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pyzmq installation error with dependency on gcc

I tried installing pyzmq by http://ipython.org/ipython-doc/dev/install/install.html as I want to install ipython. But it has dependency on pyzmq which has dependency on gcc. I already have gcc installed but still I am getting the following error while install pyzmq.
compilation terminated.
error: Setup script exited with error: command 'gcc' failed with exit status 1
The script also has following in it:
If you expected pyzmq to link against an installed libzmq, please check to make sure:
* You have a C compiler installed
* A development version of Python is installed (including headers)
* A development version of ZMQ >= 2.1.4 is installed (including headers)
* If ZMQ is not in a default location, supply the argument --zmq=<path>
* If you did recently install ZMQ to a default location,
try rebuilding the ld cache with `sudo ldconfig`
or specify zmq's location with `--zmq=/usr/local`
You can skip all this detection/waiting nonsense if you know
you want pyzmq to bundle libzmq as an extension by passing:
`--zmq=bundled`
I will now try to build libzmq as a Python extension
I already have all the above but still issues. I am guessing I have path issues i.e. may be pyzmq is looking at other location but how do I solve this problem

This is a huge issue in Windows to install ipython. I would recommend Windows users to never go the pip or easy_install way to install it. I faced a lot of issues like above. I read that it still has dependencies issues on github i.e. via pip.
I got it installed finally by this:
Download and install Anaconda
Update IPython to the current version by:
Go to Anaconda directory or look for anaconda cmd & do the following:
conda update conda
conda update ipython

Cannot easy_install readline for Python 2.7.3 on Mac Os Lion

I am trying to install the python readline module. I have already installed readline via homebrew.
If I type
easy_install readline
I get
Downloading http://pypi.python.org/packages/source/r/readline/readline-6.2.2.tar.gz#md5=ad9d4a5a3af37d31daf36ea917b08c77
Processing readline-6.2.2.tar.gz
Writing /var/folders/44/dhrdb5sx53s243j4w03063vh0000gn/T/easy_install-64FbG8/readline-6.2.2/setup.cfg
Running readline-6.2.2/setup.py -q bdist_egg --dist-dir /var/folders/44/dhrdb5sx53s243j4w03063vh0000gn/T/easy_install-64FbG8/readline-6.2.2/egg-dist-tmp-NOmStB
clang: error: no such file or directory: 'readline/libreadline.a'
clang: error: no such file or directory: 'readline/libhistory.a'
error: Setup script exited with error: command '/usr/bin/clang' failed with exit status 1
Any ideas about how I could fix this ?
Thanks

There is a new solution to this problem in Pypi, pip install gnureadline.
https://pypi.python.org/pypi/gnureadline
The root issue is libedit (BSD-licensed) vs. Gnu Readline (GPL-licensed) . Apple would rather provide incompatible BSD code, than provide compatible code that has GPL restrictions.

This bug should be fixed in readline version 6.2.4 released last week.
Also note that you do not need to install the readline library itself via homebrew. It is already included within the python readline module.
Anyone having problems with the python-readline module is welcome to open an issue on the GitHub page of the module. This will ensure that the problem is permanently solved for everyone.

I had this same problem in OS X Lion 10.8, and fixed it by renaming my /Developer to /Developer-old. See this issue.

None of the above worked from me.
After uninstall ipython and readline, I ran the following that finally worked
easy_install http://pypi.python.org/packages/source/r/readline/readline-6.1.0.tar.gz
pip install ipython
And yes, readline 6.1.0 is an old one, but 6.2.x or other would not work (in sept 2013).

Try installing the binary egg directly:
$ easy_install http://pypi.python.org/packages/2.7/r/readline/readline-6.2.2-py2.7-macosx-10.7-intel.egg#md5=25383d860632d4a1521961ba68a52fe2

Make sure you have gcc installed.
which gcc
should return
/usr/bin/gcc
I was getting the same error when trying to easy_install readline. It wasn't until I downloaded the tar and tried to manually build it that I noticed it said
checking whether make sets $(MAKE)... no
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/Users/roneill/readline-6.2.4.1/rl/readline-lib':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
that I realized what the actual problem was. I had not used this particular laptop in a while and had not used Xcode to install the command line tools. Once I did, things worked properly.

What is the best way to setup Django on os X 10.7 Lion?

