[help-texinfo] command index and unified index

[Graham Percival]

Greetings,

I'd like to print two indices; one which only lists commands (@findex), 
and another that lists everything (@cindex and @findex).  However, it 
appears that the "fn" index can only be used once.  If I place the 
"@syncodeindex fn cp" before the @printindex fn, nothing is printed for 
the command index.  When I try the code as below (@syncodeindex after 
the first @printindex), the command index works, but the unified index 
is missing the @findex entries.

Is this a known issue, or is there another command which allows an 
index to be used twice?  (first time for printing, second time for 
merging into cp)   I'm using makeinfo 4.8.



@node LilyPond commands
@appendix LilyPond commands

@printindex fn

@node LilyPond index
@appendix LilyPond index

@c  This produces the unified index
@syncodeindex fn cp
@syncodeindex vr cp

@printindex cp


Cheers,
- Graham Percival, LilyPond Documentation Editor