On Jul 19, 2021, at 3:59 PM, Junchao Zhang via discuss <[email protected]> wrote:

Hello,

I configured mpich/main (or 4.0a2) with ./configure CC=gcc CXX=g++ --enable-fortran=no on Mac with Apple clang version 12.0.5 (clang-1205.0.22.11). The build failed with

... CCLD hydra_pmi_proxy Undefined symbols for architecture x86_64: "_hwloc_topology_set_io_types_filter", referenced from: _HYDT_topo_hwloc_init in libhydra.a(topo_hwloc.o)

Do you have hwloc installed (e.g. via brew)? Or if so, is it new enough? Tony