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+
+This program does not unfortunately use the configure script, but I have been
+careful to write is as portably as possible -- it should only be using ISO C.
+
+In fact the only non-portable part is perhaps the Makefile for non UNIX-like
+systems.
+
+
+UNIX-like systems
+=================
+
+To build the software on unix, or a compatible build system (eg. cygwin),
+type the following:
+
+    cd src
+    make
+
+Then copy the casm executable wherever you want.  The documentation in the doc
+directory can also be copied wherever.
+
+The documentation is supplied pre-built, but if local changes are made it can
+be regenerated by:
+
+    cd doc
+    make
+
+Note that the documentation relies on asciidoc.
+
+
+Other or broken systems
+=======================
+
+If the Makefile is not usable on your system, you simply need to compile all
+the .c files and produce a single casm object.  E.g. (using the cc command
+as an example):
+
+    cd src
+    cc -o casm *.c