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36 # - Define macro to check if MPI_IN_PLACE exists
38 # GMX_TEST_MPI_IN_PLACE(VARIABLE)
40 # VARIABLE will be set to true if MPI_IN_PLACE exists
43 include(CheckCSourceCompiles)
44 MACRO(GMX_TEST_MPI_IN_PLACE VARIABLE)
45 if(NOT DEFINED MPI_IN_PLACE_COMPILE_OK)
46 MESSAGE(STATUS "Checking for MPI_IN_PLACE")
48 set(CMAKE_REQUIRED_FLAGS ${MPI_COMPILE_FLAGS})
49 set(CMAKE_REQUIRED_INCLUDES ${MPI_INCLUDE_PATH})
50 set(CMAKE_REQUIRED_LIBRARIES ${MPI_LIBRARIES})
51 check_cxx_source_compiles(
55 MPI_Allreduce(MPI_IN_PLACE, buf, 10, MPI_FLOAT, MPI_SUM, MPI_COMM_WORLD);
56 }" MPI_IN_PLACE_COMPILE_OK)
58 if(MPI_IN_PLACE_COMPILE_OK)
59 MESSAGE(STATUS "Checking for MPI_IN_PLACE - yes")
61 MESSAGE(STATUS "Checking for MPI_IN_PLACE - no")
63 set(MPI_IN_PLACE_COMPILE_OK "${MPI_IN_PLACE_COMPILE_OK}" CACHE INTERNAL "Result of mpi_in_place check")
64 set(CMAKE_REQUIRED_FLAGS)
65 set(CMAKE_REQUIRED_INCLUDES)
66 set(CMAKE_REQUIRED_LIBRARIES)
68 if (MPI_IN_PLACE_COMPILE_OK)
69 set(${VARIABLE} ${MPI_IN_PLACE_COMPILE_OK}
70 "Result of test for MPI_IN_PLACE")
72 ENDMACRO(GMX_TEST_MPI_IN_PLACE VARIABLE)