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84 lines
2.7 KiB
84 lines
2.7 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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Check if a Fortran function exists.
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.. command:: CHECK_FORTRAN_FUNCTION_EXISTS
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.. code-block:: cmake
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CHECK_FORTRAN_FUNCTION_EXISTS(<function> <result>)
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where
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``<function>``
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the name of the Fortran function
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``<result>``
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variable to store the result; will be created as an internal cache variable.
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.. note::
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This command does not detect functions in Fortran modules. In general it is
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recommended to use :module:`CheckSourceCompiles` instead to determine if a
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Fortran function or subroutine is available.
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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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``CMAKE_REQUIRED_LINK_OPTIONS``
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.. versionadded:: 3.14
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A :ref:`;-list <CMake Language Lists>` of options to add to the link
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command (see :command:`try_compile` for further details).
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``CMAKE_REQUIRED_LIBRARIES``
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A :ref:`;-list <CMake Language Lists>` of libraries to add to the link
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command. These can be the name of system libraries or they can be
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:ref:`Imported Targets <Imported Targets>` (see :command:`try_compile` for
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further details).
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#]=======================================================================]
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include_guard(GLOBAL)
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macro(CHECK_FORTRAN_FUNCTION_EXISTS FUNCTION VARIABLE)
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if(NOT DEFINED ${VARIABLE})
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message(CHECK_START "Looking for Fortran ${FUNCTION}")
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if(CMAKE_REQUIRED_LINK_OPTIONS)
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set(CHECK_FUNCTION_EXISTS_ADD_LINK_OPTIONS
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LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS})
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else()
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set(CHECK_FUNCTION_EXISTS_ADD_LINK_OPTIONS)
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endif()
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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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set(__CheckFunction_testFortranCompilerSource
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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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SOURCE_FROM_VAR testFortranCompiler.f __CheckFunction_testFortranCompilerSource
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${CHECK_FUNCTION_EXISTS_ADD_LINK_OPTIONS}
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${CHECK_FUNCTION_EXISTS_ADD_LIBRARIES}
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)
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unset(__CheckFunction_testFortranCompilerSource)
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if(${VARIABLE})
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set(${VARIABLE} 1 CACHE INTERNAL "Have Fortran function ${FUNCTION}")
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message(CHECK_PASS "found")
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else()
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message(CHECK_FAIL "not found")
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set(${VARIABLE} "" CACHE INTERNAL "Have Fortran function ${FUNCTION}")
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endif()
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endif()
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endmacro()
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