CMP0093ΒΆ
FindBoost reports Boost_VERSION in x.y.z format.
In CMake 3.14 and below the module would report the Boost version
number as specified in the preprocessor definition BOOST_VERSION in
the boost/version.hpp file. In CMake 3.15 and later it is preferred
that the reported version number matches the x.y.z format reported
by the CMake package shipped with Boost 1.70.0 and later. The macro
value is still reported in the Boost_VERSION_MACRO variable.
The OLD behavior for this policy is for FindBoost to report
Boost_VERSION as specified in the preprocessor definition
BOOST_VERSION in boost/version.hpp. The NEW behavior for this
policy is for FindBoost to report Boost_VERSION in
x.y.z format.
This policy was introduced in CMake version 3.15. Use the
cmake_policy() command to set it to OLD or NEW explicitly.
Unlike many policies, CMake version 3.15.7 does not warn
when this policy is not set and simply uses the OLD behavior.
Note
The OLD behavior of a policy is
deprecated by definition
and may be removed in a future version of CMake.