Boost 1.73 added a boring warning about deprecated use of boost bind,
which is still used by boost python.

As of Boost 1.75, this is still not fixed:
https://github.com/boostorg/python/pull/296
https://github.com/boostorg/python/pull/315

Recent CMake versions added this warning:
CMake Deprecation Warning at CMakeLists.txt:6 (CMAKE_MINIMUM_REQUIRED):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

And we are not compatible with CMake < 3.1:
ref https://github.com/jrl-umi3218/jrl-cmakemodules/issues/338

fix #200

No more useful

gabrielebndn authored Dec 19, 2019 and Justin Carpentier committed Dec 19, 2019

* Default BUILD_TESTING to OFF

* Deprecate BUILD_UNIT_TESTS and remove its usage

* Revert "Default BUILD_TESTING to OFF"

This reverts commit 102bf6fb30ce77bfe195b296482406b4b6a81b41.

* [BUILD_UNIT_TESTS] Better deprecation message