[m-rev.] diff: clarify a point in README.MacOS

[Julien Fischer]

Branches: main, 10.04

README.MacOS:
 	The advice conerning 64-bit Mercury here only applies to
 	x86-64 machines.

Julien.

Index: README.MacOS
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/README.MacOS,v
retrieving revision 1.14
diff -u -r1.14 README.MacOS
--- README.MacOS	9 Jun 2010 04:38:28 -0000	1.14
+++ README.MacOS	13 Jul 2010 05:39:48 -0000
@@ -15,15 +15,16 @@
  will require a working Erlang installation.)

  By default, 64-bit versions of the executables and libraries in the Mercury
-system will be installed on Mac OS X 10.6.  To build a 32-bit installation on
-10.6, you need to arrange to have the option "-m32" passed to gcc.  This can be
-done by invoking Mercury's configure script with the option:
+system will be installed on x86-64 machines running Mac OS X 10.6.  To build a
+32-bit installation on such a machine, you need to arrange to have the option
+"-m32" passed to gcc.  This can be done by invoking Mercury's configure script
+with the option:

      --with-cc="gcc -m32"

  By default, 32-bit versions of the executables and libraries are installed on
-Mac OS X 10.5.  To build and install 64-bit Mercury on that system you must
-pass the "-m64" option to gcc. 
+x86-64 machines running Mac OS X 10.5.  To build and install 64-bit Mercury on
+such a system you must pass the "-m64" option to gcc.

  Note that if you are building Mercury from scratch using an existing installed
  Mercury compiler, i.e. you are not installing using the pre-generated C files in
--------------------------------------------------------------------------
mercury-reviews mailing list
Post messages to:       mercury-reviews at csse.unimelb.edu.au
Administrative Queries: owner-mercury-reviews at csse.unimelb.edu.au
Subscriptions:          mercury-reviews-request at csse.unimelb.edu.au
--------------------------------------------------------------------------