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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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CheckSourceRuns
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-------------------
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.. versionadded:: 3.19
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Check if given source compiles and links into an executable and can
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subsequently be run.
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.. command:: check_source_runs
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.. code-block:: cmake
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check_source_runs(<lang> <code> <resultVar>
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[SRC_EXT <extension>])
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Check once that the ``<lang>`` source supplied in ``<code>`` can be built,
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linked as an executable, and then run. The ``<code>`` must contain at least
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a ``main()`` function, or in Fortran a ``program``.
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The result is stored in the internal cache variable specified by
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``<resultVar>``. Success of build and run is indicated by boolean ``true``.
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Failure to build or run is indicated by boolean ``false`` such as an empty
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string or an error message.
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By default, the test source file will be given a file extension that matches
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the requested language. The ``SRC_EXT`` option can be used to override this
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with ``.<extension>`` instead.
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The ``<code>`` must contain a valid main program. For example:
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.. code-block:: cmake
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check_source_runs(C
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"#include <stdlib.h>
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#include <stdnoreturn.h>
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noreturn void f(){ exit(0); }
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int main(void) { f(); return 1; }"
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HAVE_NORETURN)
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check_source_runs(Fortran
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"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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The compile and link commands can be influenced by setting any of the
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following variables prior to calling ``check_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_LINK_DIRECTORIES.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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function(CHECK_SOURCE_RUNS _lang _source _var)
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cmake_check_source_runs(${_lang} "${_source}" ${_var} ${ARGN})
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endfunction()
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