Installing PIL on OS X Lion (complete noob)

Question

I want to run python's ndimage to do some image analysis. I have a 64-bit Mac running OSX Lion and Python 2.7. When I tried to run commands from ndimage commands I found out that I need to install PIL.

I downloaded that and unzipped it (for now into the downloads folder, is there a better place to do it?). I run setup.py and get these messages:

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 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -IlibImaging -I/Library/Frameworks/Python.framework/Versions/2.7/include -I/usr/include -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _imaging.c -o build/temp.macosx-10.6-intel-2.7/_imaging.o
unable to execute gcc-4.2: No such file or directory
error: command 'gcc-4.2' failed with exit status 1

I read Failed to build PIL on Mac OS X 10.7 Lion and made sure that I have the 32/64 bit version of python 2.7 installed (Mac OS X 64-bit/32-bit x86-64/i386 Installer (2.7.2) for Mac OS X 10.6 and 10.7 ). I also have Xcode installed. Am I doing something stupid here?

Edit 1: looking further, I have found this gcc-4.2 failed with exit status 1. I've tried entering this when I get the error:

llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -IlibImaging -I/Library/Frameworks/Python.framework/Versions/2.7/include -I/usr/include -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _imaging.c -o build/temp.macosx-10.6-intel-2.7/_imaging.o

and I get these messages:

_imaging.c:3017: warning: initialization from incompatible pointer type
_imaging.c:3077: warning: initialization from incompatible pointer type
_imaging.c:3017: warning: initialization from incompatible pointer type
_imaging.c:3077: warning: initialization from incompatible pointer type

Edit 2: I'm not sure if this is the right way to go, but I found a post on installing pil on OSX Leopard and, following its advice, got rid of the -arch i386 part of the command and entered:

 llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch x86_64 -g -O2 -DNDEBUG -g -O3 -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -IlibImaging -I/Library/Frameworks/Python.framework/Versions/2.7/include -I/usr/include -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _imaging.c -o build/temp.macosx-10.6-intel-2.7/_imaging.o

Now I only get two errors:

_imaging.c:3017: warning: initialization from incompatible pointer type
_imaging.c:3077: warning: initialization from incompatible pointer type

From what I can tell at this point the program poops out and doesn't finish compiling. Can anyone help me take it from here?

Answer 1

https://github.com/kennethreitz/osx-gcc-installer/downloads

Download GCC for lion. It solved all the error: command 'gcc-4.2' failed with exit status 1 problems.