Current head compilation problem

[Chris Johns]

Sree Harsha Konduri wrote:
> ../../../../../pc386/lib/librtemsbsp.a(ckinit.o): In function
> `bsp_clock_nanoseconds_since_last_tick_i8254':
> /home/harsha/rtems/4.11/pc386/i386-rtems4.11/c/pc386/lib/libbsp/i386/pc386/../../../../../../../../rtems/c/src/lib/libbsp/i386/pc386/clock/ckinit.c:153:
> undefined reference to `Clock_driver_isrs'

The clock driver in the pc looks suspect. The clockdrv_shell.h code in 
the bsp/shared area uses CLOCK_DRIVER_ISRS_PER_TICK as a 0 or 1 to 
determine if it is enabled or disabled while this clock driver seems to 
do something different with the same label. It also has a bug where the 
data is conditional while the code expects it to be present. I do not 
understand the logic being used here. Someone who knows this driver will 
need to comment and look at a fix.

The fix I pushed to the clockdrv_shell.h's use of 
CLOCK_DRIVER_ISRS_PER_TICK is correct and RTEMS's use of defining 0 and 
1 to things via BSPOPTS then using '#ifdef' is broken. All BSPOPT 
defines need to be '#if ....'.

Chris