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59 lines
2.1 KiB
CMake
59 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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CheckOBJCCompilerFlag
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---------------------
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.. versionadded:: 3.16
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Check whether the Objective-C compiler supports a given flag.
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.. command:: check_objc_compiler_flag
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.. code-block:: cmake
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check_objc_compiler_flag(<flag> <resultVar>)
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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 ``<resultVar>``.
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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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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_objc_compiler_flag()``
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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/CheckCompilerFlag)
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macro (CHECK_OBJC_COMPILER_FLAG _FLAG _RESULT)
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cmake_check_compiler_flag(OBJC "${_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(CheckOBJCSourceCompiles)
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