$(top_srcdir)/sntp/scm-rev: FRC.scm-rev
$(AM_V_GEN)cd $(top_builddir)/sntp && $(MAKE) $(AM_MAKEFLAGS) check-scm-rev
.PHONY: FRC.scm-rev
FRC.scm-rev:
@: FRC.scm-rev is always out of date, triggering the check every make invocation.