AC_HEADER_STDC
# check for specific header (.h) files that we are interested in
-AC_CHECK_HEADERS([ctype.h dirent.h errno.h fcntl.h limits.h signal.h sys/resource.h sys/select.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h])
+AC_CHECK_HEADERS([ctype.h dirent.h errno.h fcntl.h limits.h signal.h sys/resource.h sys/select.h sys/syscall.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h])
# Enable large file support. Do this before testing the types ino_t, off_t, and
# rlim_t, because it will affect the result of that test.