Editing: CheckFortranSourceCompiles.cmake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. #[=======================================================================[.rst: CheckFortranSourceCompiles -------------------------- .. versionadded:: 3.1 Check if given Fortran source compiles and links into an executable. .. command:: check_fortran_source_compiles .. code-block:: cmake check_fortran_source_compiles(<code> <resultVar> [FAIL_REGEX <regex>...] [SRC_EXT <extension>] ) Checks that the source supplied in ``<code>`` can be compiled as a Fortran source file and linked as an executable. The ``<code>`` must be a Fortran ``program``. .. code-block:: cmake check_fortran_source_compiles("program test error stop end program" HAVE_ERROR_STOP SRC_EXT .F90) This command can help avoid costly build processes when a compiler lacks support for a necessary feature, or a particular vendor library is not compatible with the Fortran compiler version being used. This generate-time check may advise the user of such before the main build process. See also the :command:`check_fortran_source_runs` command to run the compiled code. The result will be stored in the internal cache variable ``<resultVar>``, with a boolean true value for success and boolean false for failure. If ``FAIL_REGEX`` is provided, then failure is determined by checking if anything in the output matches any of the specified regular expressions. By default, the test source file will be given a ``.F`` file extension. The ``SRC_EXT`` option can be used to override this with ``.<extension>`` instead-- ``.F90`` is a typical choice. The underlying check is performed by the :command:`try_compile` command. The compile and link commands can be influenced by setting any of the following variables prior to calling ``check_fortran_source_compiles()``: ``CMAKE_REQUIRED_FLAGS`` Additional flags to pass to the compiler. Note that the contents of :variable:`CMAKE_Fortran_FLAGS <CMAKE_<LANG>_FLAGS>` and its associated configuration-specific variable are automatically added to the compiler command before the contents of ``CMAKE_REQUIRED_FLAGS``. ``CMAKE_REQUIRED_DEFINITIONS`` A :ref:`;-list <CMake Language Lists>` of compiler definitions of the form ``-DFOO`` or ``-DFOO=bar``. A definition for the name specified by ``<resultVar>`` will also be added automatically. ``CMAKE_REQUIRED_INCLUDES`` A :ref:`;-list <CMake Language Lists>` of header search paths to pass to the compiler. These will be the only header search paths used by ``try_compile()``, i.e. the contents of the :prop_dir:`INCLUDE_DIRECTORIES` directory property will be ignored. ``CMAKE_REQUIRED_LINK_OPTIONS`` .. versionadded:: 3.14 A :ref:`;-list <CMake Language Lists>` of options to add to the link command (see :command:`try_compile` for further details). ``CMAKE_REQUIRED_LIBRARIES`` A :ref:`;-list <CMake Language Lists>` of libraries to add to the link command. These can be the name of system libraries or they can be :ref:`Imported Targets <Imported Targets>` (see :command:`try_compile` for further details). ``CMAKE_REQUIRED_QUIET`` If this variable evaluates to a boolean true value, all status messages associated with the check will be suppressed. The check is only performed once, with the result cached in the variable named by ``<resultVar>``. Every subsequent CMake run will re-use this cached value rather than performing the check again, even if the ``<code>`` changes. In order to force the check to be re-evaluated, the variable named by ``<resultVar>`` must be manually removed from the cache. #]=======================================================================] include_guard(GLOBAL) include(Internal/CheckSourceCompiles) macro(CHECK_Fortran_SOURCE_COMPILES SOURCE VAR) # Pass the SRC_EXT we used by default historically. # A user-provided SRC_EXT argument in ARGN will override ours. cmake_check_source_compiles(Fortran "${SOURCE}" ${VAR} SRC_EXT "F" ${ARGN}) endmacro()

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