mpi.cmake usable in other projects

Author: scivision

CMakeLists.txt

@@ -8,6 +8,9 @@ enable_testing()
 
 message(STATUS "CMake ${CMAKE_VERSION} Generator ${CMAKE_GENERATOR}")
 
+# this has checks that can be reused in other projects as well
+include(cmake/mpi.cmake)
+
 include(cmake/compilers.cmake)
 
 add_subdirectory(test)

cmake/compilers.cmake

@@ -1,48 +1,3 @@
-include(CheckSourceCompiles)
-
-set(MPI_DETERMINE_LIBRARY_VERSION true)
-find_package(MPI REQUIRED COMPONENTS C Fortran)
-message(STATUS "MPI Library Version: ${MPI_C_LIBRARY_VERSION_STRING}")
-
-find_file(mpi_f08_mod NAMES mpi_f08.mod
-NO_DEFAULT_PATH
-HINTS ${MPI_Fortran_INCLUDE_DIRS}
-)
-
-message(STATUS "${MPI_Fortran_LIBRARY_VERSION_STRING}")
-message(STATUS "MPI libs: ${MPI_Fortran_LIBRARIES}")
-message(STATUS "MPI include: ${MPI_Fortran_INCLUDE_DIRS}")
-message(STATUS "MPI_f08 module: ${mpi_f08_mod}")
-message(STATUS "MPI compile flags: ${MPI_Fortran_COMPILER_FLAGS}")
-message(STATUS "MPI link flags: ${MPI_Fortran_LINK_FLAGS}")
-
-if(NOT mpi_f08_mod)
-  message(WARNING "Fortran MPI ${MPI_Fortran_VERSION} doesn't have MPI-3 Fortran mpi_f08.mod, searched using ${MPI_Fortran_INCLUDE_DIRS}")
-endif()
-
-include(${CMAKE_CURRENT_LIST_DIR}/openmpi.cmake)
-
-set(CMAKE_REQUIRED_INCLUDES ${MPI_Fortran_INCLUDE_DIRS})
-set(CMAKE_REQUIRED_LIBRARIES ${MPI_Fortran_LIBRARIES})
-
-# sometimes factory FindMPI.cmake doesn't define this
-check_source_compiles(Fortran
-[=[
-program test
-use mpi_f08, only : mpi_comm_rank, mpi_real, mpi_comm_world, mpi_init, mpi_finalize
-implicit none
-call mpi_init
-call mpi_finalize
-end program
-]=]
-MPI_Fortran_HAVE_F08_MODULE
-)
-
-if(NOT MPI_Fortran_HAVE_F08_MODULE)
-  message(FATAL_ERROR "Fortran MPI-3 binding not present.")
-endif()
-
-
 if(NOT MSVC)
   add_compile_options(-Wall)
 endif()

cmake/mpi.cmake

@@ -0,0 +1,43 @@
+include(CheckSourceCompiles)
+
+set(MPI_DETERMINE_LIBRARY_VERSION true)
+find_package(MPI REQUIRED COMPONENTS C Fortran)
+message(STATUS "MPI Library Version: ${MPI_C_LIBRARY_VERSION_STRING}")
+
+find_file(mpi_f08_mod NAMES mpi_f08.mod
+NO_DEFAULT_PATH
+HINTS ${MPI_Fortran_INCLUDE_DIRS}
+)
+
+message(STATUS "${MPI_Fortran_LIBRARY_VERSION_STRING}")
+message(STATUS "MPI libs: ${MPI_Fortran_LIBRARIES}")
+message(STATUS "MPI include: ${MPI_Fortran_INCLUDE_DIRS}")
+message(STATUS "MPI_f08 module: ${mpi_f08_mod}")
+message(STATUS "MPI compile flags: ${MPI_Fortran_COMPILER_FLAGS}")
+message(STATUS "MPI link flags: ${MPI_Fortran_LINK_FLAGS}")
+
+if(NOT mpi_f08_mod)
+  message(WARNING "Fortran MPI ${MPI_Fortran_VERSION} doesn't have MPI-3 Fortran mpi_f08.mod, searched using ${MPI_Fortran_INCLUDE_DIRS}")
+endif()
+
+include(${CMAKE_CURRENT_LIST_DIR}/openmpi.cmake)
+
+set(CMAKE_REQUIRED_INCLUDES ${MPI_Fortran_INCLUDE_DIRS})
+set(CMAKE_REQUIRED_LIBRARIES ${MPI_Fortran_LIBRARIES})
+
+# sometimes factory FindMPI.cmake doesn't define this
+check_source_compiles(Fortran
+[=[
+program test
+use mpi_f08, only : mpi_comm_rank, mpi_real, mpi_comm_world, mpi_init, mpi_finalize
+implicit none
+call mpi_init
+call mpi_finalize
+end program
+]=]
+MPI_Fortran_HAVE_F08_MODULE
+)
+
+if(NOT MPI_Fortran_HAVE_F08_MODULE)
+  message(FATAL_ERROR "Fortran MPI-3 binding not present.")
+endif()