[Bug 282756] devel/root: Disable runtime_cxxmodules to avoid modulemap issues

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282756

            Bug ID: 282756
           Summary: devel/root: Disable runtime_cxxmodules to avoid
                    modulemap issues
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: erik@tenku.dk

Created attachment 255168
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=255168&action=edit
Port patch

In the attached diff, I have disabled the cmake flag 'runtime_cxxmodules' and 
accommodated the rest of the port files accordingly.

A recent change in LLVM/Clang modulemap handling has caused ROOT (which builds
its own patched version of LLVM/Clang for JIT C/C++ compilation, e.g. from the
ROOT terminal) in the upstream source code to hack modulemap definitions on a
case-by-case OS release-dependent basis on macOS, which also compiles ROOT with
a LLVM/Clang compiler.
Once a more robust solution has been found in the upstream code, we can revert
to enabling 'runtime_cxxmodules' in the port.
For now, my attempts at continually patching ROOT for FreeBSD 13.3+, 14.0+ and
15.0 have proven too error-prone, and a package built on 14.0, for example, and
distributed to both 14.0 and 14.1 would otherwise only work on 14.0 in the best
of cases.

I have tested building of the port on 14.1-amd64 with the default options 
enabled and with each individual port option enabled/disabled.

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