initial sandbox version

modules/UseMPI.cmake

@@ -0,0 +1,12 @@
+option(ENABLE_MPI "Enable MPI parallelization" OFF)
+
+# on Cray configure with -D MPI_FOUND=1
+if(ENABLE_MPI AND NOT MPI_FOUND)
+    find_package(MPI)
+    if(MPI_FOUND)
+        set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${MPI_COMPILE_FLAGS}")
+        include_directories(${MPI_INCLUDE_PATH})
+    else()
+        message(FATAL_ERROR "-- You asked for MPI, but CMake could not find any MPI installation, check $PATH")
+    endif()
+endif()