M>no longer interested in these
antiquated environments</EM>.  With the general availability of
the freely available GCC compiler, I
see no reason to incorporate modifications to the software for these
purposes.

<P>
An effort has been made to isolate as many of the
operating system-dependencies
as possible in two files: <B>tiffcomp.h</B> and
<B>libtiff/tif_&lt;os&gt;.c</B>.  The latter file contains
operating system-specific routines to do I/O and I/O-related operations.
The UNIX (<B>tif_unix.c</B>),
Macin