1 https://bugs.ntp.org/show_bug.cgi?id=3942
7 AC_CHECK_HEADERS([stdlib.h string.h termio.h])
8 AC_CHECK_HEADERS([termios.h timepps.h timex.h unistd.h])
9 +AC_CHECK_HEADERS([sys/syscall.h])
17 + #ifdef HAVE_SYS_SYSCALL_H
18 + # include <sys/syscall.h>
22 extern int syscall (int, ...);