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 $(uname) = Linux; then AC_MSG_CHECKING(for clock_gettime syscall) AC_LINK_IFELSE([AC_LANG_PROGRAM( [#include <unistd.h> #include <sys/syscall.h> #include <time.h>], [struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])], [ac_have_clock_syscall=1 AC_DEFINE(HAVE_CLOCK_SYSCALL, 1, "use syscall interface for clock_gettime") AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) fi if test -z "$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)