paper size: landscape broken

[Marcus Macauley]

Hi,

The "landscape" option seems to be somewhat broken. On my Fedora system  
with LilyPond 2.3.18, doing:

#(set-default-paper-size "letter" 'landscape)

at the beginning, and then:

\paper {
   #(set-paper-size "letter" 'landscape) % (or even without the 'landscape)
}

as suggested in the documentation, results in the music being oriented  
correctly, but the page in xdvi or xpdf or acroread or gpdf or ggv (*.ps)  
still being orienteed as Portrait, and, I believe, A4 as well. In any  
case, replacing "letter" with "a4" also results in a portrait-oriented  
page.

Am I doing something wrong, or is this a bug? I'd love to know of a  
workaround if there is one. Adjusting the settings in \bookpaper, e.g.:

\bookpaper {
    hsize = 11\in
    vsize = 8.5\in
    linewidth = 11\in
}

doesn't seem to help; again, it formats the music correctly, but not the  
page.

Please let me know if there is a workaround or if I'm just doing the wrong  
thing; otherwise, I'll assume it's a bug which needs to be fixed.

Thanks,
Marcus Macauley