All Platforms System Requirements

  • CMOR 3.7.1 on conda-forge has support for Python 3.8, 3.9, 3.10, and 3.11.

  • The Python 3.11 build of CMOR 3.7.1 will NOT support CDMS2.

  • Anaconda

  • Make sure anaconda is in your PATH (assuming ananconda is installed in ${HOME}/anaconda)

    export PATH=${HOME}/anaconda/bin:${PATH} # for [ba]sh
    setenv PATH ${HOME}/anaconda/bin:${PATH} # for [t]csh

Bypassing firewalls

  • If your institution has a firewall

    conda config --set ssl_verify False

Installing CMOR and PrePARE

  • Run the following commands

    # install cmor
    # ------------------------------------------------
    conda create -n CMOR -c conda-forge cmor
    conda activate CMOR
    # Clone the CMIP6 table to your working directory.
    # ------------------------------------------------
    mkdir CMIP6_work
    cd  CMIP6_work
    # Disable SSL verification (firewall only).
    # -----------------------------------------
    export GIT_SSL_NO_VERIFY=true
    git clone
    # Note:
    # -----------------------------------------------------------
    # UDUNITS2_XML_PATH is set automatically by activating CMOR. 
    # export UDUNITS2_XML_PATH=${CONDA_PREFIX}/share/udunits/udunits2.xml


  • Run the CMIP6 CV Python tests

    # Install cmor with cdms2 and testsrunner
    # ------------------------------------------------
    conda install -n CMOR -c conda-forge -c cdat/label/nightly -c cdat cdms2 testsrunner
    # Clone the CMOR repository to your working directory.
    # ------------------------------------------------
    git clone
    cd cmor
    # Update the CMIP6 tables submodule.
    # ------------------------------------------------
    git submodule init
    git submodule update
    # Set PYTHONPATH to the Test directory.
    # ------------------------------------------------
    export PYTHONPATH=Test/
    # Run the tests.
    # ------------------------------------------------
    python -v2 -H -n1 Test/test_python_CMIP6_CV*.py
  • Run the full test suite for C, Fortran, and Python

    Install gcc and gfortran and linking environment variable


    conda install -n CMOR -c conda-forge gcc_linux-64 gfortran_linux-64
    export LDSHARED_FLAGS="-shared -pthread"


    conda install -n CMOR -c conda-forge clang_osx-64 gfortran_osx-64
    export LDSHARED_FLAGS=" -bundle -undefined dynamic_lookup"

    Build and run tests

    # Set prefix for configure step.
    # ------------------------------------------------
    export PREFIX=$(python -c "import sys; print(sys.prefix)")
    # Configure the Makefile.
    # ------------------------------------------------
    ./configure --prefix=$PREFIX --with-python --with-uuid=$PREFIX --with-json-c=$PREFIX --with-udunits2=$PREFIX --with-netcdf=$PREFIX  --enable-verbose-test
    # Run the tests with the Makefile (without rebuilding CMOR).
    # ------------------------------------------------
    make test -o cmor -o python

Conda environment

Obtaining Nighlty builds

  • Create a dedicated environment for nightly (in between releases code):
    conda create -n [YOUR_ENV_NAME_HERE] -c pcmdi/label/nightly -c conda-forge cmor
    source activate [YOUR_ENV_NAME_HERE]
Tags: conda