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+== Intro ==
+
+The heavy lifting is done in libvxiclient.c.
+This can be linked against some other C code to make a 
+little VXI11 client. client.c is a little scrappy test
+client..
+
+== Requirements ==
+
+- portmapper or rpcbind is needed for the interrupt server.
+If you don't use interrupts you don't need it.
+
+- glib/gthread, these are used to create threads for things
+like the interrupt service and to handle some inter-thread
+things like waiting for the interrupt service thread to 
+start and get a port number.
+
+- a libc that supports rpc.. all unix oses should be fine.
+
+== Debugging output ==
+
+There are lots of printf("blah.. in the source code to help
+with finding weird bugs (mainly issues interacting with perl)
+these can all be disabled by removing #define DEBUG from the 
+top of libvxi11client.c
+
+== Perl module ==
+
+The perl module is a thin wrapper around the C could using
+perl's XS functionality (http://perldoc.perl.org/perlxs.html).
+The guts of this are are perlbits/Client.xs.
+There are then some perl wrapper functions to help with
+pulling arguments out of a hash and passing it to the XS code.
+This are in perlbits/Client.pm.
+
+The perl module has one more requirement; ExtUtils::PkgConfig.
+This is only used at build time and is used to find where
+the glib/gthread headers are and get the right CFLAGS.
+
+$make perl; will generate the source for a perl module;
+-- it generates a skeleton module with h2xs
+-- it copies in the parts of the module that I have customised
+-- it copies in the bits of source code needed
+-- it then runs the Makefile.PL to generate the real make file
+-- it then calls make and make test to compile the module and run
+   the test script
+
+The perl module is free standing and doesn't depend on the main 
+source. If you want to distribute the  perl module as a perl module
+you would distribute the VXI11-Client directory that is generated by 
+make perl.