enable support of libortp >= 0.21, which has an API breakage
in libortp >= 0.21, rtp_session_set_local_addr() has one extra
argument for the RTCP port.
diff --git a/configure.ac b/configure.ac
index 8b4014a..c285dad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,15 @@
PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 0.3.0)
PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 0.3.0)
PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 0.3.10)
-PKG_CHECK_MODULES(ORTP, ortp >= 0.13.1)
+PKG_CHECK_MODULES([ORTP], [ortp >= 0.13.1],
+ [
+ PKG_CHECK_MODULES([ORTP], [ortp >= 0.21],
+ [AC_DEFINE(HAVE_ORTP_021, 1,
+ [libortp >= 0.21])],
+ [AC_DEFINE(HAVE_ORTP_021, 0,
+ [libortp < 0.21])])
+ ]
+)
AC_CHECK_HEADERS(dahdi/user.h,,AC_MSG_WARN(DAHDI input driver will not be built))