Stephanos Ioannidis 03879b9e2b lib: cpp: Relocate C++ ABI library components to lib/cpp/abi ...

This commit relocates the "C++ ABI library" components such as
global constructor/destructor and initialiser handlers to a dedicated
directory, `lib/cpp/abi`, in order to provide a clear separation
between the C++ ABI/runtime library and the standard C++ library
components.

Note that the Zephyr C++ ABI library currently implements the GNU/GCC
C++ ABI, which is the de-facto standard ABI used by many compilers
including Clang -- it may be necessary to sub-divide the `lib/cpp/abi`
into `lib/cpp/abi/gnu` and `lib/cpp/abi/someotherabi` in the future
when adding the support for a C++ compiler that expects an ABI vastly
different from the GNU C++ ABI.

Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>

2023-01-13 17:42:55 -05:00

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