https://bugs.gentoo.org/656340
--- a/config/amanda/amanda_configure.m4
+++ b/config/amanda/amanda_configure.m4
@@ -257,6 +257,12 @@ AMANDA_CHECK_READLINE
 AC_CHECK_LIB(m,modf)
 AMANDA_CHECK_LIBDL
 AMANDA_GLIBC_BACKTRACE
+PKG_CHECK_MODULES([TIRPC],[libtirpc],[
+	CPPFLAGS="${CPPFLAGS} ${TIRPC_CFLAGS} -DHAVE_RPC_RPC_H"
+	LIBS="${LIBS} ${TIRPC_LIBS}"
+], [
+	AC_MSG_ERROR([libtirpc requested but library not found])
+])
 AC_SEARCH_LIBS([shm_open], [rt], [], [
   AC_MSG_ERROR([unable to find the shm_open() function])
 ])