Gecode / gecode

Generic Constraint Development Environment
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cmake: Update to require C++17. #180

Closed waywardmonkeys closed 10 months ago

waywardmonkeys commented 11 months ago

In 19b9ec3b938f52f5ef5feef15c6be417b5b27e36, Guido Tack updated the configure-based build to use C++17 rather than C++11.

We do the same here now for cmake.

This requires cmake 3.8 or later as it was 3.8 that added support for C++17.