Port Qt to ARC Processor

**jim_king_2000** · 5th January 2010, 08:15

Hello everyone

I'm intending to port Qt to SK8855 processor whose tool chain is ARC GCC (http://www.arc.com/software/linux/). The command is "./configure -embedded arm". I meet a build break which is something like "bad instruction: swpb". It seems that there is no swpb instruction in the instruction set of the MCU.

My question is whether it is possible to port Qt to ARC processors. What can I do if the process doesn't support swpb?

Thanks,
Jim King

**wysota** · 5th January 2010, 11:24

Originally Posted by jim_king_2000

My question is whether it is possible to port Qt to ARC processors.

It should be possible provided that the CPU has support for required set of atomic operations. Just remember porting Qt to a new architecture will not be 10 minutes of work.

What can I do if the process doesn't support swpb?

You have to emulate it with something else. "swpb" probably stands for "swap byte".

**jim_king_2000** · 6th January 2010, 01:08

Thank you very much. Wish you have a good day.

Regards,
Jim King

**axeljaeger** · 19th January 2010, 21:22

Basically, the only thing in Qt that is processor specific is the implementation of Atomic operations. See core/global/arch for examples of such implementations for various CPUs.