We recently did the opposite conversion — we ported the code from a PowerPC computer running VxWorks to an Intel Linux system. I do not remember to hit many snags, how much the differences between operating systems. Obviously, any call to an OS-specific API needs to change, and we will not make extensive use of these functions.
, PowerPC Intel. PowerPC - , Intel - . C , , . , . #pragma GCC, (#pragma reverse_bitfields).