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54 lines
2.1 KiB
CMake
54 lines
2.1 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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CheckCXXSourceCompiles
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----------------------
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Check if given C++ source compiles and links into an executable.
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.. command:: check_cxx_source_compiles
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.. code-block:: cmake
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check_cxx_source_compiles(<code> <resultVar>
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[FAIL_REGEX <regex1> [<regex2>...]])
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Check that the source supplied in ``<code>`` can be compiled as a C++ source
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file and linked as an executable (so it must contain at least a ``main()``
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function). The result will be stored in the internal cache variable specified
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by ``<resultVar>``, with a boolean true value for success and boolean false
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for failure. If ``FAIL_REGEX`` is provided, then failure is determined by
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checking if anything in the output matches any of the specified regular
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expressions.
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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_cxx_source_compiles()``:
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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/CheckSourceCompiles)
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macro(CHECK_CXX_SOURCE_COMPILES SOURCE VAR)
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cmake_check_source_compiles(CXX "${SOURCE}" ${VAR} ${ARGN})
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endmacro()
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