An archive file (e.g. static library) requires special handling. Currently build-bom can be used to extract from an archive file (via objcopy) but the result is only the bitcode for the last member of the archive. It's not clear if objcopy is only extracting this last member, or if it's extracting each member in turn and overwriting the output file each time. Regardless, build-bom should be updated to specifically support extraction from archive files.