CMP0093

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 3.19.0-rc3 does not warn when this policy is not set and simply uses the OLD behavior.