instalação do pacote pip cffi falhou no osx

Estou instalando o pacote cffi para criptografia e instalação do Jasmin.

Eu fiz algumas pesquisas antes de postar a pergunta, então encontrei a seguinte opção, mas que parece não estar funcionando:

Sistema

Mac OSx 10.9.5

python2.7

Erro

c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found

#include <ffi.h>

         ^

1 warning and 1 error generated.

Por favor, me guie na questão seguinte.

obrigado

Comando

env DYLD_LIBRARY_PATH = / usr / local / opt / openssl / lib / ARCHFLAGS = "- Erro de Wno = erro de linha de comando não utilizada - argumento de erro grave no futuro" LDFLAGS = "- L / usr / local / opt / openssl / lib "CFLAGS =" - I / usr / local / opt / openssl / include "sudo -E pip install cffi

REGISTRO

bhushanvaiude$ env DYLD_LIBRARY_PATH=/usr/local/opt/openssl/lib/ ARCHFLAGS="-Wno-error=unused-command-line-argument-hard-error-in-future" LDFLAGS="-L/usr/local/opt/openssl/lib" CFLAGS="-I/usr/local/opt/openssl/include" sudo -E pip install cffi
Password:
Downloading/unpacking cffi
  Downloading cffi-0.8.6.tar.gz (196kB): 196kB downloaded
  Running setup.py egg_info for package cffi
    warning: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Wunknown-warning-option]
    1 warning generated.

Downloading/unpacking pycparser (from cffi)
  Downloading pycparser-2.10.tar.gz (206kB): 206kB downloaded
  Running setup.py egg_info for package pycparser

Installing collected packages: cffi, pycparser
  Running setup.py install for cffi
    warning: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Wunknown-warning-option]
    1 warning generated.
    building '_cffi_backend' extension
    cc -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -I/usr/local/opt/openssl/include -Qunused-arguments -pipe -Wno-error=unused-command-line-argument-hard-error-in-future -DUSE__THREAD -I@@HOMEBREW_CELLAR@@/libffi/3.0.13/lib/libffi-3.0.13/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c c/_cffi_backend.c -o build/temp.macosx-10.9-intel-2.7/c/_cffi_backend.o
    warning: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Wunknown-warning-option]
    c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found
    #include <ffi.h>
             ^
    1 warning and 1 error generated.
    error: command 'cc' failed with exit status 1
    Complete output from command /Users/****project path***/bin/python -c "import setuptools;__file__='/Users/****project path***/build/cffi/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/7w/8z_mn3g120n34bv0w780gnd00000gn/T/pip-e6d6Ay-record/install-record.txt --single-version-externally-managed --install-headers /Users/****project path***/include/site/python2.7:
    warning: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Wunknown-warning-option]

1 warning generated.

running install

running build

running build_py

creating build

creating build/lib.macosx-10.9-intel-2.7

creating build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/__init__.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/api.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/backend_ctypes.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/commontypes.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/cparser.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/ffiplatform.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/gc_weakref.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/lock.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/model.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/vengine_cpy.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/vengine_gen.py -> build/lib.macosx-10.9-intel-2.7/cffi

copying cffi/verifier.py -> build/lib.macosx-10.9-intel-2.7/cffi

running build_ext

building '_cffi_backend' extension

creating build/temp.macosx-10.9-intel-2.7

creating build/temp.macosx-10.9-intel-2.7/c

cc -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -I/usr/local/opt/openssl/include -Qunused-arguments -pipe -Wno-error=unused-command-line-argument-hard-error-in-future -DUSE__THREAD -I@@HOMEBREW_CELLAR@@/libffi/3.0.13/lib/libffi-3.0.13/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c c/_cffi_backend.c -o build/temp.macosx-10.9-intel-2.7/c/_cffi_backend.o

warning: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Wunknown-warning-option]

c/_cffi_backend.c:13:10: fatal error: 'ffi.h' file not found

#include <ffi.h>

         ^

1 warning and 1 error generated.

error: command 'cc' failed with exit status 1

----------------------------------------
Cleaning up...