I forgot to mention one more thing in the r23152 commit message:
* Copy the fix for hwloc's m4 to disable the configure flag
--enable-debug when building in embedding mode, because it can be
hijacked by the outter-level application. In this case, if you
configured OMPI with --enable-debug (or have --enable-debug in a
platform file), you'd see all of hwloc's debug output. Ick. hwloc
1.0 will include this fix.
This commit was SVN r23153.
The following SVN revision numbers were found above:
r23152 --> open-mpi/ompi@ca3362021e
* Fix disabling hwloc build (i.e., put the AM_CONDITIONALs where they
belong in the configure.m4 file)
* Update some svn:ignores
* r23142 removed some extraneous code, but forgot to remove the
variables used only by that code
This commit was SVN r23152.
The following SVN revision numbers were found above:
r23142 --> open-mpi/ompi@610fc67d12
supports a wide variety of operating systems and platforms; see the
opal/mca/paffinity/hwloc/hwloc/README file for details.
This component includes an embedded copy of hwloc, currently based on
hwloc-1.0rc6. But note that hwloc is properly SVN imported into the
/vendor branch, so it will be easy to update when 1.0 GA is released.
Note that the hwloc tree embedded in opal/mca/paffinity/hwloc/hwloc is
identical to a hwloc distribution tarball, except that much of the
documentation was rm -rf'ed (because we don't need it for the embedded
case).
Since the paffinity framework currently does not understand hardware
threads, the hwloc component compensates for this by identifying cores
by the "first" hardware thread on that core. Hopefully we'll update
paffinity someday to understand hardware threads. :-)
configure grew a --with-hwloc option, analogous to what we do for many
other external libraries that OMPI supports. However, there's a new
feature: due to the request of several distros, OMPI can be configured
to build with its internal copy of hwloc or with an external copy of
hwloc (e.g., a system-installed hwloc).
1. If --with-hwloc is not specified, Open MPI will try to use its
internal copy (but silently fail/ignore hwloc if that fails).
1. If --with-hwloc=<dir> is supplied, Open MPI looks for hwloc
support in <dir> (and --with-hwloc-libdir=<dir>, if specified).
1. If --with-hwloc=external is supplied, Open MPI will look for hwloc
in a compiler/linker default external location.
1. If --with-hwloc=internal is supplied, Open MPI will use its
internal copy of hwloc.
Some of OMPI's main configury had to be slightly re-arranged in the
bootstrapping phase to accomodate hwloc's configry needs.
This commit was SVN r23125.
