1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
4 #[=======================================================================[.rst:
10 Check if given Fortran source compiles and links into an executable and can
13 .. command:: check_fortran_source_runs
17 check_fortran_source_runs(<code> <resultVar>
18 [SRC_EXT <extension>])
20 Check that the source supplied in ``<code>`` can be compiled as a Fortran source
21 file, linked as an executable and then run. The ``<code>`` must be a Fortran
26 check_fortran_source_runs("program test
32 This command can help avoid costly build processes when a compiler lacks support
33 for a necessary feature, or a particular vendor library is not compatible with
34 the Fortran compiler version being used. Some of these failures only occur at runtime
35 instead of linktime, and a trivial runtime example can catch the issue before the
38 If the ``<code>`` could be built and run
39 successfully, the internal cache variable specified by ``<resultVar>`` will
40 be set to 1, otherwise it will be set to an value that evaluates to boolean
41 false (e.g. an empty string or an error message).
43 By default, the test source file will be given a ``.F90`` file extension. The
44 ``SRC_EXT`` option can be used to override this with ``.<extension>`` instead.
46 The check is only performed once, with the result cached in the variable named
47 by ``<resultVar>``. Every subsequent CMake run will reuse this cached value
48 rather than performing the check again, even if the ``<code>`` changes. In
49 order to force the check to be re-evaluated, the variable named by
50 ``<resultVar>`` must be manually removed from the cache.
52 The compile and link commands can be influenced by setting any of the
53 following variables prior to calling ``check_fortran_source_runs()``:
55 .. include:: /module/CMAKE_REQUIRED_FLAGS.txt
57 .. include:: /module/CMAKE_REQUIRED_DEFINITIONS.txt
59 .. include:: /module/CMAKE_REQUIRED_INCLUDES.txt
61 .. include:: /module/CMAKE_REQUIRED_LINK_OPTIONS.txt
63 .. include:: /module/CMAKE_REQUIRED_LIBRARIES.txt
65 .. include:: /module/CMAKE_REQUIRED_QUIET.txt
67 #]=======================================================================]
70 include(Internal/CheckSourceRuns)
72 macro(CHECK_Fortran_SOURCE_RUNS SOURCE VAR)
73 # Pass the SRC_EXT we used by default historically.
74 # A user-provided SRC_EXT argument in ARGN will override ours.
75 cmake_check_source_runs(Fortran "${SOURCE}" ${VAR} SRC_EXT "F90" ${ARGN})