UNIX

A number of GNU tools are required, or at least highly recommended, in order to build HL-HDF. These tools are:
gzip (including zlib), version 1.1.0 or higher
tar
make, GNU Make version 3.7x or higher (or compatible)
all of which are available from http://www.gnu.org/. GNU C (and Fortran) compilers can also be retrieved from this site.

In order for gzip to work, the ZLIB compression library must be compiled and installed. ZLIB is available at http://www.cdrom.com/pub/infozip/zlib/.