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55 lines
2.0 KiB
55 lines
2.0 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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CheckCXXSourceRuns
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------------------
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Check if given C++ source compiles and links into an executable and can
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subsequently be run.
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.. command:: check_cxx_source_runs
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.. code-block:: cmake
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check_cxx_source_runs(<code> <resultVar>)
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Check that the source supplied in ``<code>`` can be compiled as a C++ source
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file, linked as an executable and then run. The ``<code>`` must contain at
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least a ``main()`` function. 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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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 reuse 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_cxx_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_CXX_SOURCE_RUNS SOURCE VAR)
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set(_CheckSourceRuns_old_signature 1)
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cmake_check_source_runs(CXX "${SOURCE}" ${VAR} ${ARGN})
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unset(_CheckSourceRuns_old_signature)
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endmacro()
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