Comment (by Roland Haas):

The earliest g++ version (which is used for its stdc++ library by icpc) that works is g++ version 6.X (I do not remember the correct “X”). This is true even when using the newest Intel compiler since the issue is the C++ standard library and not the compiler.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2407/cactus-math-work-arounds-break-carpetx