Joseph Huber 158d7b8c23 [libc] Allow hermetic timing if the clock function is built (#71092) ...

Summary:
This patch fixes some code duplication on the GPU. The GPU build wanted
to enable timing for hermetic tests so it built some special case
handling into the test suite. Now that `clock` is supported on the
target we can simply link against the external interface. Because we
include `clock.h` for the CLOCKS_PER_SEC macro we remap the C entrypoint
to the internal one if it ends up called. This should allow hermetic
tests to run with timing if it is supported.

2023-11-02 15:03:17 -05:00

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