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dnl this file is part of libev, do not make local modifications
dnl http://software.schmorp.de/pkg/libev
dnl libev support
AC_CHECK_HEADERS(sys/inotify.h sys/epoll.h sys/event.h port.h poll.h sys/select.h sys/eventfd.h sys/signalfd.h)
AC_CHECK_FUNCS(inotify_init epoll_ctl kqueue port_create poll select eventfd signalfd)
AC_CHECK_FUNC(clock_gettime, [], [
dnl on linux, try syscall wrapper first
if test $(uname) = Linux; then
AC_MSG_CHECKING(for clock_gettime syscall)
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[#include <syscall.h>
#include <time.h>],
[struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])],
[ac_have_clock_syscall=1
AC_DEFINE(HAVE_CLOCK_SYSCALL, 1, "use syscall interface for clock_gettime")
AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)])
fi
if test -z "$LIBEV_M4_AVOID_LIBRT" && test -z "$ac_have_clock_syscall"; then
AC_CHECK_LIB(rt, clock_gettime)
unset ac_cv_func_clock_gettime
AC_CHECK_FUNCS(clock_gettime)
fi
])
AC_CHECK_FUNC(nanosleep, [], [
if test -z "$LIBEV_M4_AVOID_LIBRT"; then
AC_CHECK_LIB(rt, nanosleep)
unset ac_cv_func_nanosleep
AC_CHECK_FUNCS(nanosleep)
fi
])
AC_CHECK_LIB(m, ceil)
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