machine dependent #ifdef's

[willcox at ccvaxa.UUCP]

To clarify, the define "sel" (derived from Systems Engineering Labs,
the former name of Gould's Computer Systems Div.) is used to identify
hardware dependencies.  The define "selport" identifies changes that
were made to the original BSD code that were not hardware dependencies.
These are enhancements or fixes for bugs that appeared in the code
as we got it from Berkeley.

You should use "ifdef sel", not "ifdef selport", although both are
currently defined by cpp.


David A. Willcox
Gould CSD-Urbana
1101 E. University Ave.
Urbana, IL 61801
217-384-8500
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