Brice, I'll take a look. Maybe I built lstopo or something at some point and it's hanging around... Matt -- Matt Thompson, SSAI, Ld Scientific Programmer/Analyst NASA GSFC, Global Modeling and Assimilation Office Code 610.1, 8800 Greenbelt Rd, Greenbelt, MD 20771 Phone: 301-614-6712 Fax: 301-614-6246 http://science.gsfc.nasa.gov/sed/bio/matthew.thompson From: Brice Goglin <[email protected]> Date: Tuesday, December 14, 2021 at 5:37 PM To: <[email protected]> Cc: "Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <[email protected]> Subject: [EXTERNAL] Re: [mpich-discuss] Help Building MPICH 4.0b1: undefined references to hwloc Le 14/12/2021 à 21:40, Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] via discuss a écrit : MPICH Discuss, I'm sure I've done something stupid, but I'm not sure what. I tried searching google, but my google-fu failed me. Today I decided to try and build MPICH 4.0b1 on a cluster I'm on (NCCS Discover) using GCC 11.2. My configure line was quite boring: ./configure CC=gcc CXX=g++ FC=gfortran \ FCFLAGS=-fallow-argument-mismatch \ FFLAGS=-fallow-argument-mismatch \ --prefix=/discover/swdev/gmao_SIteam/MPI/mpich/4.0b1/gcc-11.2.0 The MPICH configure step was nice enough to let me know I needed those FFLAGS and FCFLAGS. And it configured just happily.[1] When I went to the make step I eventually it errored out with: make[3]: Entering directory '/gpfsm/dswdev/gmao_SIteam/MPI/src/mpich-4.0b1/src/pm/hydra' CCLD libpm.la CCLD hydra_persist /usr/bin/ld: /discover/swdev/gmao_SIteam/MPI/src/mpich-4.0b1/src/pm/hydra/.libs/libhydra.a(topo_hwloc.o): in function `HYDT_topo_hwloc_init': /discover/swdev/gmao_SIteam/MPI/src/mpich-4.0b1/src/pm/hydra/tools/topo/hwloc/topo_hwloc.c:577: undefined reference to `hwloc_topology_set_io_types_filter' Hello I think this error usually occurs when compiling against hwloc 2.x (such as the one embedded inside MPICH) but linking against an old hwloc 1.x. Do you have such an old hwloc installed on this machine? The first line below likely says yes. I don't know why configure would mix them like this, but you should be able to avoid the error by uninstalling the old hwloc (or with a chmod 0 on its libhwloc.so during your configure). Brice checking if hwloc meets minimum version requirement... no configure: ===== configuring modules/hwloc ===== ... ### Configuring hwloc core ### checking hwloc building mode... embedded configure: hwloc builddir: /discover/swdev/gmao_SIteam/MPI/src/mpich-4.0b1/modules/hwloc configure: hwloc srcdir: /discover/swdev/gmao_SIteam/MPI/src/mpich-4.0b1/modules/hwloc ... And I can't see anything in the output that it's somehow picking up on an hwloc I might have installed somewhere else (be it Open MPI or just hwloc by hand). Maybe there are flags I need to pass? I do see reference to --with-hwloc=embedded, but it looks like configure decided to use that itself. Thanks for any help, Matt [1] Note: I'm building on an Infiniband system so maybe I need to do a build with --with-device=ch4:ucx eventually, but that's a runtime thing. I figure it can't be involved with this error...right? -- Matt Thompson, SSAI, Ld Scientific Programmer/Analyst NASA GSFC, Global Modeling and Assimilation Office Code 610.1, 8800 Greenbelt Rd, Greenbelt, MD 20771 Phone: 301-614-6712 Fax: 301-614-6246 http://science.gsfc.nasa.gov/sed/bio/matthew.thompson _______________________________________________ discuss mailing list [email protected]<mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss