HEALPIX Gnu Data Language instruction notice for Mageia ---------------------------------------------------------------- The healpix GDL/IDL routines are installed in the default GDL library directory: /usr/share/gnudatalanguage/lib/healpix together with a startup configuration file, "HEALPIX_startup.gdl" installed in /usr/share/gnudatalanguage which automatically updates the GDL path to look for them. This configuration file needs to be loaded by specifying both the HEALPIX and GDL_STARTUP environment variables: export HEALPIX=/usr export GDL_STARTUP=/usr/share/gnudatalanguage/HEALPIX_startup.gdl Adding the two above lines to your shell (e.g. ~/.bashrc) should be enough to get the whole set of healpix routines available each time you start GDL.