configure: link against libsctp

osmo-hnodeb calls sctp_recvmsg directly, which is provided by libsctp.
Hence, we need to depend and link on it.

Change-Id: I793d6fe8601cf9a8dd72bf6884b469204b513c11

configure.ac

@@ -44,6 +44,16 @@ m4_ifdef([AX_CHECK_COMPILE_FLAG], [], [
 dnl checks for libraries
 AC_SEARCH_LIBS([dlopen], [dl dld], [LIBRARY_DL="$LIBS";LIBS=""])
 AC_SUBST(LIBRARY_DL)
+old_LIBS=$LIBS
+AC_SEARCH_LIBS([sctp_recvmsg], [sctp], [
+	AC_DEFINE(HAVE_LIBSCTP, 1, [Define 1 to enable SCTP support])
+	AC_SUBST(HAVE_LIBSCTP, [1])
+	if test -n "$ac_lib"; then
+		AC_SUBST(LIBSCTP_LIBS, [-l$ac_lib])
+	fi
+	], [
+	AC_MSG_ERROR([sctp_recvmsg not found in searched libs])])
+LIBS=$old_LIBS
 
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.5.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.5.0)

src/osmo-hnodeb/Makefile.am

@@ -37,4 +37,5 @@ osmo_hnodeb_LDADD = \
 	$(COVERAGE_LDFLAGS) \
 	$(LIBOSMOABIS_LIBS) \
 	$(LIBOSMOSIGTRAN_LIBS) \
+	$(LIBSCTP_LIBS) \
 	$(NULL)