1 dnl this file is part of libev, do not make local modifications
2 dnl http://software.schmorp.de/pkg/libev
5 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)
7 AC_CHECK_FUNCS(inotify_init epoll_ctl kqueue port_create poll select eventfd signalfd)
9 AC_CHECK_FUNCS(clock_gettime, [], [
10 dnl on linux, try syscall wrapper first
11 if test $(uname) = Linux; then
12 AC_MSG_CHECKING(for clock_gettime syscall)
13 AC_LINK_IFELSE([AC_LANG_PROGRAM(
15 #include <sys/syscall.h>
17 [struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])],
18 [ac_have_clock_syscall=1
19 AC_DEFINE(HAVE_CLOCK_SYSCALL, 1, Define to 1 to use the syscall interface for clock_gettime)
23 if test -z "$LIBEV_M4_AVOID_LIBRT" && test -z "$ac_have_clock_syscall"; then
24 AC_CHECK_LIB(rt, clock_gettime)
25 unset ac_cv_func_clock_gettime
26 AC_CHECK_FUNCS(clock_gettime)
30 AC_CHECK_FUNCS(nanosleep, [], [
31 if test -z "$LIBEV_M4_AVOID_LIBRT"; then
32 AC_CHECK_LIB(rt, nanosleep)
33 unset ac_cv_func_nanosleep
34 AC_CHECK_FUNCS(nanosleep)
38 if test -z "$LIBEV_M4_AVOID_LIBM"; then
41 AC_SEARCH_LIBS(floor, $LIBM, [AC_DEFINE(HAVE_FLOOR, 1, Define to 1 if the floor function is available)])