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77 lines
2.8 KiB
CMake
77 lines
2.8 KiB
CMake
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# 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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CheckFortranSourceRuns
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----------------------
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.. versionadded:: 3.14
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Check if given Fortran source compiles and links into an executable and can
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subsequently be run.
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.. command:: check_fortran_source_runs
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.. code-block:: cmake
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check_fortran_source_runs(<code> <resultVar>
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[SRC_EXT <extension>])
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Check that the source supplied in ``<code>`` can be compiled as a Fortran source
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file, linked as an executable and then run. The ``<code>`` must be a Fortran
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``program``.
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.. code-block:: cmake
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check_fortran_source_runs("program test
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real :: x[*]
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call co_sum(x)
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end program"
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HAVE_COARRAY)
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This command can help avoid costly build processes when a compiler lacks support
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for a necessary feature, or a particular vendor library is not compatible with
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the Fortran compiler version being used. Some of these failures only occur at runtime
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instead of linktime, and a trivial runtime example can catch the issue before the
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main build process.
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If the ``<code>`` could be built and run
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successfully, the internal cache variable specified by ``<resultVar>`` will
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be set to 1, otherwise it will be set to an value that evaluates to boolean
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false (e.g. an empty string or an error message).
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By default, the test source file will be given a ``.F90`` file extension. The
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``SRC_EXT`` option can be used to override this with ``.<extension>`` instead.
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The check is only performed once, with the result cached in the variable named
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by ``<resultVar>``. Every subsequent CMake run will re-use this cached value
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rather than performing the check again, even if the ``<code>`` changes. In
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order to force the check to be re-evaluated, the variable named by
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``<resultVar>`` must be manually removed from the cache.
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The compile and link commands can be influenced by setting any of the
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following variables prior to calling ``check_fortran_source_runs()``:
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.. include:: /module/CMAKE_REQUIRED_FLAGS.txt
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.. include:: /module/CMAKE_REQUIRED_DEFINITIONS.txt
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.. include:: /module/CMAKE_REQUIRED_INCLUDES.txt
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.. include:: /module/CMAKE_REQUIRED_LINK_OPTIONS.txt
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.. include:: /module/CMAKE_REQUIRED_LIBRARIES.txt
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.. include:: /module/CMAKE_REQUIRED_QUIET.txt
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#]=======================================================================]
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include_guard(GLOBAL)
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include(Internal/CheckSourceRuns)
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macro(CHECK_Fortran_SOURCE_RUNS SOURCE VAR)
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# Pass the SRC_EXT we used by default historically.
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# A user-provided SRC_EXT argument in ARGN will override ours.
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cmake_check_source_runs(Fortran "${SOURCE}" ${VAR} SRC_EXT "F90" ${ARGN})
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endmacro()
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