How can I install the Python library 'gevent' on Mac OS X Lion

Python library gevent, version 0.13.6 (the current version on PyPI) will not pip install on OS X Lion, Python 2.7 (and probably others.) It works fine on Snow Leopard.

How can I get this library installed?

Bonus points if it can be done using pip install, rather than a manual or custom process, because then it will play nicely with automated builds.

Here is my pip install output:

pip install gevent
Downloading/unpacking gevent
  Running setup.py egg_info for package gevent

Requirement already satisfied (use --upgrade to upgrade): greenlet in ./tl_env/lib/python2.7/site-packages (from gevent)
Installing collected packages: gevent
  Running setup.py install for gevent
    building 'gevent.core' extension
    gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c gevent/core.c -o build/temp.macosx-10.6-intel-2.7/gevent/core.o
    In file included from gevent/core.c:225:
    gevent/libevent.h:9:19: error: event.h: No such file or directory
    gevent/libevent.h:38:20: error: evhttp.h: No such file or directory
    gevent/libevent.h:39:19: error: evdns.h: No such file or directory
    gevent/core.c:361: error: field ‘ev’ has incomplete type
    gevent/core.c:741: warning: parameter names (without types) in function declaration
    gevent/core.c: In function ‘__pyx_f_6gevent_4core___event_handler’:
    gevent/core.c:1619: error: ‘EV_READ’ undeclared (first use in this function)
    gevent/core.c:1619: error: (Each undeclared identifier is reported only once
    gevent/core.c:15376: warning: assignment makes pointer from integer without a cast
   [... about 1000 more lines of compiler errors...]
    gevent/core.c:15385: error: dereferencing pointer to incomplete type
    gevent/core.c: In function ‘__pyx_pf_6gevent_4core_4http___init__’:
    gevent/core.c:15559: warning: assignment makes pointer from integer without a cast
    gevent/core.c: At top level:
    gevent/core.c:21272: error: expected ‘)’ before ‘val’
    lipo: can't figure out the architecture type of: /var/folders/s5/t94kn0p10hdgxzx9_9sprpg40000gq/T//cczk54q7.out
    error: command 'gcc-4.2' failed with exit status 1
    Complete output from command /Users/jacob/code/toplevel/tl_env/bin/python -c "import setuptools;__file__='/Users/jacob/code/toplevel/tl_env/build/gevent/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /var/folders/s5/t94kn0p10hdgxzx9_9sprpg40000gq/T/pip-s2hPd3-record/install-record.txt --install-headers /Users/jacob/code/toplevel/tl_env/bin/../include/site/python2.7:
    running install

running build

running build_py

running build_ext

building 'gevent.core' extension

gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -g -O2 -DNDEBUG -g -O3 -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c gevent/core.c -o build/temp.macosx-10.6-intel-2.7/gevent/core.o

Dietrich Epp

Don't post the entire thing! That's too much! 90% of the time, the first error is enough...

gevent/libevent.h:9:19: error: event.h: No such file or directory

This means that the library which provides the event.h header is not installed. The library is called libevent (website).

In general, compilation errors like these are a flaw in the build scripts. The build script should give an error message that libevent is not installed, and it is a bug that it did not do so.

To get libevent from MacPorts and then manually tell compiler with CFLAGS environment variable where to find event.h and libevent while running pip.

sudo port install libevent
CFLAGS="-I /opt/local/include -L /opt/local/lib" pip install gevent

You can also use homebrew for installing libevent : brew install libevent
(from David Wolever's comment)

Legolas Bloom

CFLAGS='-std=c99' pip install gevent

See in: Can't install gevent OSX 10.11

on OS X 10.11, clang uses c11 as the default, so just turn it back to c99.

After a while, I realized that the paths for the CFLAGS variable mentioned above works when installing libevent from port, but not from brew. The following worked for me (on OSX Mavericks):

$ brew install libevent
$ export CFLAGS="-I /usr/local/Cellar/libevent/2.0.21/include -L /usr/local/Cellar/libevent/2.0.21/lib"
$ pip install gevent

sandman

This is the way I found the easiest:

install libevent using homebrew

$ brew install libevent

install gevent

$ pip install gevent

This was the only way I could get it to work.

Found this answer when looking for help installing on Snow Leopard, posting this in case someone else comes this way with the same problem.

I had libevent installed via macports.

export CFLAGS=-I/opt/local/include export LDFLAGS=-L/opt/local/lib sudo pip install gevent

I had libevent installed via brew and it failed too, what worked was similar to what Stephen done, but pointing to brew default install:

CFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib pip install gevent

In case you install all from sources and use csh the following works on mac os 10.9

download latest stable http://libevent.org/ libevent-2.0.21-stable
- ./configure
- make
- sudo make install
virtualenv env
source env/bin/activate.csh
setenv CFLAGS "-I /usr/local/include -L /usr/local/lib"
pip install gevent

I use virtualenv and virtualenv wrapper, and so I wanted this to be self contained. I got gevent working like so:

Assuming you have virtual env setup, then:

workon {my_virtual_env}

Then download libevent and install it against the virtualenv.

curl -L -O https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz

tar -xzf libevent-2.0.21-stable.tar.gz
cd libevent-2.0.21-stable
./configure --prefix="$VIRTUAL_ENV"
make && make install

I'm assuming you've got gcc 5+ installed (I use brew)

Hope this helps.

user200778

sudo pip install cython git+git://github.com/gevent/gevent.git#egg=gevent

sandip

I am using MacOs High Sierra (10.13.3) First I did : brew install libevent

I upgraded my pip version to pip-18.0. then tried installing again with following :-

pip install gevent

it worked.

来源：https://stackoverflow.com/questions/7630388/how-can-i-install-the-python-library-gevent-on-mac-os-x-lion

标签

python

macos

osx-lion

gevent