/openmw fix for 0.47.0 not building due to new
                    bullet double-precision dependency
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: fluffy@FreeBSD.org
          Reporter: freebsd@frost.kiwi
          Assignee: fluffy@FreeBSD.org
             Flags: maintainer-feedback?(fluffy@FreeBSD.org)

Created attachment 227831
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=227831&action=edit
git diff for building bullet and linking it statically

OpenMW moved to bullet double-precision with the Versions 0.47.0 and later.
Since bullet is being built with it's default single-precision on FreeBSD, this
would require a change to how bullet is being built. To prevent such dependency
changes, it is possible to set OPENMW_USE_SYSTEM_BULLET=OFF in cmake and openmw
will build and statically link bullet itself, saving us from having to make
changes to devel/bullet. I believe this also removes the dependency on
devel/bullet completely.

This patch adds this switch to the Makefile. Though it should only be included,
once this port actually moves to 0.47 itself, otherwise it doesn't make sense.

I am interested in 0.47 for it's new legacy shader options in the hopes it will
help track down GPU HANGS caused by Mesa's new crocus driver:
https://gitlab.freedesktop.org/mesa/mesa/-/issues/5134

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