Hi, SDCC ("sdcc" RPM) source package ships with a "device/non-free" hierarchy. Its header indicate that it's generated from files with usage restriction and thus can not be distributed under the terms of GPL. The files are (mainly?) hardware descriptions -- addresses of memory locations, their symbolic names and eventually bit field definitions with symbolic names of the bits. I believe they're absolutely essential for interoperability with other (proprietary) tools. Here's an example, for a single supported device: http://sourceforge.net/p/sdcc/code/HEAD/tree/trunk/sdcc/device/non-free/l... http://sourceforge.net/p/sdcc/code/HEAD/tree/trunk/sdcc/device/non-free/i... I am not actually sure whether the notice in the header is correct, whether the definitions in question are copyrightable and would like a lawyer opinion on that. (I'm also not sure whether the court decision on Oracle v. Google case about Java API is relevant in this context.) If the code in question is in fact non-free what would be the proper way of creating free equivalents? Reading the existing code and datasheets and writing down the symbols? Would processing them automatically do? Also, maybe we ought to remove it from the source package as well in that case. Thank you! Lubo