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37 lines
1.2 KiB
CMake
37 lines
1.2 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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DependentOption
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--------------------
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Roughly based on CMakeDependentOption:
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https://github.com/Kitware/CMake/blob/master/Modules/CMakeDependentOption.cmake
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Modified to so it produces warnings instead of hiding an option completely and
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sets a default value.
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Argument meaning and order are the same, and there's an additional (warn)
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argument which is the message printed if the end-user enabled a feature which
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isn't "possible".
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#]=======================================================================]
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macro(DEPENDENT_OPTION option doc default depends else warn)
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set(${option}_POSSIBLE 1)
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foreach(d ${depends})
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cmake_language(EVAL CODE "
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if (${d})
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else()
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set(${option}_POSSIBLE 0)
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endif()"
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)
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endforeach()
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option(${option} "${doc}" "${default}")
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if(NOT ${option}_POSSIBLE)
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if(NOT ${option} MATCHES ${else})
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message(NOTICE "${warn}; setting to '${else}'.")
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endif()
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set(${option} ${else} CACHE BOOL "${doc}" FORCE)
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endif()
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unset(${option}_POSSIBLE)
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endmacro()
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