Link shared metis lib against GKlib

[karypis]

Will that remove the need for a 3P library to need to link with both Metis and GKlib?

[catap]

@karypis nope, it doesn't, see: https://github.com/KarypisLab/ParMETIS/pull/23.

I suggest to make a cmake package to make things easy.

This patch is used to allow compiling a dynamic library. Without it, it fails as:

Undefined symbols for architecture x86_64:
  "_gk_CPUSeconds", referenced from:
      _libmetis__CoarsenGraph in coarsen.c.o
      _libmetis__Match_RM in coarsen.c.o
      _libmetis__Match_SHEM in coarsen.c.o
      _CoarsenGraphNlevels in coarsen.c.o
      _libmetis__CreateCoarseGraph in coarsen.c.o
      _libmetis__Match_2HopAny in coarsen.c.o
      _libmetis__Match_2HopAll in coarsen.c.o
      ...
  "_gk_cur_jbufs", referenced from:
      _METIS_PartGraphKway in kmetis.c.o
      _METIS_MeshToDual in mesh.c.o
      _METIS_MeshToNodal in mesh.c.o
      _METIS_PartMeshNodal in meshpart.c.o
      _METIS_PartMeshDual in meshpart.c.o
      _METIS_NodeND in ometis.c.o
      _METIS_PartGraphRecursive in pmetis.c.o
      ...
...

[catap]

@karypis any thoughts about this one? This is the only patch that is required by MacPorts :)

I'd love to have it merged and remove all patches.

[LecrisUT]

79 brings in a more modern approach