When cross compiling, it should not to use 'rpcgen' which is built for target,
it should use the one from host instead.
diff -ur rpcsvc-proto-1.3.1/configure.ac rpcsvc-proto-1.3.1/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -16,4 +16,6 @@
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 
+AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" != no])
+
 AC_OUTPUT([Makefile rpcgen/Makefile rpcsvc/Makefile])
diff -ur rpcsvc-proto-1.3.1/rpcsvc/Makefile.am rpcsvc-proto-1.3.1/rpcsvc/Makefile.am
--- a/rpcsvc/Makefile.am
+++ b/rpcsvc/Makefile.am
@@ -11,6 +11,12 @@
 	bootparam_prot.h mount.h rex.h rusers.h key_prot.h \
 	nfs_prot.h rquota.h sm_inter.h
 
+if CROSS_COMPILING
+rpcgen = rpcgen
+else
+rpcgen = $(top_builddir)/rpcgen/rpcgen
+endif
+
 %.h: %.x
-	$(top_builddir)/rpcgen/rpcgen -h -o $@ $<
+	$(rpcgen) -h -o $@ $<