python - pip cffi package installation failed on osx

Question

I am installing cffi package for cryptography and Jasmin installation.

I did some research before posting question, so I found following option but which is seems not working:

System

Mac OSx 10.9.5

python2.7

Error

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

#include <ffi.h>

         ^

1 warning and 1 error generated.

Please guide me on following issue.

Thanks

Command

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

LOG

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('
', '
'), __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...

Answer 1

In your terminal try and run:

xcode-select --install

After that try installing the package again.

By default, XCode installs itself as the IDE and does not set up the environment for the use by command line tools; for example, the /usr/include folder will be missing.

Running the above command will install the tools necessary to run compilation from the command line and create the required symbolic links. Since Python packages compile native code parts using the command-line interface of XCode, this step is required to install Python packages that include native components.

You only need to do this once per XCode install/upgrade, or if you see a similar error.