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40 lines
1.4 KiB
40 lines
1.4 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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CheckCXXCompilerFlag
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------------------------
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Check whether the CXX compiler supports a given flag.
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.. command:: check_cxx_compiler_flag
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.. code-block:: cmake
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check_cxx_compiler_flag(<flag> <var>)
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Check that the ``<flag>`` is accepted by the compiler without
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a diagnostic. Stores the result in an internal cache entry
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named ``<var>``.
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A positive result from this check indicates only that the compiler did not
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issue a diagnostic message when given the flag. Whether the flag has any
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effect or even a specific one is beyond the scope of this module.
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.. note::
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Since the :command:`try_compile` command forwards flags from variables
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like :variable:`CMAKE_CXX_FLAGS <CMAKE_<LANG>_FLAGS>`, unknown flags
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in such variables may cause a false negative for this check.
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#]=======================================================================]
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include_guard(GLOBAL)
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include(Internal/CheckCompilerFlag)
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macro (CHECK_CXX_COMPILER_FLAG _FLAG _RESULT)
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cmake_check_compiler_flag(CXX "${_FLAG}" ${_RESULT})
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endmacro ()
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# FIXME(#24994): The following module is included only for compatibility
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# with projects that accidentally relied on it with CMake 3.26 and below.
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include(CheckCXXSourceCompiles)
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