The CMakeLists.txt currently unprefixed variables like SECURE or OVERRIDE. This can be messy and problematic when mimalloc is added to a project via add_subdirectory. Library projects like this ideally should use prefixed variables, e.g. MIMALLOC_SECURE rather than SECURE, so that amalgamations of multiple third-party dependencies used in larger monolithic projects don't end up with name conflicts or messy configuration pages.