可能重复：
The problem with installing PIL using virtualenv or buildout
how to install PIL on mac os x 10.7.2 Lion
我正在尝试在Mac OS X Lion（10.7.4）上安装最新版本的PIL（1.1.7）。我通常只使用PIP和以下命令：
sudo pip install package_name
但是，我收到了PIL的错误消息，因为它拒绝与我合作。
以下是我收到的内容：
mac-cordreys-macbook-pro:~ maccordrey$ sudo pip install PIL
Password:
Downloading/unpacking PIL
Downloading PIL-1.1.7.tar.gz (506Kb): 506Kb downloaded
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
llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -IlibImaging -I/System/Library/Frameworks/Python.framework/Versions/2.7/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _imaging.c -o build/temp.macosx-10.7-intel-2.7/_imaging.o
unable to execute llvm-gcc-4.2: No such file or directory
error: command 'llvm-gcc-4.2' failed with exit status 1
Complete output from command /usr/bin/python -c "import setuptools;__file__='/Users/maccordrey/build/PIL/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-KmYgGQ-record/install-record.txt:
WARNING: '' not a valid package name; please use only.-separated package names in setup.py
running install
running build
running build_py
creating build
creating build/lib.macosx-10.7-intel-2.7
copying PIL/__init__.py -> build/lib.macosx-10.7-intel-2.7
（为了节省空间，我已经编辑了这个中间部分，但它只是复制了包脚本。）
copying PIL/XVThumbImagePlugin.py -> build/lib.macosx-10.7-intel-2.7
running build_ext
--- using frameworks at /System/Library/Frameworks
building '_imaging' extension
creating build/temp.macosx-10.7-intel-2.7
creating build/temp.macosx-10.7-intel-2.7/libImaging
llvm-gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -mno-fused-madd -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -IlibImaging -I/System/Library/Frameworks/Python.framework/Versions/2.7/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _imaging.c -o build/temp.macosx-10.7-intel-2.7/_imaging.o
unable to execute llvm-gcc-4.2: No such file or directory
error: command 'llvm-gcc-4.2' failed with exit status 1
----------------------------------------
Command /usr/bin/python -c "import setuptools;__file__='/Users/maccordrey/build/PIL/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-KmYgGQ-record/install-record.txt failed with error code 1 in /Users/maccordrey/build/PIL
Storing complete log in /Users/maccordrey/Library/Logs/pip.log
任何建议将不胜感激！谢谢！
我还应该注意，在尝试安装Pillow时，我收到了完全相同的错误消息。