To compile and install WFC software you'll need a UNIX based computer system and the PATH should be set in a such way all compilers and UNIX utilities can be found, which is normally the case. Programs like make , tar , gunzip
are supposed to be on your system and along the PATH .
In order to compile all software you need an ANSI C compiler
( gcc
version 
2.6.3 is OK) and a FORTRAN 77 compiler.
gcc
is from the GNU Free Software Foundation and can be
ftp'd from ftp://prep.ai.mit.edu/pub/gnu
.
Stage I software also needs a FTOOLS implementation. We currently use version 3.4. Stage II software only needs the PGPLOT part of the FTOOLS distribution. FTOOLS is from NASA's HEASARC and can be ftp'd from ftp://legacy.gsfc.nasa.gov/software/ftools .