CMake 2.8

[quanp]

Hi Sebastian,

Using CMake 2.8.12, I had this error

CMake Error at CheMPS2/CMakeLists.txt:2 (cmake_policy):
  Policy "CMP0028" is not known to this version of CMake.

I think CMake newer than 3.0.2 must be used since this policy was introduced in CMake version 3.0 https://cmake.org/cmake/help/v3.0/policy/CMP0028.html

Best regards, Quan

[loriab]

Good point. Are you actually running 2.8.12? If so, if you comment out the policy line, can you build (or where do you error)? That policy is only doing something special if it sees :: so as to generate warnings, so potentially it can be overlooked.

[quanp]

Yes, we had some machines with 2.8.12. Commenting out the policy line gives problem finding HDF5

CMake Error at CMake/FindTargetHDF5.cmake:71 (add_library):
  Cannot find source file:

    INTERFACE

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx
Call Stack (most recent call first):
  CMakeLists.txt:123 (find_package)

[loriab]

Ok, that's serious, it's just not going to permit the creation of an interface library (added in 3.0, now that I look), and instead demand ${Package_LIBRARIES}, etc. variables. @SebWouters, would you consider bumping the requirements? 2.8.12 was released Oct 2013 and 3.0 Jun 2014.

From a practical point of view, @quanp, I know that Miniconda (download istaller and bash it; don't need root) and conda install hdf5 cmake will get workable version.

[SebWouters]

Sure. No problem to bump the CMake version to 3.something. Will do a.s.a.p.