* tests/aclocal6.test: New file. * lib/am/configure.am (am--refresh): New rule. (%MAKEFILE-IN%, %MAKEFILE%, $(top_builddir)/config.status, $(top_srcdir)/configure): Call the top-level am--refresh from subdirectories. ($(ACLOCAL_M4)): Depend upon %CONFIGURE_DEPS%. Call the top-level am--refresh when not in the top-level directory. Fix jump directories for VPATH builds. Suggested by Raja R. Harinath.