On Tue, 08 Jan 2019 18:00:18 +0100, Jay Foster wrote:
I am attempting to build the 1.1.8 release of alsa-utils and getting an error about POLLRDNORM (and others) undefined. This error comes from axfer/waiter-select.c. axfer/waiter-select.c includes "waiter.h", which includes "poll.h". This build is for a linux target.
poll.h includes sys/poll.h which includes bits/poll.h, which only defines POLLRDNORM (and others) when __USE_XOPEN is defined (which it is not).
However, linux/poll.h includes asm/poll.h which includes asm-generic/poll.h which does define POLLRDNORM (and others).
Should I change my build to define__USE_XOPEN or should I patch waiter.h to include linux/poll.h instead of just poll.h?
Which libc are you using? The POSIX man page (man poll.h) mentions POLLRDNORM defined there, at least, on my system with glibc 2.27.
thanks,
Takashi