问题
I'm using Ubuntu 14.04. I was trying to install pyopenssl on my machine. However it always fail with this info. I searched it on the google but didn't find any solution:
gcc -pthread -shared /tmp/pip_build_pi314/cryptography/cryptography/hazmat/bindings/__pycache__/cryptography/hazmat/bindings/__pycache__/_Cryptography_cffi_79a5b0a3x3a8a382.o -L/home/pi314/anaconda/lib -lcrypto -lssl -lpython2.7 -o /tmp/pip_build_pi314/cryptography/cryptography/hazmat/bindings/__pycache__/_Cryptography_cffi_79a5b0a3x3a8a382.so
Traceback (most recent call last):
File "/tmp/pip_build_pi314/cryptography/setup.py", line 88, in finalize_options
self.distribution.ext_modules = get_ext_modules()
File "/tmp/pip_build_pi314/cryptography/setup.py", line 68, in get_ext_modules
OpenSSLBinding().ffi.verifier.get_extension(),
File "cryptography/hazmat/bindings/openssl/binding.py", line 89, in __init__
self._ensure_ffi_initialized()
File "cryptography/hazmat/bindings/openssl/binding.py", line 109, in _ensure_ffi_initialized
libraries=libraries,
File "cryptography/hazmat/bindings/utils.py", line 80, in build_ffi
extra_link_args=extra_link_args,
File "/tmp/pip_build_pi314/cryptography/cffi-0.8.6-py2.7-linux-x86_64.egg/cffi/api.py", line 340, in verify
lib = self.verifier.load_library()
File "/tmp/pip_build_pi314/cryptography/cffi-0.8.6-py2.7-linux-x86_64.egg/cffi/verifier.py", line 75, in load_library
return self._load_library()
File "/tmp/pip_build_pi314/cryptography/cffi-0.8.6-py2.7-linux-x86_64.egg/cffi/verifier.py", line 151, in _load_library
return self._vengine.load_library()
File "/tmp/pip_build_pi314/cryptography/cffi-0.8.6-py2.7-linux-x86_64.egg/cffi/vengine_cpy.py", line 149, in load_library
raise ffiplatform.VerificationError(error)
cffi.ffiplatform.VerificationError: importing '/tmp/pip_build_pi314/cryptography/cryptography/hazmat/bindings/__pycache__/_Cryptography_cffi_79a5b0a3x3a8a382.so': /tmp/pip_build_pi314/cryptography/cryptography/hazmat/bindings/__pycache__/_Cryptography_cff i_79a5b0a3x3a8a382.so: undefined symbol: EC_GFp_nistp224_method
回答1:
Since you are on Ubuntu, you need to install libssl-dev
sudo apt-get install libssl-dev
You also need libffi-devel and python-dev
sudo apt-get install libffi-dev python-dev
回答2:
You have to install the openssl-devel libs
yum install openssl-devel
See here as the reference.
来源：https://stackoverflow.com/questions/25093158/meet-cffi-ffiplatform-verificationerror-when-install-pyopenssl