Installation: fatal error: ffi.h: No such file or directory

[Eric K]

When installing Congress stand-alone, the following error occurs on executing

pip install -r requirements.txt

---------------
    creating build/temp.linux-x86_64-2.7/c
    x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -DUSE__THREAD -I/usr/include/ffi -I/usr/include/libffi -I/usr/include/python2.7 -c c/_cffi_backend.c -o build/temp.linux-x86_64-2.7/c/_cffi_backend.o
    c/_cffi_backend.c:13:17: fatal error: ffi.h: No such file or directory
     #include <ffi.h>
                     ^
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
---------------
Env Notes: Python 2.7.6; PIP: 7.1.2; Setuptools 18.3.2

[Eric K (ekcs)]

Amend the installation instructions to ask people to run the following before running pip install:

$ sudo apt-get install build-essential libssl-dev libffi-dev python-dev

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/liberty
Review: https://review.openstack.org/231313

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/231315

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/231313
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=8e8ffd0f1b5ea92a5b7e29d562e584ef639863fe
Submitter: Jenkins
Branch: stable/liberty

commit 8e8ffd0f1b5ea92a5b7e29d562e584ef639863fe
Author: Eric K <email address hidden>
Date: Mon Oct 5 22:12:36 2015 -0700

    Amended install instructions in README.rst

    Purpose: helps users avoid several installation errors
    Changes:
    - added instruction to install requirements using pip
    - added instruction to install required packages build-essential,
    libssl-dev, libffi-dev

    DocImpact
    Closes-Bug: #1503094
    Closes-Bug: #1503095

    Change-Id: I484eda2e16edb2039add38c92720eb15d9274fd1

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/231315
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=46ca40dc220549eb7ee742fe5a410694b082ce12
Submitter: Jenkins
Branch: master

commit 46ca40dc220549eb7ee742fe5a410694b082ce12
Author: Eric K <email address hidden>
Date: Mon Oct 5 22:41:05 2015 -0700

    Amended install instructions in README.rst

    Purpose: helps users avoid several installation errors
    Changes:
    - added instruction to install requirements using pip
    - added instruction to install required packages build-essential,
    libssl-dev, libffi-dev

    DocImpact
    Closes-Bug: #1503094
    Closes-Bug: #1503095

    Change-Id: Iebdb25f259095be6e7e237c8a683f657ffeab92a

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/congress 2.0.0 release.