问题
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('\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...
回答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.
回答2:
Install CLI development toolchain with
$ xcode-select --install
If you have a broken pkg-config, unlink it with following command as mentioned in comments.
$ brew unlink pkg-config
Install libffi package
$ brew install pkg-config libffi
and then install cffi
$ pip install cffi
Source: Error installing bcrypt with pip on OS X: can't find ffi.h (libffi is installed)
回答3:
Running the below command in terminal took care of my issue.
xcode-select --install
来源：https://stackoverflow.com/questions/27740044/pip-cffi-package-installation-failed-on-osx