这对我来说已经足够了:

sudo apt-get install build-essential

在我的情况下，pip无法安装库，我尝试了上面给出的解决方案，但没有一个有效，但下面的方法对我有效:

sudo apt upgrade gcc

下面的答案对我有用，你可以试试:

sudo apt-get install python3-lxml

$ sudo apt-get install gcc
$ sudo apt-get install python-dateutil python-docutils python-feedparser python-gdata python-jinja2 python-ldap python-libxslt1 python-lxml python-mako python-mock python-openid python-psycopg2 python-psutil python-pybabel python-pychart python-pydot python-pyparsing python-reportlab python-simplejson python-tz python-unittest2 python-vatnumber python-vobject python-webdav python-werkzeug python-xlwt python-yaml python-zsi

或者试试这个:

$ sudo apt-get install libxml2-dev libxslt1-dev

在ubuntu 14.04中:

sudo apt-file search ffi.h 

返回:

chipmunk-dev: /usr/include/chipmunk/chipmunk_ffi.h
ghc-doc: /usr/share/doc/ghc-doc/html/users_guide/ffi.html
jython-doc: /usr/share/doc/jython-doc/html/javadoc/org/python/modules/jffi/jffi.html
libffi-dev: /usr/include/x86_64-linux-gnu/ffi.h
libffi-dev: /usr/share/doc/libffi6/html/Using-libffi.html
libgirepository1.0-dev: /usr/include/gobject-introspection-1.0/girffi.h
libgirepository1.0-doc: /usr/share/gtk-doc/html/gi/gi-girffi.html
mlton-basis: /usr/lib/mlton/include/basis-ffi.h
pypy-doc: /usr/share/doc/pypy-doc/html/config/objspace.usemodules._ffi.html
pypy-doc: /usr/share/doc/pypy-doc/html/config/objspace.usemodules._rawffi.html
pypy-doc: /usr/share/doc/pypy-doc/html/rffi.html

我选择安装libffi-dev

sudo apt-get install libffi-dev

完美的工作

python3:

sudo apt-get install python3-dev \
     build-essential libssl-dev libffi-dev \
     libxml2-dev libxslt1-dev zlib1g-dev \
     python3-pip

Python2:

sudo apt-get install python2-dev  \
     build-essential libssl-dev libffi-dev \
     libxml2-dev libxslt1-dev zlib1g-dev \
     python2-pip