quanah@zimbra.com writes:

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Line 131 is "#elif TIOCNOTTY". There's no 'long' there is TIOCNOTTY is undefined, it'd just evaluate to #elif 0. So my guess is that TIOCNOTTY somewhere is defined to expand to an expression involving a (long) cast.

Apprently so.

http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg785259. html

Fixed by debian.

Which is nice, but doesn't help with older debian versions. I don't see what's wrong with changing our #elif to #elif defined like you originally suggested, though I remember there was some confused #elif discussion earlier.