libcxxrt: Add a stub implementation of __cxa_call_terminate

This function is called by GCC 14 if a destructor invoked during
exception unwinding throws an exception.

Reviewed by: emaste
Obtained fr

libcxxrt: Add a stub implementation of __cxa_call_terminate

This function is called by GCC 14 if a destructor invoked during
exception unwinding throws an exception.

Reviewed by: emaste
Obtained from: libcxxrt commit 391a3dcc1054e18c2f0dff4e14d6d79ac95399d7
Differential Revision: https://reviews.freebsd.org/D46004

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libcxxrt: don't export nonexistant symbols

Remove version entries that we don't build.

Add an arm specific Version.map and for other targets run the files
through sed to handle int vs long in new a

libcxxrt: don't export nonexistant symbols

Remove version entries that we don't build.

Add an arm specific Version.map and for other targets run the files
through sed to handle int vs long in new and delete.

Ideally we'd use the SYMBOL_MAPS functionality to preprocess with cpp,
but it doesn't currently handle C++ symbols so be annoyingly duplicative
for now.

Differential Revision: https://reviews.freebsd.org/D44325

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