Try to find BZip2
Once done this will define
BZIP2_FOUND - system has BZip2 BZIP2_INCLUDE_DIR - the BZip2 include directory BZIP2_LIBRARIES - Link these to use BZip2 BZIP2_NEED_PREFIX - this is set if the functions are prefixed with BZ2_ BZIP2_VERSION_STRING - the version of BZip2 found (since CMake 2.8.8)
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.5/module/FindBZip2.html