Remake Depend

[cottrell at NBS-VMS]

/*
Kim Walden writes about mkmf...
> Unfortunately, mkmf generates wrong dependencies, in most cases,
> when generated files are involved.

It would probably help to manually make the program first, so that all
needed files exist.
 
> I would hardly call standard use of yacc or lex as 'fancy' by
> any meaning of the word.

The first program a unix novice learns is probably cat or ls. The last
is most likely yacc. Also, most files get compiled from j.x to j.o,
(where j is the name and x is the language suffix) then collected with
other .o's & maybe a few libraries to form one or more executables.
Yacc & Lex go thru an extra step. Even make gets confused about this.
 
> Almost correct is not good enough when hundreds or thousands of
> dependencies are generated.  If you have to make manual corrections
> after each dependency generation, the whole point is missed.

Okay, the alternative is do it by hand. Half a job is better than none.
You can't automate EVERYTHING! Most of the dogwork (of doing it by hand) 
is probably tracing #included files. Default suffix rules & special
cases should be a small part. No program can automatically know which
libraries to include or what ld options to use by looking at the source.
I have never used mkmf, I am commenting on your comments in general.

	jim		cottrell at nbs
*/