ObjFW  Diff

		AC_DEFINE(HAVE_KQUEUE, 1, [Whether we have kqueue])
		AC_SUBST(OFSTREAMOBSERVER_KQUEUE_M, "OFStreamObserver_kqueue.m")
	])
	AC_CHECK_HEADER(poll.h, [
		AC_DEFINE(HAVE_POLL_H, 1, [Whether we have poll.h])
		AC_SUBST(OFSTREAMOBSERVER_POLL_M, "OFStreamObserver_poll.m")
	])
	AC_CHECK_HEADER(sys/select.h, [
		AC_DEFINE(HAVE_SYS_SELECT_H, 1, [Whether we have sys/select.h])
		AC_SUBST(OFSTREAMOBSERVER_SELECT_M, "OFStreamObserver_select.m")
	])
	case "$host_os" in
		mingw*)
			AC_SUBST(OFSTREAMOBSERVER_SELECT_M,
				"OFStreamObserver_select.m")

		])
		;;
esac
AS_IF([test x"$have_processes" = x"yes"], [
	AC_SUBST(OFPROCESS_M, "OFProcess.m")
	AC_DEFINE(OF_HAVE_PROCESSES, 1, [Whether we have processes])
])

AC_CHECK_HEADERS(execinfo.h)

AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
	AC_CHECK_HEADER(Foundation/NSObject.h, [
		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
		AC_SUBST(BRIDGE, "bridge")

		AS_IF([test x"$enable_shared" != x"no"], [