52 lines
2.3 KiB
CMake
52 lines
2.3 KiB
CMake
# - Macro to provide an option dependent on other options.
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# This macro presents an option to the user only if a set of other
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# conditions are true. When the option is not presented a default
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# value is used, but any value set by the user is preserved for when
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# the option is presented again.
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# Example invocation:
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# CMAKE_DEPENDENT_OPTION(USE_FOO "Use Foo" ON
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# "USE_BAR;NOT USE_ZOT" OFF)
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# If USE_BAR is true and USE_ZOT is false, this provides an option called
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# USE_FOO that defaults to ON. Otherwise, it sets USE_FOO to OFF. If
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# the status of USE_BAR or USE_ZOT ever changes, any value for the
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# USE_FOO option is saved so that when the option is re-enabled it
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# retains its old value.
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#=============================================================================
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# Copyright 2006-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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macro(CMAKE_DEPENDENT_OPTION option doc default depends force)
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if(${option}_ISSET MATCHES "^${option}_ISSET$")
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set(${option}_AVAILABLE 1)
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foreach(d ${depends})
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string(REGEX REPLACE " +" ";" CMAKE_DEPENDENT_OPTION_DEP "${d}")
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if(${CMAKE_DEPENDENT_OPTION_DEP})
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else(${CMAKE_DEPENDENT_OPTION_DEP})
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set(${option}_AVAILABLE 0)
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endif(${CMAKE_DEPENDENT_OPTION_DEP})
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endforeach(d)
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if(${option}_AVAILABLE)
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option(${option} "${doc}" "${default}")
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set(${option} "${${option}}" CACHE BOOL "${doc}" FORCE)
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else(${option}_AVAILABLE)
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if(${option} MATCHES "^${option}$")
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else(${option} MATCHES "^${option}$")
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set(${option} "${${option}}" CACHE INTERNAL "${doc}")
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endif(${option} MATCHES "^${option}$")
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set(${option} ${force})
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endif(${option}_AVAILABLE)
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else(${option}_ISSET MATCHES "^${option}_ISSET$")
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set(${option} "${${option}_ISSET}")
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endif(${option}_ISSET MATCHES "^${option}_ISSET$")
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endmacro(CMAKE_DEPENDENT_OPTION)
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