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Trouble downloading mlpy for Python ERROR: 'gsl/gsl_sf.h' file not found

I am trying to download mlpy using the instructions from the website, however I keep encoutnering the error of 'gsl/gsl_sf.h' file not found. The following code is generated, any help will be appreciated:
$ python setup.py install
running install
running build
running build_py
running build_ext
skipping 'mlpy/gsl/gsl.c' Cython extension (up-to-date)
building 'mlpy.gsl' extension
/usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/include -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c mlpy/gsl/gsl.c -o build/temp.macosx-10.6-intel-2.7/mlpy/gsl/gsl.o
mlpy/gsl/gsl.c:223:10: fatal error: 'gsl/gsl_sf.h' file not found
#include "gsl/gsl_sf.h"
^
1 error generated.
error: command '/usr/bin/clang' failed with exit status 1
The same error being generated when using the header line:
$ python setup.py build_ext --include-dirs=/path/to/header --rpath=/path/to/lib
running build_ext
skipping 'mlpy/gsl/gsl.c' Cython extension (up-to-date)
building 'mlpy.gsl' extension
/usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/include -I/path/to/header -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c mlpy/gsl/gsl.c -o build/temp.macosx-10.6-intel-2.7/mlpy/gsl/gsl.o
mlpy/gsl/gsl.c:223:10: fatal error: 'gsl/gsl_sf.h' file not found
#include "gsl/gsl_sf.h"
^
1 error generated.
error: command '/usr/bin/clang' failed with exit status 1
****EDIT****
Seems like there was an issue with Xcode, after updating Xcode mlpy was imported correctly

Error compiling pyGraphviz on Os X 10.9

Good day to everyone,
I've an error trying to compile and install Pygraphviz 1.2 in OS X 10.9
I've downloaded the pygraphviz archive from https://pypi.python.org/packages/source/p/pygraphviz/pygraphviz-1.2.zip#md5=90c728a8db276eede4e3af2f990a8985
From Terminal I've typed
sudo ./setup.py install
the output was:
Trying pkg-config
library_path=/usr/local/Cellar/graphviz/2.38.0/lib
include_path=/usr/local/Cellar/graphviz/2.38.0/include/graphviz
running install
running build
running build_py
running build_ext
building 'pygraphviz._graphviz' extension
cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -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 x86_64 -arch i386 -pipe -I/usr/local/Cellar/graphviz/2.38.0/include/graphviz -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c pygraphviz/graphviz_wrap.c -o build/temp.macosx-10.9-intel-2.7/pygraphviz/graphviz_wrap.o
clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
error: command 'cc' failed with exit status 1
As you can see I've already installed graphviz with Homebrew.

The error is in clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]
Solution from clang error: unknown argument: '-mno-fused-madd' (python package installation failure) is:
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments

Cannot install pycurl on Mac OS X - get errors 1 and 2

I am attempting to install pycurl-7.19.0 on my Mac OSX 10.8.4.
The error I get when compiling:
py setup.py install
The results:
Using curl-config (libcurl 7.24.0)
running install
running build
running build_py
running build_ext
building 'pycurl' extension
clang -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 -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -DHAVE_CURL_SSL=1 -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/pycurl.c -o build/temp.macosx-10.8-intel-2.7/src/pycurl.o
clang: warning: argument unused during compilation: '-mno-fused-madd'
In file included from src/pycurl.c:50:
In file included from /usr/local/include/curl/curl.h:35:
/usr/local/include/curl/curlrules.h:143:6: error: '__curl_rule_01__' declared as an array with a negative size
[CurlchkszEQ(long, CURL_SIZEOF_LONG)];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/curl/curlrules.h:132:27: note: expanded from macro 'CurlchkszEQ'
#define CurlchkszEQ(t, s) sizeof(t) == s ? 1 : -1
^~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/curl/curlrules.h:153:6: error: '__curl_rule_02__' declared as an array with a negative size
[CurlchkszEQ(curl_off_t, CURL_SIZEOF_CURL_OFF_T)];
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/curl/curlrules.h:132:27: note: expanded from macro 'CurlchkszEQ'
#define CurlchkszEQ(t, s) sizeof(t) == s ? 1 : -1
^~~~~~~~~~~~~~~~~~~~~~~
src/pycurl.c:85:4: warning: "libcurl was compiled with SSL support, but configure could not determine which " "library
was used; thus no SSL crypto locking callbacks will be set, which may " "cause random crashes on SSL requests"
[-W#warnings]
# warning \
^
1 warning and 2 errors generated.
error: command 'clang' failed with exit status 1
I currently have curl-7.32.0 installed and am running Python 2.7.2 and GCC 4.2.1.

This works for me on OSX 10.9
sudo env ARCHFLAGS="-arch x86_64" easy_install setuptools pycurl==7.19.0

Changing Python easy_install's default include path

Question about Python's setuptools. I just did a fresh install of Mac OS 10.8 and installed the official Python 2.7.3 package. When installing the binary module py-bcrypt (or any other binary module for that matter), I get the following error:
bcrypt/bcrypt_python.c:17:10: fatal error: 'Python.h' file not found
#include "Python.h"
^
1 error generated.
error: Setup script exited with error: command 'clang' failed with exit status 1
Running sudo easy_install --verbose py-bcrypt shows the following call to CLang:
clang -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 -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c bcrypt/bcrypt_python.c -o build/temp.macosx-10.8-intel-2.7/bcrypt/bcrypt_python.o
...which is fine except for this part:
-I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7
Because Python.h is actually stored in the non-System Library here: /Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/Python.h
So to finally get to the point: How do you change the default include path used by setuptools?

In Ubuntu, doing this in .bashrc or .zshrc would solve the issue:
export C_INCLUDE_PATH=/you_name_it/include/python2.7
export CPLUS_INCLUDE_PATH=/you_name_it/include/python2.7
It enabled gcc to find other headers you need, but I'm not sure whether it works for clang.

I still have no idea how to actually do this, but I found a workaround. Installing XCode's Command Line Tools (Preferences -> Download -> Command Line Tools) put Python headers in the right place.

How do I install libspotify on Mac OSX Lion?

I'am trying to install libspotify on Mac OSX Lion. I want to use spotify api in a Python script. When I try installing pyspotify, it says:
running install
running bdist_egg
running egg_info
writing pyspotify.egg-info/PKG-INFO
writing top-level names to pyspotify.egg-info/top_level.txt
writing dependency_links to pyspotify.egg-info/dependency_links.txt
reading manifest file 'pyspotify.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'pyspotify.egg-info/SOURCES.txt'
installing library code to build/bdist.macosx-10.8-intel/egg
running install_lib
running build_py
running build_ext
building 'spotify._spotify' extension
clang -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 -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -Isrc -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/module.c -o build/temp.macosx-10.8-intel-2.7/src/module.o
clang: warning: argument unused during compilation: '-mno-fused-madd'
src/module.c:20:10: fatal error: 'spotify/api.h' file not found
#include "spotify/api.h"
^
1 error generated.
error: command 'clang' failed with exit status 1
I tried to install libspotify using brew...
brew install libspotify

Either you install it with brew, as you say, or just copy the libspotify.framework to /Library/Frameworks
Now you should be able to include the lib like:
#include <libspotify/api.h>