From the output you sent (directly to me / off-list), it looks like configure finished properly.
Are you running in to some kind of problem with building or running Open MPI? Remember: configure is probing / testing a zillion things on your system. Many of the tests will fail (and they're supposed to). So unless you're actually running into a problem with building, installing, or running Open MPI, I doubt this "objdump" warning is meaningful. On Jun 28, 2020, at 7:58 AM, Sahir Butt <sahir.b...@rub.de<mailto:sahir.b...@rub.de>> wrote: For me also “which objdump” finds /usr/bin/objdump, don’t know why it goes for /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump. Warnings and errors generated by running configure are: ../configure --prefix=/Users/sahirbutt/sw/opt/openmpi-4.0.3/ > stdout configure: WARNING: discovered external PMIx version is less than internal version 3.x configure: WARNING: using internal PMIx configure: WARNING: -fno-strict-aliasing has been added to CFLAGS configure: WARNING: -finline-functions has been added to CXXFLAGS configure: WARNING: -finline-functions has been added to CXXFLAGS /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump: error: 'conftest.o': Invalid/Unsupported object file format. configure: WARNING: *** Did not find corresponding C type configure: WARNING: Compiler INTEGER*16 and mismatch; MPI datatype unsupported configure: WARNING: "-fvisibility=hidden" has been added to the hwloc CFLAGS configure: WARNING: valgrind.h not found configure: WARNING: Cannot compile this component configure: WARNING: -fno-strict-aliasing has been added to CFLAGS /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump: error: 'conftest.o': Invalid/Unsupported object file format. configure: WARNING: Unknown architecture ... proceeding anyway configure: WARNING: File locks may not work with NFS. See the Installation and users manual for instructions on testing and if necessary fixing this Attached files are stdout and also config.log Thank you! Sahir -- On 27. Jun 2020, at 17:48, Jeff Squyres (jsquyres) <jsquy...@cisco.com<mailto:jsquy...@cisco.com>> wrote: On Jun 26, 2020, at 11:32 AM, Sahir Butt via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: I am trying to build openmpi-4.0.3 with gcc 11 on macOS. I ran following to configure: ../configure --prefix=/path-to/opt/openmpi-4.0.3 --with-wrapper-ldflags="-Wl,-search_paths_first” I keep getting following error: checking for objdump... objdump /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump: error: 'conftest.o': Invalid/Unsupported object file format. This might mean that you have some kind of issue with your local compiler. FWIW, on my MacOS laptop, "which objdump" finds /usr/bin/objdump, not /Applications/Xcode.app/...etc. Can you send the stdout/stderr from running configure, and the config.log file? -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com> <config.log><stdout> -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com>
