I can't install Gevent

Question

I need to install Gevent for python2.7 but after try almost all I still doesn't install it.
I have python 2.6.6 and here all work ok... but I need python2.7+ then I install python 2.7.9 and now have only problems... Before some part of my project work in python 2.6 ok, but now my project doesn't run witn 2.6 and 2.7, dunno why it's stop working with 2.6 but nvm I need it with 2.7 but.... I cant instal gevent, I have installed libevent-devel an greenlet but I can't instal gevent

# pip2.7 install gevent
Collecting gevent
  Using cached gevent-1.0.1.tar.gz
Requirement already satisfied (use --upgrade to upgrade): greenlet in /usr/local/lib/python2.7/site-packages (from gevent)
Installing collected packages: gevent
  Running setup.py install for gevent
    configure: error: in `/tmp/pip-build-fpnLvN/gevent/build/temp.linux-x86_64-2.7/libev':
    configure: error: cannot run C compiled programs.
    If you meant to cross compile, use `--host'.
    See `config.log' for more details
    Running '/bin/sh /tmp/pip-build-fpnLvN/gevent/libev/configure > configure-output.txt' in /tmp/pip-build-fpnLvN/gevent/build/temp.linux-x86_64-2.7/libev
    building 'gevent.core' extension
    ccache gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -DLIBEV_EMBED=1 -DEV_COMMON= -DEV_CLEANUP_ENABLE=0 -DEV_EMBED_ENABLE=0 -DEV_PERIODIC_ENABLE=0 -Ibuild/temp.linux-x86_64-2.7/libev -Ilibev -I/usr/local/include/python2.7 -c gevent/gevent.core.c -o build/temp.linux-x86_64-2.7/gevent/gevent.core.o
    In file included from gevent/libev.h:2,
                     from gevent/gevent.core.c:313:
    libev/ev.c:45:22: error: config.h: No such file or directory
    libev/ev.c:477:48: warning: "/*" within comment
    In file included from gevent/libev.h:2,
                     from gevent/gevent.core.c:313:
    libev/ev.c:1531: warning: ‘ev_default_loop_ptr’ initialized and declared ‘extern’
    In file included from gevent/libev.h:2,
                     from gevent/gevent.core.c:313:
    libev/ev.c: In function ‘ev_io_start’:
    libev/ev.c:3554: warning: suggest parentheses around arithmetic in operand of ‘|’
    libev/ev.c:4795:27: warning: "/*" within comment
    libev/ev.c:4796:27: warning: "/*" within comment
    error: command 'ccache' failed with exit status 1
    Complete output from command /usr/local/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-build-fpnLvN/gevent/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-Ruy7Xb-record/install-record.txt --single-version-externally-managed --compile:
    running install

    running build

    running build_py

    creating build

    creating build/lib.linux-x86_64-2.7

    creating build/lib.linux-x86_64-2.7/gevent

    copying gevent/resolver_thread.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/socket.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/threadpool.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/util.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/__init__.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/monkey.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/queue.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/coros.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/server.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/_threading.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/thread.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/select.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/hub.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/fileobject.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/wsgi.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/pywsgi.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/event.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/greenlet.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/ssl.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/local.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/subprocess.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/threading.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/os.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/win32util.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/baseserver.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/lock.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/backdoor.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/pool.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/resolver_ares.py -> build/lib.linux-x86_64-2.7/gevent

    copying gevent/timeout.py -> build/lib.linux-x86_64-2.7/gevent

    running build_ext

    configure: error: in `/tmp/pip-build-fpnLvN/gevent/build/temp.linux-x86_64-2.7/libev':

    configure: error: cannot run C compiled programs.

    If you meant to cross compile, use `--host'.

    See `config.log' for more details

    Running '/bin/sh /tmp/pip-build-fpnLvN/gevent/libev/configure > configure-output.txt' in /tmp/pip-build-fpnLvN/gevent/build/temp.linux-x86_64-2.7/libev

    building 'gevent.core' extension

    creating build/temp.linux-x86_64-2.7/gevent

    ccache gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -DLIBEV_EMBED=1 -DEV_COMMON= -DEV_CLEANUP_ENABLE=0 -DEV_EMBED_ENABLE=0 -DEV_PERIODIC_ENABLE=0 -Ibuild/temp.linux-x86_64-2.7/libev -Ilibev -I/usr/local/include/python2.7 -c gevent/gevent.core.c -o build/temp.linux-x86_64-2.7/gevent/gevent.core.o

    In file included from gevent/libev.h:2,

                     from gevent/gevent.core.c:313:

    libev/ev.c:45:22: error: config.h: No such file or directory

    libev/ev.c:477:48: warning: "/*" within comment

    In file included from gevent/libev.h:2,

                     from gevent/gevent.core.c:313:

    libev/ev.c:1531: warning: ‘ev_default_loop_ptr’ initialized and declared ‘extern’

    In file included from gevent/libev.h:2,

                     from gevent/gevent.core.c:313:

    libev/ev.c: In function ‘ev_io_start’:

    libev/ev.c:3554: warning: suggest parentheses around arithmetic in operand of ‘|’

    libev/ev.c:4795:27: warning: "/*" within comment

    libev/ev.c:4796:27: warning: "/*" within comment

    error: command 'ccache' failed with exit status 1

    ----------------------------------------
    Command "/usr/local/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-build-fpnLvN/gevent/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-Ruy7Xb-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-fpnLvN/gevent

Answer 1

Had a similar issue, upgrading pip with

pip install --upgrade pip

worked for me. Make sure you have the latest version. In my case, I assumed making a new virtual environment automatically provides the latest version but I was wrong.