This Makefile.am contained references to ORTP_CFLAGS and ORTP_LIBS, which are bogons because our configure makes no pkg-config calls for ortp, whether ortp support is included or excluded - instead these pkg-config calls that produce ORTP_CFLAGS and ORTP_LIBS happen only in libosmo-abis, while all subsequent ortp users in Osmocom go through osmo_ortp shim provided by that library.
