On 30 Apr 2018, at 16:30, Einstein Toolkit <trac-noreply@einsteintoolkit.org> wrote:

#1471: Cactus should auto-detect newer versions of GCC from MacPorts
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 Reporter:  Ian Hinder   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  minor        |  Milestone:
Component:  Cactus       |    Version:  development version
Resolution:               |   Keywords:
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Comment (by Steven R. Brandt):

Ian, gcc -version showed that it was clang.