The programs hevea and hacha are written in Objective Caml. Thus, you really need Objective Caml (version 2.00 or further) to compile them. However, a Red Hat 5.2 binary distribution is also available, it does not require an Objective Caml installation and can be installed on most Red Hat Linux PC's.
HEVEA users may instruct the program not to process a part of the input (see section 6). Instead, this part is processed into a
To benefit from the full functionality of HEVEA, you need all this software. However, HEVEA runs without them, but then you will to manage to produce images by yourself.
Note that the hevea.sty file is simply copied to HEVEA library directory. It remains users responsibility to make it accessible to LATEX.