autoconf appears to be producing a malformed test for epoll_ctl

[Naveen Nathan]

Hi everyone,

During the course of configuring lighttpd source it appears that
autoconf was using a malformed test to check the existance of epoll_ctl
system call on my system.

I am running Slackware 10.2 w/ a 2.6 kernel which includes support for
epoll. I also use glibc 2.3.5 which also has support for epoll.

In the attached config.log file, you can see the epoll_ctl test
failed on lines 3435-3595. It seems that stubs are defined:
line 3580: #if defined (__stub_epoll_ctl) || defined (__stub___epoll_ctl)
which seems to break the compilation.

I'm unsure whether this is a malformed autoconf test or an issue with
my glibc. Any information would be much appreciated.

lighttpd-1.4.11-config.log
Description: Text document