- Octave 4.2 requires SWIG 3.0.12 (not yet released)
- Prefer command-line octave-cli to (potentially GUI) octave
- Check output of `mkoctfile -p CXX` for any flags, e.g. -std=c++11
- Use Octave CXXFLAGS when checking headers, in case -std=* is present
- Random.h: _RANDOM_H conflicts with /usr/include/c++/5/bits/random.h (!)
- SWIGOctave.h:
  - toplev.h is already included by SWIG (and deprecated in Octave 4.2)
  - datevec.length() is deprecated, use datevec.numel() instead
  - Add as_double() and as_single() methods to array views
Original: b48d0200f538e244b1a74e0039ae50a43cd879fb