Added Jeff Rush' comments

PC/readme.txt

@@ -192,3 +192,42 @@ wat_dos     A 32-bit extended DOS Python (console-mode) using the
 
 wat_os2     A 32-bit OS/2 Python (console-mode).
             Sockets are not included.
+
+IBM VisualAge C/C++ for OS/2
+============================
+
+To build Python for OS/2, change into ./os2vacpp and issue an
+'NMAKE' command.  This will build a PyCore15.dll containing the
+set of Python modules listed in config.c and a small Python.exe
+to start the interpreter.
+
+During the build process you will see a couple of harmless warnings:
+
+  From the C Compiler, "No function prototype given for XXX", which
+  comes from the use of K&R parameters within Python for portability.
+
+  From the ILIB librarian, "Module Not Found (XXX)", which comes
+  from its attempt to perform the (-+) operation, which removes and
+  then adds a .OBJ to the library.  The first time a build is done,
+  it obviously cannot remove what is not yet built.
+
+This build includes support for most Python functionality as well
+as TCP/IP sockets.  It omits the Posix ability to 'fork' a process
+but supports threads using OS/2 native capabilities.  I have tried
+to support everything possible, even popen() to run a child process
+and communicate with it via a pipe.
+
+With respect to the environment variables for Python, I use the
+following setup:
+
+    Set PYTHONHOME=E:\Tau\Projects\Python
+    Set PYTHONPATH=.;E:\Tau\Projects\Python\Lib; \
+                     E:\Tau\Projects\Python\Lib\Plat-OS2
+
+If you have questions or problems specifically with the VAC++ port
+of Python, please contact me at:
+
+    Jeff Rush <jrush@summit-research.com>.
+
+I support no other platform but OS/2 (and eventually AmigaDOS).
+