[Groff] Macro rename - what am I doing wrong?

[Larry McVoy]

I'm trying to make some macros that will build up the SEE ALSO list in a man
page so I can do

.SH SEE ALSO
.SA foo
.SA bar
.SA blech
.SH SOMETHING_ELSE

and get

        SEE ALSO
                foo, bar, blech

        SOMETHING_ELSE

The approach I took was to try and rename the .SH macro to something else
and stick my code in there.  That flopped, what am I doing wrong?  

Is there a better way to do this?

.rn SH ORIGINAL_SH
.de1 SH
.       tm SH \\$*
.       if !'\\*[SEE_ALSO]'' \{\
.               chop SEE_ALSO
.               chop SEE_ALSO
.               tm SEE_ALSO=\\*[SEE_ALSO]
\\*[SEE_ALSO]
.               ds SEE_ALSO
.       \}
.       ORIGINAL_SH
..
.de SA
.       tm SEE_ALSO \\$1
.       as SEE_ALSO \\$1
.       as SEE_ALSO ,
..      


---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com