target-defs.h / tm.h question

[Kean Johnston]

> Are the comment
> 
> /* Note that if one of these macros must be defined in an OS .h file
>    rather than the .c file, then we need to wrap the default
>    definition in a #ifndef, since files include tm.h before this one.  */
> 
> and the description in tm.texi of these macros as defined in the .c file 
> (not in tm.h) insufficiently clear about the principle?
Sarcasm unneccesary. Its a big file, I didnt read every line of
it. But thank you for the reply it answered my question.

Kean