Comment (by Steven R. Brandt):

For the upcoming release, we need to compile with nvcc. This leads to errors in ctthorns because Kranc detects cuda and starts putting the device tag on its functions. This leads to compiler failures for ctthorns. If we didn’t have to set CXX globally to nvcc, this problem should go away.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2553/cactus-link-command-uses-cppflags-and