gcc error in Mac OS X

[Zhaojie Boulder]

Hello,
I am new to Mac and used python in linux before. What I am trying to do is
to install "Ipython" and "PyCogent" in Mac OS X.

For PyCogent, after entering the package path, I typed "python setup.py
install". The results are as follows:

Didn't find Pyrex - will compile from .c files
running install
running build
running build_py
running build_ext
building 'cogent.align._compare' extension
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd
-fno-common -dynamic -DNDEBUG -g -Os -Wall -Wstrict-prototypes -DMACOSX
-I/usr/include/ffi -DENABLE_DTRACE -arch i386 -arch ppc -pipe
-I/Users/zhaojie/Downloads/PyCogent-1.0.1/include
-I/System/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5
-c cogent/align/_compare.c -o
build/temp.macosx-10.5-i386-2.5/cogent/align/_compare.o -w
unable to execute gcc: No such file or directory
error: command 'gcc' failed with exit status 1

After google, I installed Xcode,but it did not help. Also, the Xcode folder
is not within "applications" folder, but a separate one parallel with
"applications". Dragging Xcode folder into the applications folder did not
make a difference, either.

Hope someone familiar with Mac can help me out.

Thank you,

Jie
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