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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 if(CMAKE_VERSION VERSION_LESS 3.12)
49 foreach(_FLAG ${MPI_COMPILE_FLAGS})
50 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${_FLAG}")
53 list(JOIN MPI_COMPILE_FLAGS " " CMAKE_REQUIRED_FLAGS)
55 set(CMAKE_REQUIRED_INCLUDES ${MPI_INCLUDE_PATH})
56 set(CMAKE_REQUIRED_LIBRARIES ${MPI_LIBRARIES})
57 check_cxx_source_compiles(
61 MPI_Allreduce(MPI_IN_PLACE, buf, 10, MPI_FLOAT, MPI_SUM, MPI_COMM_WORLD);
62 }" MPI_IN_PLACE_COMPILE_OK)
64 if(MPI_IN_PLACE_COMPILE_OK)
65 MESSAGE(STATUS "Checking for MPI_IN_PLACE - yes")
67 MESSAGE(STATUS "Checking for MPI_IN_PLACE - no")
69 set(MPI_IN_PLACE_COMPILE_OK "${MPI_IN_PLACE_COMPILE_OK}" CACHE INTERNAL "Result of mpi_in_place check")
70 set(CMAKE_REQUIRED_FLAGS)
71 set(CMAKE_REQUIRED_INCLUDES)
72 set(CMAKE_REQUIRED_LIBRARIES)
74 if (MPI_IN_PLACE_COMPILE_OK)
75 set(${VARIABLE} ${MPI_IN_PLACE_COMPILE_OK}
76 "Result of test for MPI_IN_PLACE")
78 ENDMACRO(GMX_TEST_MPI_IN_PLACE VARIABLE)