cmake_host_system_information(RESULT _ramMiB QUERY TOTAL_PHYSICAL_MEMORY)

cmake_host_system_information(RESULT _cpu QUERY PROCESSOR_DESCRIPTION)

math(EXPR _ramGB "${_ramMiB} / 1000")

message(STATUS "${_ramGB} GB RAM detected on ${CMAKE_HOST_SYSTEM_NAME} with ${_cpu}")

if(_ramGB LESS 2)

message(WARNING "Minimum RAM is about 2 GB--some tests or simulations may fail due to small memory (RAM)")

endif()

if(realbits EQUAL 32)

message(VERBOSE " 32-bit real precision")

set(arith s)

else()

message(VERBOSE " 64-bit real precision")

set(realbits 64)

set(arith d)

endif()

# If MPIEXEC is not present, no need to link MPI.

if(NOT DEFINED mpi)

find_program(_mpiexec NAMES mpiexec)

if(_mpiexec)

set(mpi on)

else()

set(mpi off)

endif(_mpiexec)

endif()

option(dev "Gemini developer mode")

option(mpi "Use MPI parallelization")

option(autobuild "autobuild missing Lapack, Scalapack or Mumps" on)

option(hdf5_external "build HDF5 instead of finding")

option(lapack_external "build Lapack instead of finding")

option(scalapack_external "build ScaLapack instead of finding")

option(mumps_external "build MUMPS instead of finding")

option(glow "use NCAR GLOW airglow / aurora model" on)

option(hwm14 "use HWM14 neutral winds model")

option(msis20 "use MSIS 2.0 neutral atmosphere model")

option(hdf5 "use HDF5 file I/O" on)

option(netcdf "use NetCDF file I/O")

# MUMPS build options (only used if auto-building MUMPS)

option(metis "MUMPS: use METIS" off)

option(scotch "MUMPS: use Scotch" off)

option(openmp "MUMPS: use OpenMP" off)

option(python "PyGemini checks")

# Matlab checks take much longer than Python, and Python covers much more

option(matlab "Matlab checks")

if(dev)

set(FETCHCONTENT_SOURCE_DIR_PYGEMINI ${PROJECT_SOURCE_DIR}/../pygemini CACHE PATH "PyGemini developer path")

set(FETCHCONTENT_SOURCE_DIR_MATGEMINI ${PROJECT_SOURCE_DIR}/../mat_gemini CACHE PATH "MatGemini developer path")

else()

set(FETCHCONTENT_UPDATES_DISCONNECTED_GLOW true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_H5FORTRAN true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_HWM14 true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_LAPACK true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_MATGEMINI true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_MSIS2 true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_MUMPS true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_NC4FORTRAN true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_PYGEMINI true)

set(FETCHCONTENT_UPDATES_DISCONNECTED_SCALAPACK true)

endif()