CMAKE_VERSION ------------- The CMake version string as three non-negative integer components separated by ``.`` and possibly followed by ``-`` and other information. The first two components represent the feature level and the third component represents either a bug-fix level or development date. Release versions and release candidate versions of CMake use the format:: <major>.<minor>.<patch>[-rc<n>] where the ``<patch>`` component is less than ``20000000``. Development versions of CMake use the format:: <major>.<minor>.<date>[-<id>] where the ``<date>`` component is of format ``CCYYMMDD`` and ``<id>`` may contain arbitrary text. This represents development as of a particular date following the ``<major>.<minor>`` feature release. Individual component values are also available in variables: * :variable:`CMAKE_MAJOR_VERSION` * :variable:`CMAKE_MINOR_VERSION` * :variable:`CMAKE_PATCH_VERSION` * :variable:`CMAKE_TWEAK_VERSION` Use the :command:`if` command ``VERSION_LESS``, ``VERSION_GREATER``, ``VERSION_EQUAL``, ``VERSION_LESS_EQUAL``, or ``VERSION_GREATER_EQUAL`` operators to compare version string values against ``CMAKE_VERSION`` using a component-wise test. Version component values may be 10 or larger so do not attempt to compare version strings as floating-point numbers. .. note:: CMake versions 2.8.2 through 2.8.12 used three components for the feature level. Release versions represented the bug-fix level in a fourth component, i.e. ``<major>.<minor>.<patch>[.<tweak>][-rc<n>]``. Development versions represented the development date in the fourth component, i.e. ``<major>.<minor>.<patch>.<date>[-<id>]``. CMake versions prior to 2.8.2 used three components for the feature level and had no bug-fix component. Release versions used an even-valued second component, i.e. ``<major>.<even-minor>.<patch>[-rc<n>]``. Development versions used an odd-valued second component with the development date as the third component, i.e. ``<major>.<odd-minor>.<date>``. The ``CMAKE_VERSION`` variable is defined by CMake 2.6.3 and higher. Earlier versions defined only the individual component variables.