Dear Peter Chen,
In message 1250231900.7144.40.camel@nchen-desktop you wrote:
- Does jump table means the function lists which the standalone
applications uses?
The "jump table provided by U-Boot exactly for this purpose" is the list of functions exported through the "include/_exports.h" header file.
Only these functions are available from standalone programs without linking against any of the U-Boot provided libraries. If your program links and runs fine using only these functions then you are free to license your standalone application whatever you like; if you need to link against any of the U-Boot libraries then you must release your code under GPL.
- If the functions includes some u-boot header file, it belongs to
derived work or not?
Well, the file "COPYING" explicitly mentions the header files where the situations is clear:
The header files "include/image.h" and "include/asm-*/u-boot.h" define interfaces to U-Boot. Including these (unmodified) header files in another file is considered normal use of U-Boot, and does *not* fall under the heading of "derived work".
The fact that these files are explicitly mentioned *not* to make yoru code a Derived Work should make clear that all other header files do, or at least might do, so you better not include these in a standalone application you don't intend to release under GPL. If you do, you better check with your legal department, and rely on what they tell you. Note that I just wouldn't do that.
Best regards,
Wolfgang Denk