I'm having trouble building MySQLdb on Mac OSX Mountain Lion. After upgrading to OSX Mountain Lion from OSX Lion, I have downloaded and installed Xcode 4.4 also. Then, I went to Preference > Downloads of the Xcode and installed Command Line Tools.
I've downloaded MySQL-python ver. 1.2.3 from http://sourceforge.net/projects/mysql-python/
When I run
python setup.py build
I get below message:
running build
running build_py
copying MySQLdb/release.py -> build/lib.macosx-10.6-intel-2.7/MySQLdb
running build_ext
building '_mysql' extension
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -g -O2 -DNDEBUG -g -O3 -Dversion_info=(1,2,3,'final',0) -D__version__=1.2.3 -I/usr/local/mysql/include -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c _mysql.c -o build/temp.macosx-10.6-intel-2.7/_mysql.o -Os -g -fno-common -fno-strict-aliasing -arch x86_64
unable to execute gcc-4.2: No such file or directory
error: command 'gcc-4.2' failed with exit status 1
However, the gcc exists. When I run
gcc
I get
i686-apple-darwin11-llvm-gcc-4.2: no input files
Below is a similar question that I have found but its solution, which is exactly what I have done already, doesn't work for me.
I've had a similar problem while working with Ruby On Rails 3.2.7. I too had upgraded the system to Mountain Lion, installed Xcode 4.4.1 and downloaded the Command Line Tools.
On the command line I got an error message saying it was impossible to find the file: /usr/bin/gcc-4.2 (I can't paste the precise output right now, I'm sorry).
I did have a /usr/bin/gcc and its version was i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1
I solved the problem by symlinking the file in the same directory and giving it the name the Ruby script was looking for:
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
After that, everything worked fine.
Use the following command to make make (or similiar) use the correct gcc:
export CC=/usr/bin/gcc
I ran into this. For me it was because I installed python from a DMG installer at http://python.org . Those are built against the wrong gcc. I fixed it by compiling python from source using Homebrew: http://mxcl.github.com/homebrew/
brew install python
That links against the correct gcc
(In my specific case I was using an older Python which is why I had used a DMG installer. I discovered that homebrew also has formulas for older versions)
I detoured this problem by using ActivePython.
There's specific installation instruction for MySQLdb here.
Since this is the first time I've used ActivePython I'm not sure if this' a robust solution for this problem. Therefore, I will leave this question open until I make sure this works.
来源：https://stackoverflow.com/questions/11833838/gcc-4-2-error-on-mac-osx-mountain-lion-unable-to-install-mysql-python