GitLab

Unfortunately C macros can have only 1 line and length of line is
limited ---> workaround to be able to compile

They are in a sad state, it's all copy&paste and chaos. This commit
only touches the surface so far.

This attempt at a new, more flexible API for ELPA should hopefully
result in less ABI/API breaking changes in the future.

The new API features a generic key/value system for options that can be
extended without changing any exported symbols or function signatures,
so that new, optional features do not influence existing usage of ELPA.

We hope this makes life easier for users of ELPA - at least in the long
run when they migrated to this newest of ABI changes :)

Example usage (explicit documentation to be done in a future commit):

   if (elpa_init(20170403) /= ELPA_OK) then
     error stop "ELPA API version not supported"
   endif

   e = elpa_create(na, nev, na_rows, na_cols, nblk, mpi_comm_world, my_prow, my_pcol, success)

   call e%set("solver", ELPA_SOLVER_2STAGE)
   call e%set("real_kernel", ELPA_2STAGE_REAL_GENERIC)

   call e%solve(a, ev, z, success)

   call e%destroy()

   call elpa_uninit()

Conflicts:
	src/elpa1_compute_complex_template.X90

Conflicts:
	src/elpa1_auxiliary.F90
	src/elpa1_tridiag_real_template.X90

gpu tests for elpa 1 added

Conflicts:
	src/elpa1.F90
	src/elpa1_tridiag_real_template.X90
	src/elpa_c_interface.F90
	test/Fortran/test_complex.F90
	test/Fortran/test_complex_single.F90
	test/Fortran/test_real.F90
	test/Fortran/test_real_single.F90
	test/Fortran/test_real_with_c.F90

This closes issue #34