to build ciso
install zlib-devel and zlib1g-devel

in Konsole type:

gcc -o ciso ciso.c -lz

ciso will be created warnings are OK if there is no errors
to make ciso executable type:

chmod a+x ciso

copy ciso to path eg. "/usr/local/bin" 

Usage: ciso level infile outfile
  level: 1-9 compress ISO to CSO (1=fast/large - 9=small/slow
         0   decompress CSO to ISO