Follow up -- If you hit this runtime error: Assertion failed in file src/mpid/ch4/netmod/ofi/ofi_init.c at line xxxx: mapped_table[i] != FI_ADDR_NOTAVAIL That is due to libfabric having trouble with ipv6 addresses and it ignores our hints on addr_format. I'll work out a patch later. -- Hui Zhou On 8/7/20, 10:24 AM, "Raffenetti, Kenneth J." <[email protected]> wrote: Just updating from git is not enough to fix it, though. Since it is a submodule update, you'll need to run git submodule update --init to pull in the latest fix. Ken On 8/6/20, 10:14 PM, "Zhou, Hui via discuss" <[email protected]> wrote: The particular link error should have been fixed since this Monday. Try make sure it is the correct source tree and clean build tree? That said, there will be additional run time issues building ch4 on mac. I’ll spend some time tomorrow and follow up if I can make progress. -- Hui Zhou Principal Software Development Specialist Mathematics and Computer Science Argonne National Laboratory From: "Gropp, William D via discuss" <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Thursday, August 6, 2020 at 5:01 PM To: "[email protected]" <[email protected]> Cc: "Gropp, William D" <[email protected]> Subject: [mpich-discuss] Unable to build on OSX Using the current as of this morning from git, hash 1d340282 , and with CC=gcc-10 (needed to work with the corresponding version of gfortran, because gcc on OSX is really clang) ../../sources/mpich/configure --with-device=ch4:ofi --prefix=/Users/gropp/installs/mpich2-dbg works but make ends with /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: lib/.libs/libmpifort.a(mpi_c_interface_nobuf.o) has no symbols CXX src/binding/cxx/initcxx.lo CXXLD lib/libmpicxx.la <http://libmpicxx.la> CC src/env/mpichversion.o CCLD src/env/mpichversion Undefined symbols for architecture x86_64: "_ofi_process_vm_writev", referenced from: import-atom in libpmpi.dylib ld: symbol(s) not found for architecture x86_64 collect2: error: ld returned 1 exit status make[2]: *** [src/env/mpichversion] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 gropp@wdg-macbook hydra % Configure and make logs attached. (Some of the instructions on the MPICH web page for submitting bug reports sent me to unreachable github web pages) William Gropp Director and Chief Scientist, NCSA Thomas M. Siebel Chair in Computer Science University of Illinois Urbana-Champaign