Chris Johns commented on a discussion on 
bsps/powerpc/motorola_powerpc/start/bspstart.c: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1322#note_153149

 >    ShowBATS();
 >  #endif
 >  
 > +  uintptr_t nvram_base;
 > +  bool nvram_indirect;
 > +  switch (myBoard) {
 > +    case MVME_2600_2700_W_MVME761:

I am wanting to remove these macros if possible. The drivers have removed 
specific dependencies on those macros as EPICS had and that is a deliberate 
approach. EPICS uses them and these are not suppose to be used as indicators of 
functionality and are not an API. This code now clearly says on board X you use 
Y.

A switch like this means the code is always built and some BSPs are using 
runtime configuration to vary functionality based on specific hardware from a 
single binary image. This lowers the configuration control at the EPICS and 
system level as only one binary is managed.

-- 
View it on GitLab: 
https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1322#note_153149
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