Help/variable/CMAKE_PROJECT_COMPAT_VERSION.rst
.. versionadded:: 4.3
The compatibility version of the top level project.
This variable holds the compatibility version of the project as specified in
the top level CMakeLists.txt file by a :command:project command. In the
event that the top level CMakeLists.txt contains multiple :command:project
calls, the most recently called one from that top level CMakeLists.txt will
determine the value that CMAKE_PROJECT_COMPAT_VERSION contains. For
example, consider the following top level CMakeLists.txt:
.. code-block:: cmake
cmake_minimum_required(VERSION 4.3) project(First VERSION 9.0 COMPAT_VERSION 1.2.3) project(Second VERSION 9.0 COMPAT_VERSION 3.4.5) add_subdirectory(sub) project(Third VERSION 9.0 COMPAT_VERSION 6.7.8)
And sub/CMakeLists.txt with the following contents:
.. code-block:: cmake
project(SubProj VERSION 2.0 COMPAT_VERSION 1.0) message("CMAKE_PROJECT_COMPAT_VERSION = ${CMAKE_PROJECT_COMPAT_VERSION}")
The most recently seen :command:project command from the top level
CMakeLists.txt would be project(Second ...), so this will print::
CMAKE_PROJECT_COMPAT_VERSION = 3.4.5
To obtain the version from the most recent call to :command:project
in the current directory scope or above, see the
:variable:PROJECT_COMPAT_VERSION variable.