This stuff was written to demonstarte how to make xfd slaves with C
language (and because I had compress and GZip sources :-)

This example uses SAS-C as compiler, but it should be possible to use
any other C compiler as well.
Some things are important, when you use another compiler: 
- Either extheader.o or ExeHead.o must be linked as first file.
- You have to link without startup code.
- You should use global data model.
- You may not use any functions, which require dos.library in xfd Slave
  version (with extheader.o).
- Maxon C for example does not support local library bases.

There are two possible Files, which can be created:

1) Two xfd Slaves called UNIX-Compress and GZip. This is done by linking
   extheader.o as first object.
   Call 'smake' or 'smake XFD' to get this result
2) Two normal executables, which enables you to test your routines. This is
   done by linking ExeHead.o as first object.
   Call 'smake EXE' to get this result.
   The executable can get two parameters: the infile and possibly an
   outfile. When no outfile is given, then the save routine is skipped.
3) Call 'smake All' to get both results.

Object files are created in T: and thus need not to be deleted from
source directory.

The files extheader.c and ExeHead.c are made in a manor which allows to use
them for other slaves as well.

Dirk Stöcker <stoecker@amigaworld.com>

1st November 1998