395c911689
This PR changes the semantic of == for spec so that: hdf5++mpi == hdf5+mpi won't hold true anymore. It also changes the constrain semantic, so that a non-propagating variant always override a propagating variant. This means: (hdf5++mpi).constrain(hdf5+mpi) -> hdf5+mpi Before we had a very weird semantic, that was supposed to be tested by unit-tests: (libelf++debug).constrain(libelf+debug+foo) -> libelf++debug++foo This semantic has been dropped, as it was never really tested due to the == bug. |
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