$ bdist_mpkg
basedirlist is: ['/usr/local/', '/usr', '/usr/X11']
============================================================================
BUILDING MATPLOTLIB
           matplotlib: 1.2.0rc2
               python: 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 14:13:39)
                       [GCC 4.0.1 (Apple Inc. build 5493)]
             platform: darwin

REQUIRED DEPENDENCIES
                numpy: 1.6.2
            freetype2: found, but unknown version (no pkg-config)

OPTIONAL BACKEND DEPENDENCIES
               libpng: found, but unknown version (no pkg-config)
              Tkinter: Tkinter: version not identified, Tk: 8.4, Tcl: 8.4
                 Gtk+: no
                       * Building for Gtk+ requires pygtk; you must be able
                       * to "import gtk" in your build/install environment
      Mac OS X native: yes
                   Qt: no
                  Qt4: no
               PySide: no
                Cairo: no

OPTIONAL DATE/TIMEZONE DEPENDENCIES
             dateutil: matplotlib will provide
                 pytz: matplotlib will provide
adding pytz

OPTIONAL USETEX DEPENDENCIES
               dvipng: no
          ghostscript: /bin/sh: line 1: gs: command not found
                latex: no

[Edit setup.cfg to suppress the above messages]
============================================================================
...
gcc-4.0 -fno-strict-aliasing -fno-common -dynamic -isysroot 
/Developer/SDKs/MacOSX10.4u.sdk -arch ppc -arch i386 -g -O2 -DNDEBUG -g 
-O3 -DPY_ARRAY_UNIQUE_SYMBOL=MPL_ARRAY_API -DPYCXX_ISO_CPP_LIB=1 
-I/usr/local/include -I/usr/include -I/usr/X11/include 
-I/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-pa
ckages/numpy/core/include -I/usr/local/include -I/usr/include -I. 
-I/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-pa
ckages/numpy/core/include -Isrc -Iagg24/include -I. 
-I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c 
src/_macosx.m -o build/temp.macosx-10.3-fat-2.7/src/_macosx.o
src/_macosx.m: In function 'FigureCanvas_write_bitmap':
src/_macosx.m:3557: error: request for member 'pixelsWide' in something 
not a structure or union
src/_macosx.m:3557: error: request for member 'pixelsHigh' in something 
not a structure or union
src/_macosx.m: In function 'FigureCanvas_write_bitmap':
src/_macosx.m:3557: error: request for member 'pixelsWide' in something 
not a structure or union
src/_macosx.m:3557: error: request for member 'pixelsHigh' in something 
not a structure or union
lipo: can't figure out the architecture type of: /var/tmp//ccpc0juI.out
error: command 'gcc-4.0' failed with exit status 1