I am setting up Python and Django on os X 10.7 from a virgin install and Xcode 4.3.
I tried using the default install of Python:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/
I normally use a Python based package manager called easy_install.
Easy_install seems to not be able to find the compiler.
EDIT: When I tried to install MySQL-python I got this error:
$ sudo easy_install MySQL-python
Password:
Searching for MySQL-python
Reading http://pypi.python.org/simple/MySQL-python/
Reading http://sourceforge.net/projects/mysql-python/
Reading http://sourceforge.net/projects/mysql-python
Best match: MySQL-python 1.2.3
Downloading http://download.sourceforge.net/sourceforge/mysql-python/MySQL-python-1.2.3.tar.gz
Processing MySQL-python-1.2.3.tar.gz
Running MySQL-python-1.2.3/setup.py -q bdist_egg --dist-dir /tmp/easy_install-P9H9WX/MySQL-python-1.2.3/egg-dist-tmp-rRTfZL
warning: no files found matching 'MANIFEST'
warning: no files found matching 'ChangeLog'
warning: no files found matching 'GPL'
unable to execute llvm-gcc-4.2: No such file or directory
error: Setup script exited with error: command 'llvm-gcc-4.2' failed with exit status 1
error: Setup script exited with error: command 'llvm-gcc-4.2' failed with exit status 1
Apparently, the system attempts to use the same compiler used to compile the installed Python framework.
For some reason Apple didn't include llvm-gcc-4.2.
Xcode 4.1 used GCC, but with Xcode 4.3 that seems to have changed.
From what I can gather, Apple wants to use Clang as the compiler vs GCC.
So I added to .bash_profile:
cc=clang
I decided I would just recompile Python with clang but first, I needed to install readline.
Fail:
Wed Feb 22 16:04:59 ~/Downloads/readline-6.2
$ ./configure
checking build system type... i386-apple-darwin11.3.0
checking host system type... i386-apple-darwin11.3.0
Beginning configuration for readline-6.2 for i386-apple-darwin11.3.0
checking whether make sets $(MAKE)... no
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/Users/Bryan/Downloads/readline-6.2':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
What the easiest way to install Django on Lion 10.7?

Did you install the command-line tools with Xcode 4.3? They are not installed by default. You can install them by going to the Downloads pane in Xcode 4.3's preferences.

Making it way too hard:
First, make sure you install Xcode (available for free in the Mac App Store). It includes all the build tools that might be necessary to compile certain Python packages.
To get easy_install just download setuptools and follow the instructions for installing on Mac OS X at that link.
Once that's done, you can easy_install virtualenv to get a nice segregated environment to work in.

For the MySQL issue you have to edit the site.cfgfile:
mysql_config = /usr/local/mysql/bin/mysql_config
And then:
$ python setup.py build
$ sudo python setup.py install

Try updating XCode and reinstall all global site-packages. You may also want to try pip instead of easy_install.
You can also try to compile with
export ARCHFLAGS='-arch i386 -arch x86_64'
This solved many of my problems in the past when upgrading OSX versions.

Switching gcc version on mac

I have the newest XCode (4D199) installed and in terminal when I type
new-host-2: me$ gcc -version
i686-apple-darwin11-llvm-gcc-4.2: no input files
Is that the default xcode/mac gcc compiler version? Because when I try to do a
sudo easy_install cython
I get:
Running Cython-0.15.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-qS3Kqb/Cython-0.15.1/egg-dist-tmp-Zh0Vnv
cc1: error: unrecognized command line option "-arch"
cc1: error: unrecognized command line option "-arch"
I've read that -arch is a Apple GCC compiler only function. I think when I installed a port from macports I remember it installing something called "llvm" and now I suspect that that is being used instead of the one that comes with XCODE.
Any way to switch it back?
Oh, and when I type "sudo port select gcc" I get (this might be relevent to knowing which gcc version I have):
Available versions for gcc:
apple-gcc42
gcc42
llvm-gcc42
mp-gcc44
mp-llvm-gcc42
none

Does sound like you're getting a non-apple version. If you don't need any non-standard compilers, I'd remove any that macports has installed. The apple infrastructure is different enough that using compilers from macports causes grief fairly easily.

This is not extremely related to your problem but you will find a solution here: Can't install Ruby under Lion with RVM – GCC issues
This answer was edited multiple times and now contains three alternative solutions. Skip to the end and try the simple “edit 3” solution first, it seems to work for most people.
You need a non-LLVM version of GCC, which is no longer included with XCode 4.2. Install it yourself (or downgrade to XCode 4.1 temporarily), then do CC=/usr/local/bin/gcc-4.2 rvm install 1.9.3 (substituting the path to your non-LLVM gcc).
Edit: https://github.com/kennethreitz/osx-gcc-installer/downloads may help for installing GCC.
Edit 2 (apparently the easiest solution): Alternatively you can try to add --with-gcc=clang to the arguments to configure for Ruby to use clang.
Edit 3: rvm install 1.9.3 --with-gcc=clang does that for you.

Python: Unable to easy_install (Windows 7 x64)

I'm running python 2.7 on Windows 7 x64, and trying to easy_install pysqlite.
With command: easy_install -U pysqlite
It exits with the error:
error: Setup script exited with error: Unable to find vcvarsall.bat
This site: http://code.google.com/p/rdflib/issues/detail?id=104#c4
suggests a workaround of installing MingGW, saying to check the g++ option on install (plus some other stuff).
Unfortunately, MingGW does not give me the option to install g++, only c++, and of course on running easy_install a second time, I get ".. command 'gcc' failed: No such file or directory". So now I am el stucko.
Any advice on how to fix this problem would be great!

Even if you install a compiler (MinGW or Visual Studio), you still have to install SQLite3 development libraries. It is a pain to build things on Windows, so I suggest that you get the unofficial pre-built Windows binaries and install it.
As an aside, you should probably consider switching to ActivePython as it includes a package manager that allows you to install pre-built modules from ActiveState's repository.
As for the particular error in question, that is a distutils bug and you should raise your concerns in the Python bug tracker.

When that says "g++ compiler" they really mean the C++ compiler, which for mingw is gcc.

You need to install the Microsoft Visual C compiler thingy (the 2010 one). And use that as your compiler for all modules. You can also mess with distuls.cfg and specify a compiler that way.