Add `CLOCKS_PER_SEC` and the older `CLK_TCK`. Allows the user to define a `__CLK_TCK` to override if necessary. Also add an extra column for embedded AArch64 in `time.rst`
libc Documentation ================== The libc documentation is written using the Sphinx documentation generator. It is currently tested with Sphinx 1.1.3. To build the documents into html configure libc with the following cmake options: * -DLLVM_ENABLE_SPHINX=ON * -DLIBC_INCLUDE_DOCS=ON After configuring libc with these options the make rule `docs-libc-html` should be available.