This directory contains the uapi version of original kernel headers that are used to generate Bionic's "cleaned-up" user-land headers. The script bionic/libc/kernel/tools/generate_uapi_headers.sh automatically imports the headers from an android kernel repository. Running the script: generate_uapi_headers.sh --download-kernel In order to run the script, you must have properly initialized the build environment using the lunch command. The script will automatically retrieve an android kernel, generate all include files, and then copy the headers to this directory. The headers are mostly covered by the GPLv2 + exception, and thus cannot be distributed as part of the platform itself. (NOTE: The cleaned up headers do not contain copyrightable information and are distributed with Bionic) For more details, please read bionic/libc/kernel/README.TXT