AC_CHECK_HEADERS([arpa/inet.h netinet/in.h netinet/udplite.h sys/eventfd.h])
AC_CHECK_HEADERS([net/if.h], [], [],
[
#include <sys/types.h>
#include <sys/socket.h>
])
AC_CHECK_HEADERS([arpa/inet.h netinet/in.h netinet/udplite.h sys/eventfd.h])
AC_CHECK_HEADERS([net/if.h], [], [],
[
#include <sys/types.h>
#include <sys/socket.h>
])