[AD] abi._tx for Mac

[Peter Hull <peter.hull90@xxxxxxxxxx>]

Please find attached a note on binary compatibility for the Mac. Let me know 
if it's not clear.

Pete

Index: docs/src/abi._tx
===================================================================
RCS file: /cvsroot/alleg/allegro/docs/src/abi._tx,v
retrieving revision 1.11
diff -u -r1.11 abi._tx
--- docs/src/abi._tx	19 Aug 2005 15:26:59 -0000	1.11
+++ docs/src/abi._tx	25 Aug 2005 17:13:27 -0000
@@ -109,14 +109,29 @@
    your copy of Allegro must NOT have assembly routines enabled (it
    wouldn't work anyhow).
 
-
-
 @heading
 MacOS X notes
 
-   XXX fill this in
-
-
+   On OSX there are two 'styles' of linking - Unix style and Mac style.
+   For the Unix style linking, you would use `allegro-config --libs`
+   on the link line. For versioning, follow the advice given in the
+   'Linux on x86' section above, using the command otool -L instead
+   of ldd.
+
+   For example, otool -L &ltmybinary&gt should give
+
+      liballeg-4.2.dylib (compatibility version 4.2.0, current version 4.2.0)
+
+   For the Mac style, use `allegro-config --frameworks` on the link
+   line, or add Allegro.framework to your project if you are using 
+   XCode. In this case, the versioning is done inside the framework
+   itself.
+
+   Apple recommends that an application should be entirely self-
+   contained. To achieve this in Allegro, static-link the executable
+   and use fixbundle to bind all its resources together. In this
+   way, you will not need to worry about incompatible versions of
+   the library. This is useful if you are distributing an application.
 
 @heading
 Final notes