For automake PR/46:

For automake PR/46:
* automake.in (scan_aclocal_m4): Work in all directories, not only
the top-level.  Prepend $(top_srcdir) in front of each aclocal.m4
dependency.
* lib/am/configure.am (config.status, configure, $(ACLOCAL_M4)):
Define rebuild rules in each directory.
* tests/subdir8.test: Augment to exercise aclocal.m4's dependencies
from the top-level directory.
* tests/aclocal5.test: New file.  Exercise aclocal.m4's dependencies
from a subdirectory.
* tests/Makefile.am (TESTS): Add aclocal5.test.
(XFAIL_TESTS): Replace subdir8.test by aclocal5.test.