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Test the MPI C and Fortran Compilers
 - Emit helpful error messages if the C MPI compiler is missing - Try to fall back on a custom mpi module via `include 'mpif.h'` if `use mpi` causes problems. - If `include 'mpif.h'` doesn't work, then skip compiling the `opencoarrays.F90` module, since it's only needed when the compiler is not OCA. - Fixes #246. Kinda? (See discussion there)
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‎CMakeLists.txt‎

Lines changed: 122 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -137,6 +137,128 @@ if ( (NOT MPI_C_FOUND) OR (NOT MPI_Fortran_FOUND) )
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find_package( MPI REQUIRED )
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endif()
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#--------------------------------------------------------
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# Make sure a simple "hello world" C mpi program compiles
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#--------------------------------------------------------
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set(OLD_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_FLAGS ${MPI_C_COMPILE_FLAGS} ${MPI_C_LINK_FLAGS})
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set(OLD_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
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set(CMAKE_REQUIRED_INCLUDES ${MPI_C_INCLUDE_PATH})
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set(OLD_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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set(CMAKE_REQUIRED_LIBRARIES ${MPI_C_LIBRARIES})
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include (CheckCSourceCompiles)
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CHECK_C_SOURCE_COMPILES("
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#include <mpi.h>
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#include <stdio.h>
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int main(int argc, char** argv) {
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MPI_Init(NULL, NULL);
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int world_size;
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MPI_Comm_size(MPI_COMM_WORLD, &world_size);
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int world_rank;
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MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
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char processor_name[MPI_MAX_PROCESSOR_NAME];
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int name_len;
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MPI_Get_processor_name(processor_name, &name_len);
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printf('Hello world from processor %s, rank %d out of %d processors',
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processor_name, world_rank, world_size);
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MPI_Finalize();
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}"
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MPI_C_COMPILES)
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set(CMAKE_REQUIRED_FLAGS ${OLD_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_INCLUDES ${OLD_INCLUDES})
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set(CMAKE_REQUIRED_LIBRARIES ${OLD_LIBRARIES})
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unset(OLD_REQUIRED_FLAGS)
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unset(OLD_INCLUDES)
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unset(OLD_LIBRARIES)
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if (NOT MPI_C_COMPILES)
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message(FATAL_ERROR "MPI_C is missing!"
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"Try setting MPI_C_COMPILER to the appropriate C compiler wrapper script and reconfigure."
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"i.e., `cmake -DMPI_C_COMPILER=/path/to/mpicc ..` or set it by editing the cache using"
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"cmake-gui or ccmake."
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)
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endif()
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#--------------------------------------------------------------
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# Make sure a simple "hello world" Fortran mpi program compiles
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# Try using mpi.mod first then fall back on includ 'mpif.h'
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#--------------------------------------------------------------
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set(OLD_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_FLAGS "-ffree-form" ${MPI_Fortran_COMPILE_FLAGS} ${MPI_Fortran_LINK_FLAGS})
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set(OLD_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
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set(CMAKE_REQUIRED_INCLUDES ${MPI_Fortran_INCLUDE_PATH})
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set(OLD_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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set(CMAKE_REQUIRED_LIBRARIES ${MPI_Fortran_LIBRARIES})
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include (CheckCSourceCompiles)
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CHECK_Fortran_SOURCE_COMPILES("
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program mpi_hello
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use mpi
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implicit none
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integer :: ierr, mpi_world_size, mpi_world_rank, res_len
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character*(MPI_MAX_PROCESSOR_NAME) :: proc
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call mpi_init(ierr)
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call mpi_comm_size(MPI_COMM_WORLD,mpi_world_size,ierr)
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call mpi_comm_rank(MPI_COMM_WORLD,mpi_world_rank,ierr)
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call mpi_get_processor_name(proc,res_len,ierr)
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write(*,*) 'Hello from processor ', trim(proc), ' rank ', mpi_world_rank, ' out of ', mpi_world_size, '.'
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call mpi_finalize(ierr)
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end program
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"
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MPI_Fortran_MODULE_COMPILES)
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set(CMAKE_REQUIRED_FLAGS ${OLD_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_INCLUDES ${OLD_INCLUDES})
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set(CMAKE_REQUIRED_LIBRARIES ${OLD_LIBRARIES})
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unset(OLD_REQUIRED_FLAGS)
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unset(OLD_INCLUDES)
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unset(OLD_LIBRARIES)
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#--------------------------------
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# If that failed try using mpif.h
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#--------------------------------
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set(OLD_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_FLAGS "-ffree-form" ${MPI_Fortran_COMPILE_FLAGS} ${MPI_Fortran_LINK_FLAGS})
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set(OLD_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
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set(CMAKE_REQUIRED_INCLUDES ${MPI_Fortran_INCLUDE_PATH})
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set(OLD_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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set(CMAKE_REQUIRED_LIBRARIES ${MPI_Fortran_LIBRARIES})
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include (CheckCSourceCompiles)
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CHECK_Fortran_SOURCE_COMPILES("
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program mpi_hello
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implicit none
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include 'mpif.h'
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integer :: ierr, mpi_world_size, mpi_world_rank, res_len
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character*(MPI_MAX_PROCESSOR_NAME) :: proc
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call mpi_init(ierr)
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call mpi_comm_size(MPI_COMM_WORLD,mpi_world_size,ierr)
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call mpi_comm_rank(MPI_COMM_WORLD,mpi_world_rank,ierr)
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call mpi_get_processor_name(proc,res_len,ierr)
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write(*,*) 'Hello from processor ', trim(proc), ' rank ', mpi_world_rank, ' out of ', mpi_world_size, '.'
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call mpi_finalize(ierr)
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end program
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"
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MPI_Fortran_INCLUDE_COMPILES)
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set(CMAKE_REQUIRED_FLAGS ${OLD_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_INCLUDES ${OLD_INCLUDES})
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set(CMAKE_REQUIRED_LIBRARIES ${OLD_LIBRARIES})
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unset(OLD_REQUIRED_FLAGS)
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unset(OLD_INCLUDES)
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unset(OLD_LIBRARIES)
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if ( (NOT MPI_Fortran_MODULE_COMPILES) AND (NOT MPI_Fortran_INCLUDE_COMPILES) )
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message ( WARNING "It appears that the Fortran MPI compiler is not working."
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"For OpenCoarrays Aware compilers, this may be irrelavent:"
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" The src/extensions/opencoarrays.F90 module will be disabled, but it is"
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" possible that the build will succeed, despite this fishy circumstance."
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)
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endif()
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if ( NOT MPI_Fortran_MODULE_COMPILES )
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message ( WARNING "It appears that MPI was built with a different Fortran compiler."
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"It is possible that this may cause unpredictable behavior. The build will continue"
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"using `mpif.h` BUT please report any suspicious behavior to the OpenCoarrays"
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"developers."
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)
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endif()
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#----------------
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# Setup MPI flags

