This FAQ is for Open MPI v4.x and earlier.
If you are looking for documentation for Open MPI v5.x and later, please visit docs.open-mpi.org.
Table of contents:
- How do I build netloc?
- What version of hwloc does netloc require?
- What is Jansson? Why does netloc require it?
| 1. How do I build netloc? |
The following only applies to netloc v0.5 since next releases will
be included in hwloc releases.
In general, all you need to do is expand the tarball, run the provided
configure script, and then run "make all install". For example:
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| shell$ gunzip -c netloc-.tar.gz | tar xf -
shell$ cd netloc-
shell$ ./configure --prefix=/usr/local
<...lots of output...>
shell$ make all install |
Note that the configure script supports a lot of different command
line options. For example, the --prefix option in the above example
tells netloc to install under the directory /usr/local/.
Consult the README
file in the netloc tarball and the output of "configure --help" for
specific instructions regarding netloc's configure command line options.
| 2. What version of hwloc does netloc require? |
The following only applies to netloc v0.5 since next releases will
be included in hwloc releases.
netloc requires a hwloc
version of 1.4.2 or later. There are some addtional features in hwloc 1.8 and
later that netloc can take advantage of as well (e.g., topology compression).
| 3. What is Jansson? Why does netloc require it? |
Jansson is C library for managing
JSON encoded data. Internally, netloc uses Jansson to store metadata and the
network topology.
netloc requires Jansson version 2.3 or later. The --with-jansson(=DIR)
configure option allows you to specifiy the location of the Jansson
library. The (=DIR) part means that specifying the directory is optional.
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