Ok. I went back to look at your logs.
1. Errors in config.log are normal and expected. You can ignore them. The configure script is probing your system, so finding things that *don't* work is normal and expected. 2. The error you're seeing is because the Verbs network API has moved on since Open MPI v1.10. I.e., the Verbs library in RHEL 7.6 is a significantly later version that existed in Open MPI v1.10 timeframe, and it's just not compatible. Hence, the "openib" BTL plugin is failing to compile. You can avoid building the openib BTL plugin by passing --enable-no-build=btl:openib on the configure command line, but you'll lose network performance if you have an InfiniBand, iWARP, or RoCE-based network. If you're already just running over TCP, you won't notice any difference. ----- All that being said, I'd be very surprised if WRF only supports Open MPI v1.10; the v1.10 series dates back to 2015. That's ancient in terms of computer software -- it would be amazing if WRF didn't support later versions of Open MPI. On Oct 30, 2019, at 8:47 PM, Qianjin Zheng <qianjin.zh...@hotmail.com<mailto:qianjin.zh...@hotmail.com>> wrote: Hi Jeff, Thank you for your quick reply. I think my WRF-chem model needs the openmpi v1.10.1 library. Recently, my service got upgrade include openmpi v1.10.1. After that, I cannot run my model any more under the high version of openmpi. Thus, I tried to install the openmpi v1.10.1 by myself. Regards, Qianjin ________________________________ From: Jeff Squyres (jsquyres) <jsquy...@cisco.com<mailto:jsquy...@cisco.com>> Sent: Wednesday, October 30, 2019 7:40 PM To: Open MPI User's List <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> Cc: Qianjin Zheng <qianjin.zh...@hotmail.com<mailto:qianjin.zh...@hotmail.com>> Subject: Re: [OMPI users] Configure Error for installation of openmpi-1.10.1 v1.10.x is pretty ancient. Is there any chance you can update to 4.0.2? That's the latest version (and it has significantly better MPI_THREAD_MULITPLE support). On Oct 30, 2019, at 8:36 PM, Qianjin Zheng via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: I tried to install openmpi-1.10.1 but I am not able to configure and install it. Here is how I install OpenMPI ./configure --prefix=$PATH/LIBRARIES/openmpi --enable-static --enable-mpi-thread-multiple --without-usnic --enable-mpi-cxx CC=gcc CXX=g++ FC=gfortran FCFLAGS=-m64 F77=gfortran FFLAGS=-m64 make all make install My Operating system/version: 3.10.0-957.21.2.el7.x86_64 Computer hardware: NAME="Red Hat Enterprise Linux Server" VERSION="7.6 (Maipo)" ID="rhel" ID_LIKE="fedora" VARIANT="Server" VARIANT_ID="server" VERSION_ID="7.6" PRETTY_NAME="Red Hat Enterprise Linux" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:redhat:enterprise_linux:7.6:GA:server" HOME_URL="https://www.redhat.com/" BUG_REPORT_URL="https://bugzilla.redhat.com/" REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7" REDHAT_BUGZILLA_PRODUCT_VERSION=7.6 REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" REDHAT_SUPPORT_PRODUCT_VERSION="7.6" When I configure, the first error I got as below: gcc: error: unrecognized command line option '-V' gcc: fatal error: no input files compilation terminated. configure:5981: $? = 1 configure:5970: gcc -qversion >&5 gcc: error: unrecognized command line option '-qversion'; did you mean '--version'? gcc: fatal error: no input files compilation terminated. Other error messages are as follow: conftest.c:10:10: fatal error: ac_nonexistent.h: No such file or directory #include <ac_nonexistent.h> ^~~~~~~~~~~~~~~~~~ compilation terminated. configure:6497: $? = 1 configure: failed program was: | /* confdefs.h */ when I looked at the config.log file it was not clear to me. I have googled it but I did not find useful information. Would anyone please kindly give me some suggestions on this issue? I attach some files used for the compilation. The configure log: https://www.dropbox.com/s/5zgrh80yuut1y0e/config.log?dl=0 The make log: https://www.dropbox.com/s/2qoznk7s8cp8txz/make_log.txt?dl=0 Thanks again and best regards, Qianjin -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com> -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com>