38 lines
1.0 KiB
Markdown
38 lines
1.0 KiB
Markdown
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# MPI
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To add MPI, like OpenMP, you'll be best off with CMake 3.9+.
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```cmake
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find_package(MPI REQUIRED)
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message(STATUS "Run: ${MPIEXEC} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS")
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target_link_libraries(MyTarget PUBLIC MPI::MPI_CXX)
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```
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However, you can imitate this on CMake 3.1+ with:
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```cmake
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find_package(MPI REQUIRED)
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# For supporting CMake < 3.9:
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if(NOT TARGET MPI::MPI_CXX)
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add_library(MPI::MPI_CXX IMPORTED INTERFACE)
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set_property(TARGET MPI::MPI_CXX
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PROPERTY INTERFACE_COMPILE_OPTIONS ${MPI_CXX_COMPILE_FLAGS})
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set_property(TARGET MPI::MPI_CXX
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PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${MPI_CXX_INCLUDE_PATH}")
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set_property(TARGET MPI::MPI_CXX
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PROPERTY INTERFACE_LINK_LIBRARIES ${MPI_CXX_LINK_FLAGS} ${MPI_CXX_LIBRARIES})
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endif()
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message(STATUS "Run: ${MPIEXEC} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS} ${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS")
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target_link_libraries(MyTarget PUBLIC MPI::MPI_CXX)
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```
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