Hmmm...indeed, it looks like the default versions may be out-of-date. Here is a table showing the required rev levels:

http://www.open-mpi.org/svn/building.php


On Apr 1, 2014, at 8:26 AM, Blosch, Edwin L <edwin.l.blosch@lmco.com> wrote:

I am getting some errors building 1.8 on RHEL6.  I tried autoreconf as suggested, but it failed for the same reason.  Is there a minimum version of m4 required that is newer than that provided by RHEL6?
 
Thanks
 
aclocal.m4:16: warning: this file was generated for autoconf 2.69.
You have another version of autoconf.  It may work, but is not guaranteed to.
If you have problems, you may need to regenerate the build system entirely.
To do so, use the procedure documented by the package, typically 'autoreconf'.
configure.ac:40: error: m4_defn: undefined macro: _m4_divert_diversion
configure.ac:40: the top level
autom4te: /usr/bin/m4 failed with exit status: 1
 
[bloscel@head openmpi]$ autoreconf
configure.ac:40: error: m4_defn: undefined macro: _m4_divert_diversion
configure.ac:40: the top level
autom4te: /usr/bin/m4 failed with exit status: 1
aclocal: autom4te failed with exit status: 1
autoreconf: aclocal failed with exit status: 1
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