Header files with enums instead of defines?

[Greg 'groggy' Lehey]

Has anybody thought about replacing #defines with enums in header
files?  It would make debugging a whole lot easier.  Foe example, I'm
currently looking at a debug printout which contains:

  xerrno = 17, 

To find out what that means, I need to go to
/usr/src/include/sys/errno.h and look for 17.  I find:

#define	EEXIST		17		/* File exists */

If we were to change this to 

enum EEXIST = 17;	                /* File exists */

I'd then be able to see:

  xerrno = EEXIST, 

That makes debugging a whole lot easier.  About the only down side I
can see is that you can't #undef an enum.  Is this a big deal?

Greg
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