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67 lines
2.1 KiB
67 lines
2.1 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#.rst:
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# CheckFortranFunctionExists
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# --------------------------
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#
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# macro which checks if the Fortran function exists
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#
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# CHECK_FORTRAN_FUNCTION_EXISTS(FUNCTION VARIABLE)
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#
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# ::
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#
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# FUNCTION - the name of the Fortran function
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# VARIABLE - variable to store the result
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# Will be created as an internal cache variable.
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#
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#
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#
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# The following variables may be set before calling this macro to modify
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# the way the check is run:
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#
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# ::
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#
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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macro(CHECK_FORTRAN_FUNCTION_EXISTS FUNCTION VARIABLE)
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if(NOT DEFINED ${VARIABLE})
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message(STATUS "Looking for Fortran ${FUNCTION}")
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if(CMAKE_REQUIRED_LIBRARIES)
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set(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES
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LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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else()
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set(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES)
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endif()
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file(WRITE
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompiler.f
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"
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program TESTFortran
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external ${FUNCTION}
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call ${FUNCTION}()
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end program TESTFortran
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"
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)
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try_compile(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompiler.f
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${CHECK_FUNCTION_EXISTS_ADD_LIBRARIES}
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OUTPUT_VARIABLE OUTPUT
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)
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# message(STATUS "${OUTPUT}")
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if(${VARIABLE})
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set(${VARIABLE} 1 CACHE INTERNAL "Have Fortran function ${FUNCTION}")
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message(STATUS "Looking for Fortran ${FUNCTION} - found")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the Fortran ${FUNCTION} exists passed with the following output:\n"
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"${OUTPUT}\n\n")
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else()
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message(STATUS "Looking for Fortran ${FUNCTION} - not found")
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set(${VARIABLE} "" CACHE INTERNAL "Have Fortran function ${FUNCTION}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the Fortran ${FUNCTION} exists failed with the following output:\n"
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"${OUTPUT}\n\n")
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endif()
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endif()
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endmacro()
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