Compiling GDL (gnudatalanguage)

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GDL (GNU Data Language) is a free open-source program that runs most IDL code. Specifically, GDL is said to be completely IDL 7.1 compatible, and has many features from IDL 8. GDL is easily installed by:

or you can compile GDL from source.


  1. Prereqs
    apt install libbz2-dev libplplot-dev libfontconfig1-dev libncurses5-dev libreadline-dev libgsl0-dev libwxgtk3.0-dev libmagick++-dev libnetcdf-dev libhdf4-alt-dev libgraphicsmagick++1-dev libhdf5-serial-dev libfftw3-dev python-dev libeigen3-dev pslib-dev libqhull-dev
  2. Download GDL source and extract

    tar xf gdl-*.gz
    cd gdl-*
  3. Compile GDL Gnu Data Language program
    mkdir release
    cd release
    cmake --build . -j -- -l 4

    If you have Anaconda Python installed, add PATH=/bin:/usr/bin to the front of the cmake .. command.

  4. Check the install:
    cmake --build . -- check

    You will see several plots appearing and disappearing automatically during this test, which takes a few minutes. With GDL 0.9.8 on Ubuntu 18.04, I got:

    The following tests FAILED:
     93 - (Failed)
       96 - (Failed)
     	 103 - (Failed)
      106 - (Failed)
      114 - (Failed)
      123 - (Failed)
      129 - (Failed)
      140 - (Failed)
      142 - (Failed)
      144 - (Failed)
      166 - (Failed)
      168 - (Failed)
      190 - (Failed)
  5. install (do not use sudo)
    cmake --build . --target install

    Given the cmake command of step #3, this installs under ~/.local


  • Do not build on an ExFAT drive, as the build will fail since symbolic links are not allowed on ExFAT
  • If cmake reports libeigen being too old, read below to the optional LibEigen3 section, or use -DEIGEN3=OFF
  • If you wish to use your Linux repo’s older version of IDL, just use /usr/local/bin/gdl or similar, or rename ~/.local/bin/gdl to ~/.local/bin/gdl0.98 or similar.


  • Errors on runtime search path conflicts: temporarily comment out those paths in ~/.bashrc (typically from Anaconda Python, libreadline, libhistory, libz,
  • cmake error about libeigen being too old: get a newer libeigen by downloading libeigen and extract to ~/libeigen. Then, recompile GDL with
    cmake -DEIGEN3DIR=$HOME/libeigen  (rest of your options)
    cmake --build . -j -- -l 4
    cmake --build . -- check
    cmake --build . --target install

OR you can compile as in the section below

Basic GDL Compilation

If you’re having problems with LZMA errors, you can try disabling HDF5 by adding option cmake -DHDF5=OFF ..

LibEigen (optional)

When compiling GDL, you may need a libeigen3 newer than your operating system supports – feel free to download a newer version of libeigen3 and compile:

apt install gfortran libsuperlu3-dev libmetis-dev libscotch-dev libmpfr-dev libadolc-dev qt4-qmake

cd /tmp

tar xf 3.*.tar.bz2

cd eigen* && mkdir release && cd release

cmake ..

make install

GDL missing libraries fix

ln -s /usr/lib/x86_64-linux-gnu/ /usr/local/lib/

ln -s /usr/lib/ /usr/local/lib/

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