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# (c) https://github.com/dev-cafe/autocmake/blob/master/AUTHORS.md
# licensed under BSD-3: https://github.com/dev-cafe/autocmake/blob/master/LICENSE
#.rst:
#
# Enables MPI support.
#
# Variables used::
#
# ENABLE_MPI
# MPI_FOUND
#
# Variables modified (provided the corresponding language is enabled)::
#
# CMAKE_Fortran_FLAGS
# CMAKE_C_FLAGS
# CMAKE_CXX_FLAGS
#
# autocmake.yml configuration::
#
# docopt: "--mpi Enable MPI parallelization [default: False]."
# define: "'-DENABLE_MPI={0}'.format(arguments['--mpi'])"
option(ENABLE_MPI "Enable MPI parallelization" OFF)
# on Cray configure with -D MPI_FOUND=1
if(ENABLE_MPI AND NOT MPI_FOUND)
find_package(MPI)
if(MPI_FOUND)
if(DEFINED CMAKE_Fortran_COMPILER_ID)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${MPI_COMPILE_FLAGS}")
endif()
if(DEFINED CMAKE_C_COMPILER_ID)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${MPI_COMPILE_FLAGS}")
endif()
if(DEFINED CMAKE_CXX_COMPILER_ID)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MPI_COMPILE_FLAGS}")
endif()
include_directories(${MPI_INCLUDE_PATH})
add_definitions(-DHAVE_MPI)
else()
message(FATAL_ERROR "-- You asked for MPI, but CMake could not find any MPI installation, check $PATH")
endif()
endif()
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