12 Sep 2011
Notes for hwloc component maintainers:
1. There can only be *1* hwloc version component at a time.
Specifically: if there are multiple hwlocXYZ components (i.e.,
different versions of hwloc), then they must all be .ompi_ignore'd
except for 1. This is because we currently m4_include all of the
underlying hwloc's .m4 files -- if there are multiple hwlocXYZ
components, I don't know if m4 will barf at the multiple,
conflicting AC_DEFUNs, or whether it'll just do something
completely undefined.
1a. As a consequence, if you're adding a new hwloc version component,
you'll need to .ompi_ignore all others while you're testing the new
one.
2. If someone wants to fix #1 someday, we might be able to do what we
do for libevent: OMPI_CONFIG_SUBDIR (instead of slurping in hwloc's
.m4 files).
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