PIL error in MAC OS

gistfile1.txt

Downloading/unpacking PIL
  Running setup.py egg_info for package PIL
    WARNING: '' not a valid package name; please use only.-separated package names in setup.py
Installing collected packages: PIL
  Running setup.py install for PIL
    WARNING: '' not a valid package name; please use only.-separated package names in setup.py
    --- using frameworks at /System/Library/Frameworks
    building '_imaging' extension
    gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -DHAVE_LIBJPEG -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -I/opt/local/include/freetype2 -IlibImaging -I/opt/local/include -I/Users/arthurnn/Envs/myblog/include -I/usr/local/include -I/usr/include -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c _imaging.c -o build/temp.macosx-10.6-universal-2.6/_imaging.o
    _imaging.c:3017: warning: initialization from incompatible pointer type
    _imaging.c:3077: warning: initialization from incompatible pointer type
    /usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/as: assembler (/usr/bin/../libexec/gcc/darwin/ppc/as or /usr/bin/../local/libexec/gcc/darwin/ppc/as) for architecture ppc not installed
    Installed assemblers are:
    /usr/bin/../libexec/gcc/darwin/x86_64/as for architecture x86_64
    /usr/bin/../libexec/gcc/darwin/i386/as for architecture i386
    _imaging.c:3017: warning: initialization from incompatible pointer type
    _imaging.c:3077: warning: initialization from incompatible pointer type
    _imaging.c:3281: fatal error: error writing to -: Broken pipe
    compilation terminated.
    _imaging.c:3017: warning: initialization from incompatible pointer type
    _imaging.c:3077: warning: initialization from incompatible pointer type
    lipo: can't open input file: /var/tmp//cchMR6LG.out (No such file or directory)
    error: command 'gcc-4.2' failed with exit status 1
    Complete output from command /Users/arthurnn/Envs/myblog/bin/python -c "import setuptools;__file__='/Users/arthurnn/Envs/myblog/build/PIL/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-ZHaM_R-record/install-record.txt --install-headers /Users/arthurnn/Envs/myblog/bin/../include/site/python2.6:
    WARNING: '' not a valid package name; please use only.-separated package names in setup.py

running install

running build

running build_py

running build_ext

--- using frameworks at /System/Library/Frameworks

building '_imaging' extension

gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -DHAVE_LIBJPEG -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -I/opt/local/include/freetype2 -IlibImaging -I/opt/local/include -I/Users/arthurnn/Envs/myblog/include -I/usr/local/include -I/usr/include -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c _imaging.c -o build/temp.macosx-10.6-universal-2.6/_imaging.o

_imaging.c:3017: warning: initialization from incompatible pointer type

_imaging.c:3077: warning: initialization from incompatible pointer type

/usr/libexec/gcc/powerpc-apple-darwin10/4.2.1/as: assembler (/usr/bin/../libexec/gcc/darwin/ppc/as or /usr/bin/../local/libexec/gcc/darwin/ppc/as) for architecture ppc not installed

Installed assemblers are:

/usr/bin/../libexec/gcc/darwin/x86_64/as for architecture x86_64

/usr/bin/../libexec/gcc/darwin/i386/as for architecture i386

_imaging.c:3017: warning: initialization from incompatible pointer type

_imaging.c:3077: warning: initialization from incompatible pointer type

_imaging.c:3281: fatal error: error writing to -: Broken pipe

compilation terminated.

_imaging.c:3017: warning: initialization from incompatible pointer type

_imaging.c:3077: warning: initialization from incompatible pointer type

lipo: can't open input file: /var/tmp//cchMR6LG.out (No such file or directory)

error: command 'gcc-4.2' failed with exit status 1

----------------------------------------
Command /Users/arthurnn/Envs/myblog/bin/python -c "import setuptools;__file__='/Users/arthurnn/Envs/myblog/build/PIL/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-ZHaM_R-record/install-record.txt --install-headers /Users/arthurnn/Envs/myblog/bin/../include/site/python2.6 failed with error code 1
Storing complete log in /Users/arthurnn/.pip/pip.log