38 lines
1.7 KiB
CMake
38 lines
1.7 KiB
CMake
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# - 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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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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