[mpich-discuss] Help Building MPICH 4.0b1: undefined references to hwloc

Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] matthew.thompson at nasa.gov
Tue Dec 14 14:40:13 CST 2021

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 \

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'
collect2: error: ld returned 1 exit status
Makefile:1286: recipe for target 'hydra_persist' failed
make[3]: *** [hydra_persist] Error 1

Now, as far as I can tell from the configure output, I'm using the embedded hwloc:

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,

[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
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