Epoll on older glibc

I’ve run accross a linux server based off glibc-2.2.5 and running a
2.6(.16.60) kernel.
epoll wasn’t a part of glibc back in those days, instead there was
libepoll which pretty much works the same way.

I’ve run into some trouble making nginx aware of the availability of
epoll in this configuration
—snip autoconf.err—
checking for epoll

/tmp/ccFpeJ2A.o: In function main': autotest.c:(.text+0x22): undefined reference toepoll_create’
collect2: ld returned exit status 1

#include <sys/types.h>
#include <unistd.h>
#include <sys/epoll.h>

int main() {
int efd = 0, fd = 1, n;
struct epoll_event ee;
ee.data.ptr = NULL;
efd = epoll_create(100);
if (efd == -1) return 1;;
return 0;
, but eventually it was as simple as:
``./configure …various options… --with-ld-opt=-lepoll’’.

While I suspect that most (all ?) users with reasonably current set-ups
won’t ever need this, is there a way for configure to figure this out on
its own ?

Best Regards,
Thanos Chatziathanassiou

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