>  I learnt recently that Linux at least as %p in its printk() routine
>to print pointers. (%08x when sizeof(void*)=32, %016qx when
>sizeof(void*)=64).
>  I don't know how widespread this is.

HPUX and SGI support %p for correctly sized pointers.

I'm pretty sure (it's been a while) that AiX and Motorolo's old SVR4 did
also.

Paul