| #.rst: |
| # CMakeDependentOption |
| # -------------------- |
| # |
| # 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. |
| |
| #============================================================================= |
| # Copyright 2006-2009 Kitware, Inc. |
| # |
| # Distributed under the OSI-approved BSD License (the "License"); |
| # see accompanying file Copyright.txt for details. |
| # |
| # This software is distributed WITHOUT ANY WARRANTY; without even the |
| # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| # See the License for more information. |
| #============================================================================= |
| # (To distribute this file outside of CMake, substitute the full |
| # License text for the above reference.) |
| |
| 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(${CMAKE_DEPENDENT_OPTION_DEP}) |
| else() |
| set(${option}_AVAILABLE 0) |
| endif() |
| endforeach() |
| if(${option}_AVAILABLE) |
| option(${option} "${doc}" "${default}") |
| set(${option} "${${option}}" CACHE BOOL "${doc}" FORCE) |
| else() |
| if(${option} MATCHES "^${option}$") |
| else() |
| set(${option} "${${option}}" CACHE INTERNAL "${doc}") |
| endif() |
| set(${option} ${force}) |
| endif() |
| else() |
| set(${option} "${${option}_ISSET}") |
| endif() |
| endmacro() |