Configure should test xcb-xlib version
I do not see that gpsim uses the indicated functions and xcb-lib 1.2 was released...
W register doesn't work
Weak pull-up on RA3 of 12f1822 not working
fixed in SVN 2263
Usart does not work on 12f1822
Fix in SVN 2263
fixes for p1xf1xxx family