Comment (by Erik Schnetter):

I’m not convinced they would break. I assume that many of them would switch to double precision for intermediate calculations, but they wouldn’t per se break. And if they break then it’s usually just a compile-time error that is straightforward to correct, such as e.g. calling max(x, 1.0) in C++.

In fact, I am going to propose that we should build the commonly used thorns with single precision and correct these compiler errors.

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