My apologies. I installed libevent-devel which fixed this Now I have to install mxm.. But that is a different matter.
On Mon, 12 Apr 2021, 17:52 Jeff Squyres (jsquyres), <jsquy...@cisco.com> wrote: > It's not really a problem, per se -- it's that Open MPI needs a lib event > with thread support enabled. The lib event that configure found / tried to > use did not have thread support enabled. > > What was the command line you used to invoke configure? > > > > On Apr 11, 2021, at 1:52 PM, John Hearns via users < > users@lists.open-mpi.org> wrote: > > > > OS - CentSO 7.9 > > OpenMPI 3.1.6 > > libevent libevent-2.0.21-4.el7.x86_6 > > OFED MLNX_OFED_LINUX-5.2-2.2.0.0 > > > > When trying to configure openmpi-3.1.6 I get this error > > checking for evthread_set_lock_callbacks in -levent... no > > configure: WARNING: External libevent does not have thread support > > configure: WARNING: Open MPI requires libevent to be compiled with > > configure: WARNING: thread support enabled > > configure: error: Cannot continue > > make: *** No targets specified and no makefile found. Stop. > > > > Configure log is attached. > > > > I guess this will be a known problem ? > > > > John H > > <config.log.bz2> > > > -- > Jeff Squyres > jsquy...@cisco.com > >
