CMP0048ΒΆ
The project()
command manages VERSION variables.
CMake version 3.0 introduced the VERSION
option of the project()
command to specify a project version as well as the name. In order to keep
PROJECT_VERSION
and related variables consistent with variable
PROJECT_NAME
it is necessary to set the VERSION variables
to the empty string when no VERSION
is given to project()
.
However, this can change behavior for existing projects that set VERSION
variables themselves since project()
may now clear them.
This policy controls the behavior for compatibility with such projects.
The OLD behavior for this policy is to leave VERSION variables untouched.
The NEW behavior for this policy is to set VERSION as documented by the
project()
command.
This policy was introduced in CMake version 3.0. CMake version 3.6.3 warns when the policy is not set and uses OLD behavior. Use the cmake_policy command to set it to OLD or NEW explicitly.
Note
The OLD
behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.