54 lines
1.2 KiB
CMake
54 lines
1.2 KiB
CMake
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# - Add an option that depends on one or more variables being true.
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#
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# option_requires(<option_name> <description> <variable_name> [<variable_name>...])
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#
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# Original Author:
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# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# http://academic.cleardefinition.com
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# Iowa State University HCI Graduate Program/VRAC
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#
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# Copyright Iowa State University 2009-2010.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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function(option_requires name desc)
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set(args ${ARGN})
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set(OFF_BY_DEFAULT false)
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list(FIND args "OFF_BY_DEFAULT" _off_found)
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if(NOT _off_found EQUAL -1)
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list(REMOVE_AT args ${_off_found})
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set(OFF_BY_DEFAULT true)
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endif()
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set(found)
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set(missing)
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foreach(var ${args})
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if(${var})
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list(APPEND found ${var})
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else()
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list(APPEND missing ${var})
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endif()
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endforeach()
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if(NOT missing)
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set(OK TRUE)
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else()
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set(OK FALSE)
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endif()
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set(default ${OK})
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if(OFF_BY_DEFAULT)
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set(default OFF)
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endif()
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option(${name} "${desc}" ${default})
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if(${name} AND (NOT OK))
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message(FATAL_ERROR
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"${name} enabled but these dependencies were not valid: ${missing}")
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endif()
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endfunction()
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