You can use Subversion to track the OpenMCL sources.

First, check out an initial copy.  As of early February 2008, the sources to the 1.1 "release" are in
a branch (rather than in the svn trunk as they had been previously.)

{{{
$ svn co http://svn.clozure.com/publicsvn/openmcl/branches/1.1/ccl
A    ccl/l1-fasls
A    ccl/l1-fasls/.cvsignore
A    ccl/LICENSE
A    ccl/cocoa-ide
A    ccl/cocoa-ide/processes-window.lisp
A    ccl/cocoa-ide/hemlock
A    ccl/cocoa-ide/hemlock/hemlock11.cursor
A    ccl/cocoa-ide/hemlock/website
A    ccl/cocoa-ide/hemlock/website/index.html.in
.
.
.
A    ccl/examples/addressbook.lisp
A    ccl/examples/gtk-minesweeper.lisp
A    ccl/examples/.cvsignore
 U   ccl
Checked out revision 7568.
$
}}}

You need a lisp kernel and a heap image so you can compile
the sources.  Grab the most recent snapshot tarball from
ftp://clozure.com/pub/testing/ and unpack it somewhere.  Copy the
lisp kernel and the heap image (`dx86cl64` and `dx86cl64.image` if
you're running x86-64 Leopard, `lx86cl64` and `LX86CL64` if you're running x86_64 linux) over to where you just checked out the
sources.

Next, copy over the interface databases from the snapshots.  Just copy
the `.cdb` files. 

For example, on an x86-64 Leopard system, you'd do something
like this:

{{{
$ cd /path/to/snapshot/ccl
$ cp darwin-x86-headers64/libc/*.cdb /path/to/svn/ccl/darwin-x86-headers64/libc
}}}

See UpdatingFromSource for information on how to get
the x86-64 interface files for Cocoa.

Go back to your sources that you checked out with Subversion, and rebuild the lisp.
Again, on x86-64 Leopard:
{{{
$ ./dx86cl64
Welcome to OpenMCL Version 1.1-r7527M (DarwinX8664)! (or whatever)
? (rebuild-ccl :force t)
}}}

There might be some compiler warnings, and if there's a CERROR complaining
about redefining a constant or something, it should
be safe to continue from it.

Now you've got an up-to-date OpenMCL.
Whever you want, tell Subversion to update the sources.
{{{
$ svn update
U     some-file.lisp
Updated to revision xxxx.
}}}

After updating, rebuild the lisp as outlined above.



See also: UpdatingFromSource