http://svn.python.org/view?rev=63955&view=rev
"MacOS X: Enable 4-way universal builds ..."

This revision made the following change to Mac/Makefile.in:
http://svn.python.org/view/python/trunk/Mac/Makefile.in?rev=63955&view=diff&r1=63955&r2=63954&p1=python/trunk/Mac/Makefile.in&p2=/python/trunk/Mac/Makefile.in

The last hunk (part of the "installmacsubtree" target) and a bit of the
preceding hunk uses `arch` with arguments:
---------------------------------
 install_BuildApplet:
-	$(RUNSHARED) $(BUILDPYTHON) $(srcdir)/scripts/BuildApplet.py \
+	$(RUNSHARED) arch -ppc -i386 $(BUILDPYTHON)
$(srcdir)/scripts/BuildApplet.py \
 		--destroot "$(DESTDIR)" \
-		--python $(INSTALLED_PYTHONAPP) \
+	
--python=$(prefix)/Resources/Python.app/Contents/MacOS/$(PYTHONFRAMEWORK)`test
-f
"$(DESTDIR)$(prefix)/Resources/Python.app/Contents/MacOS/$(PYTHONFRAMEWORK)-32"
&& echo "-32"`  \
 		--output "$(DESTDIR)$(PYTHONAPPSDIR)/Build Applet.app" \
 		$(srcdir)/scripts/BuildApplet.py
 
@@ -225,7 +279,7 @@
 	done
 
 
-	$(RUNSHARED) $(BUILDPYTHON) $(CACHERSRC) -v $(DESTDIR)$(MACLIBDEST)
$(DESTDIR)$(MACTOOLSDEST)
+	$(RUNSHARED) arch -ppc -i386 $(BUILDPYTHON) $(CACHERSRC) -v
$(DESTDIR)$(MACLIBDEST) $(DESTDIR)$(MACTOOLSDEST)
 	$(RUNSHARED) $(BUILDPYTHON) -Wi -tt $(compileall) -d $(MACTOOLSDEST)
-x badsyntax $(DESTDIR)$(MACTOOLSDEST)
 	$(RUNSHARED) $(BUILDPYTHON) -O -Wi -tt $(compileall) -d
$(MACTOOLSDEST) -x badsyntax $(DESTDIR)$(MACTOOLSDEST)
---------------------------------

That form of calling `arch` is only supported on Mac OS X 10.5
(Leopard), I believe.

----------------------------------
$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.4.11
BuildVersion:   8S2167
$ man arch | cat

ARCH(1)                   BSD General Commands Manual                 
ARCH(1)

NAME
     arch -- print architecture type

SYNOPSIS
     arch

DESCRIPTION
     The arch command displays the machine's architecture type.

SEE ALSO
     machine(1)

Mac OS                          August 20, 1997                        
Mac OS
----------------------------------


Here is the current man page for arch (I had to look to try to see what
Ronald was trying to do with the Makefile change) :)
http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/arch.1.html

I don't fully understand why the "arch -ppc -i386" is necessary for
"$(BUILDPYTHON)".


I'm not sure what the easiest solution to this would be... or if
supporting "make frameworkinstallframework" (which eventually calls this
target) on Mac OS X <10.5 is considered important enough.

Perhaps a new 
  RUNARCH=@RUNARCH@
could be added to Mac/Makefile.in with the associated configure support
to have that be blank unless `--with-universal-archs=all` was specified?

Similar change in Mac/IDLE/Makefile.in:

-----------------------------
--- python/trunk/Mac/IDLE/Makefile.in	(original)
+++ python/trunk/Mac/IDLE/Makefile.in	Thu Jun  5 14:58:24 2008
@@ -42,7 +42,7 @@
 		$(srcdir)/../Icons/PythonSource.icns \
 		$(srcdir)/../Icons/PythonCompiled.icns Info.plist
 	rm -fr IDLE.app
-	$(RUNSHARED) $(BUILDPYTHON) $(BUNDLEBULDER) \
+	$(RUNSHARED) arch -ppc -i386 $(BUILDPYTHON) $(BUNDLEBULDER) \
 		--builddir=. \
 		--name=IDLE \
 		--link-exec \
-----------------------------

Alternative potential solution: use the ARCHPREFERENCE environment
variable as described in the Mac OS X 10.5 arch man page. Ronald, if you
could test if that works for you on 10.5, then presumably setting that
environment var would be safely ignored on Mac OS X <10.5. Thoughts?

This patch is wrong, it drops the call to 'arch' entirely even when the 
call is needed.

The suggestion for "ARCHPREFERENCE" won't work though, "arch" doesn't take 
arguments at all on 10.4.


BTW. This is a duplicate of issue 3381, which includes a patch for fixing 
the issue.

The current trunk should be correct, there are no explicit calls to the 
arch command left, all go through the configure replacement magic.

To test if everything is correct now someone should test the following 
scenarios:

* Build --enable-framework --enable-universalsdk on 10.4

* Build --enable-framework --enable-universalsdk on 10.5

* Build --enable-framework --enable-universalsdk --with-universal-
archs=all on 10.5

I cannot test the first one, and will test the last one (which is the 
one I'm most interested in).

BTW. There is a "--with-framework-name" argument to configure that makes 
it possible to have several indepenend framework installations

> The current trunk should be correct, there are no explicit calls to the
> arch command left, all go through the configure replacement magic.

--------------------
$ svn info
Path: .
URL: svn+ssh://pythondev@svn.python.org/python/trunk/Mac
Repository Root: svn+ssh://pythondev@svn.python.org
Repository UUID: 6015fed2-1504-0410-9fe1-9d1591cc4771
Revision: 65091
Node Kind: directory
Schedule: normal
Last Changed Author: ronald.oussoren
Last Changed Rev: 65091
Last Changed Date: 2008-07-17 22:48:03 -0700 (Thu, 17 Jul 2008)
Properties Last Updated: 2008-07-17 22:55:32 -0700 (Thu, 17 Jul 2008)

[trentm@mower:~/src/python/Mac]
$ svn up Makefile.in
At revision 65091.
[trentm@mower:~/src/python/Mac]
$ grep "arch -" Makefile.in
        $(RUNSHARED) arch -ppc -i386 $(BUILDPYTHON)
$(srcdir)/scripts/BuildApplet.py \
        $(RUNSHARED) arch -ppc -i386 $(BUILDPYTHON) $(CACHERSRC) -v
$(DESTDIR)$(MACLIBDEST) $(DESTDIR)$(MACTOOLSDEST)
--------------------

Apologies if I am missing something. Your patches for issue 3381 did
not include a change to Mac/Makefile.in.

Trent