On Wednesday 2019-02-13 00:22, Phil Sutter wrote: > SUBDIRS = extensions src > DIST_SUBDIRS = include src extensions >-LIBS = @LIBNETFILTER_CONNTRACK_LIBS@ >+LIBS = @LIBNETFILTER_CONNTRACK_LIBS@ @LIBTIRPC_LIBS@ This should all use ${LIBNETFILTER_CONNTRACK_LIBS} ${LIBTIRPC_LIBS}. (You're writing Makefile.am, not Makefile.in, so using ${} is possible and much desired.)