Oracle MySQL distributions include the files INFO_BIN and INFO_SRC in a "docs" subdirectory of tarball packages. These files show the revision number of the source tree when the build was created, the cmake options used to create the build, etc. I'm not sure whether these are created automatically when "cmake" is executed, or if maybe they're done manually using some other part of a build process.

But they're very useful, and it would be really nice for something like this to be included with MariaDB.