Add a private (to libc, libc_r and libpthread) header file containing prototypes for the spinlock functions that will be used for thread locks. libc will have stubs declared with weak symbols. libpthread and libc_r will have functions that really do something.
Add a private (to libc, libc_r and libpthread) header file containing
prototypes for the spinlock functions that will be used for thread locks.
libc will have stubs declared with weak symbols. libpthread and libc_r
will have functions that really do something.

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