diff options
| -rw-r--r-- | Modules/CMakeDependentOption.cmake | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Modules/CMakeDependentOption.cmake b/Modules/CMakeDependentOption.cmake new file mode 100644 index 0000000..2183191 --- /dev/null +++ b/Modules/CMakeDependentOption.cmake @@ -0,0 +1,37 @@ +# - Macro to provide an option dependent on other options. +# This macro presents an option to the user only if a set of other +# conditions are true. When the option is not presented a default +# value is used, but any value set by the user is preserved for when +# the option is presented again. +# Example invocation: +# CMAKE_DEPENDENT_OPTION(USE_FOO "Use Foo" ON +# "USE_BAR;NOT USE_ZOT" OFF) +# If USE_BAR is true and USE_ZOT is false, this provides an option called +# USE_FOO that defaults to ON. Otherwise, it sets USE_FOO to OFF. If +# the status of USE_BAR or USE_ZOT ever changes, any value for the +# USE_FOO option is saved so that when the option is re-enabled it +# retains its old value. +MACRO(CMAKE_DEPENDENT_OPTION option doc default depends force) + IF(${option}_ISSET MATCHES "^${option}_ISSET$") + SET(${option}_AVAILABLE 1) + FOREACH(d ${depends}) + STRING(REGEX REPLACE " +" ";" CMAKE_DEPENDENT_OPTION_DEP "${d}") + IF(${CMAKE_DEPENDENT_OPTION_DEP}) + ELSE(${CMAKE_DEPENDENT_OPTION_DEP}) + SET(${option}_AVAILABLE 0) + ENDIF(${CMAKE_DEPENDENT_OPTION_DEP}) + ENDFOREACH(d) + IF(${option}_AVAILABLE) + OPTION(${option} "${doc}" "${default}") + SET(${option} "${${option}}" CACHE BOOL "${doc}" FORCE) + ELSE(${option}_AVAILABLE) + IF(${option} MATCHES "^${option}$") + ELSE(${option} MATCHES "^${option}$") + SET(${option} "${${option}}" CACHE INTERNAL "${doc}") + ENDIF(${option} MATCHES "^${option}$") + SET(${option} ${force}) + ENDIF(${option}_AVAILABLE) + ELSE(${option}_ISSET MATCHES "^${option}_ISSET$") + SET(${option} "${${option}_ISSET}") + ENDIF(${option}_ISSET MATCHES "^${option}_ISSET$") +ENDMACRO(CMAKE_DEPENDENT_OPTION) |