‎src/mpi/CMakeLists.txt‎

Lines changed: 21 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -28,7 +28,27 @@ if(CAF_EXPOSE_INIT_FINALIZE)
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add_definitions(-DEXPOSE_INIT_FINALIZE)
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endif()
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add_library(caf_mpi mpi_caf.c ../common/caf_auxiliary.c ../extensions/opencoarrays.F90)
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# Determine whether and how to include OpenCoarrays module based on if the Fortran MPI compiler:
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# - workds
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# - is compatible with the fortran compiler used to build the MPI implementation
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if (MPI_Fortran_MODULE_COMPILES)
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# likely the same compiler compiled MPI
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set(MPI_CAF_FORTRAN_FILES ../extensions/opencoarrays.F90)
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elseif(MPI_Fortran_INCLUDE_COMPILES)
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# Likely a different version or completely different Fortran compiler built MPI
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# Since the .mod file is incompatible hack together a replacement
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file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/my_mpi_mod.f90"
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"
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module mpi
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implicit none
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public
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include 'mpif.h'
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end module"
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)
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set(MPI_CAF_FORTRAN_FILES "${CMAKE_CURRENT_BINARY_DIR}/my_mpi_mod.f90" ../extensions/opencoarrays.F90 )
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endif()
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add_library(caf_mpi mpi_caf.c ../common/caf_auxiliary.c ${MPI_CAF_FORTRAN_FILES})
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target_link_libraries(caf_mpi PRIVATE ${MPI_C_LIBRARIES} ${MPI_Fortran_LIBRARIES})
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set_target_properties ( caf_mpi

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