Brian, there used to be two hwloc.h : the one from the hwloc libraries, and the one from the OMPI MCA framework. as a side effect, we could not --with-hwloc=external, but we had to --with-hwloc=/usr, which leads to add -I/usr/include to the CPPFLAGS. so you might end up having CPPFLAGS=-I/usr/include -I/.../internal_libevent/include ... which means that if libevent is also installed in /usr, you do not use the internal libevent as you expected.
Jeff avoided this scenario by having the option to rename the framework header file (e.g. opal/mca/hwloc/hwloc.h was moved to hwloc-internal.h), so --with-hwloc=external works now, and there is no more -I/usr/include in the CPPFLAGS i am not sure we can run into this issue with libevent nor pmix since their base component do not need to #include the external pmix.h nor event.h note this is not 100% bulletproof yet if you have both hwloc and libevent in /opt/include and /opt/lib, you have to --with-hwloc=/opt and you will likely use the external libevent too Cheers, Gilles On Thu, Apr 6, 2017 at 3:59 AM, r...@open-mpi.org <r...@open-mpi.org> wrote: > It could be that a fairly recent change was made to fix that conflict. I > believe Jeff and Gilles modified the internal hwloc header name(s) to ensure > we got the right one of those. However, that didn’t get done for libevent > and/or pmix, so the conflict likely still resides there. > >> On Apr 5, 2017, at 11:56 AM, Barrett, Brian via devel > >> <devel@lists.open-mpi.org> wrote: >> >> Right; that’s what I built. I had both libevent and hwloc installed in >> /usr. I configured with —with-hwloc=external. It built against the >> external hwloc and the internal libevent. So there must be some slight >> variation on the theme I’m missing. >> >> Brian >> >>> On Apr 5, 2017, at 11:36 AM, r...@open-mpi.org wrote: >>> >>> Not quite the problem I mentioned. The problem arises if you want external >>> hwloc, but internal libevent - and both have external versions in (say) >>> /usr. If you point hwloc there, then the -I and -L flags will cause us to >>> pull in the /usr libevent versions instead of the internal ones - and havoc >>> ensues. >>> >>> >>>> On Apr 5, 2017, at 11:30 AM, Barrett, Brian via devel >>>> <devel@lists.open-mpi.org> wrote: >>>> >>>> All - >>>> >>>> On the telecon yesterday, there was discussion of external hwloc causing >>>> problems if libevent was also installed in the same location. Does anyone >>>> have details on exactly what the failure mode is? I tried what I think is >>>> the issue (./configure —with-hwloc=external with libevent installed in >>>> /usr/ as well) and everything built / works fine. I checked the library >>>> paths and include and everything looks normal, so I must have the wrong >>>> scenario. Hints? >>>> >>>> Thanks, >>>> >>>> Brian >>>> _______________________________________________ >>>> devel mailing list >>>> devel@lists.open-mpi.org >>>> https://rfd.newmexicoconsortium.org/mailman/listinfo/devel >>> >>> _______________________________________________ >>> devel mailing list >>> devel@lists.open-mpi.org >>> https://rfd.newmexicoconsortium.org/mailman/listinfo/devel >> >> _______________________________________________ >> devel mailing list >> devel@lists.open-mpi.org >> https://rfd.newmexicoconsortium.org/mailman/listinfo/devel > > _______________________________________________ > devel mailing list > devel@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/devel
