These warnings can reveal errors in logic, so quiet them by checking if the features are enabled before using variables or by assigning empty strings in some cases. - Check CMAKE_THREAD_LIBS_INIT is set before use as CMake docs note that this may be left unset if it's not needed. - Remove BOOST/OPENVDB/VULKAN references when disable. - Define INC_SYS even when empty. - Remove PNG_INC from freetype (not defined anywhere).
When updating a library remember to: * Update the README.blender with the corresponding version. * Update the THIRD-PARTY-LICENSE.txt document