Otherwise the build will complain about multiple definitions
@ -55,6 +55,7 @@ AC_ARG_ENABLE(pie, AC_HELP_STRING([--enable-pie],
])
AC_CHECK_FUNCS(explicit_bzero)
AC_CHECK_FUNCS(rawmemchr)
AC_CHECK_FUNC(signalfd, dummy=yes,
AC_MSG_ERROR(signalfd support is required))