Comment (by Zach Etienne):

Roland pointed out during today’s call that the compile flag REAL_PRECISION can be set to 4, 8, or 16 bytes. It’s likely this directly sets CCTK_REAL.

Also if we would truly like a say, physics thorn, to be cross-compatible with different CCTK_REAL aliases, we’d probably also need aliases for transcendental functions so that e.g., CCTK_SIN(x) would alias to sin(x) for double , sinf(x) for float , and sinl(x) for long double.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2686/rename-cctk_real-double-when-float-is-not