[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2746: failure to build on OpenBSD 5.6 (Kyle's buildslave) due to OpenSSL not having ALPN-related symbols

Tahoe-LAFS trac at tahoe-lafs.org
Wed Apr 6 02:07:11 UTC 2016 

#2746: failure to build on OpenBSD 5.6 (Kyle's buildslave) due to OpenSSL not
having ALPN-related symbols
---------------------------+---------------------------------------------
     Reporter:  daira      |      Owner:  daira
         Type:  defect     |     Status:  new
     Priority:  normal     |  Milestone:  undecided
    Component:  packaging  |    Version:  1.10.2
   Resolution:             |   Keywords:  build openssl packaging openbsd
Launchpad Bug:             |
---------------------------+---------------------------------------------

Comment (by crd):

 It does look to me like the version of `cryptography` in pypi is even
 compatible with the modern version of LibreSSL 2.3.2 in OpenBSD-5.9.

 Here's what I get when I tried to build tahoe-lafs-1.11.0 on OpenBSD-5.9
 using the usual virtualenv method:
 {{{
 n150:/home/crd:11$ virtualenv tahoe-lafs
 New python executable in tahoe-lafs/bin/python2.7
 Also creating executable in tahoe-lafs/bin/python
 Installing setuptools, pip, wheel...done.
 n150:/home/crd:12$ . tahoe-lafs/bin/activate
 (tahoe-lafs)n150:/home/crd:13$ pip install --user --find-links=https
 ://tahoe-lafs.org/deps tahoe-l>
 (tahoe-lafs)n150:/home/crd:13$ pip install --find-links=https://tahoe-
 lafs.org/deps tahoe-lafs    >
 (tahoe-lafs)n150:/home/crd:13$ pip install --find-links=https://tahoe-
 lafs.org/deps tahoe-lafs
 You are using pip version 7.0.3, however version 8.1.1 is available.
 You should consider upgrading via the 'pip install --upgrade pip' command.
 Collecting tahoe-lafs
 Requirement already satisfied (use --upgrade to upgrade): setuptools>=11.3
 in ./tahoe-lafs/lib/python2.7/site-packages (from tahoe-lafs)
 Collecting zope.interface!=3.6.3,!=3.6.4,>=3.6.0 (from tahoe-lafs)
 Collecting Nevow>=0.11.1 (from tahoe-lafs)
   Using cached Nevow-0.13.0-py2-none-any.whl
 Collecting pyasn1>=0.1.8 (from tahoe-lafs)
   Using cached pyasn1-0.1.9-py2.py3-none-any.whl
 Collecting foolscap>=0.10.1 (from tahoe-lafs)
   Using cached foolscap-0.11.0-py2-none-any.whl
 Collecting pycrypto!=2.2,!=2.4,>=2.1.0 (from tahoe-lafs)
 Collecting pyOpenSSL>=0.14 (from tahoe-lafs)
   Using cached pyOpenSSL-16.0.0-py2.py3-none-any.whl
 Collecting Twisted[tls]>=15.1.0 (from tahoe-lafs)
 Collecting characteristic>=14.0.0 (from tahoe-lafs)
   Using cached characteristic-14.3.0-py2.py3-none-any.whl
 Collecting zfec>=1.1.0 (from tahoe-lafs)
 Collecting pycryptopp>=0.6.0 (from tahoe-lafs)
 Collecting service-identity (from tahoe-lafs)
   Using cached service_identity-16.0.0-py2.py3-none-any.whl
 Collecting pyasn1-modules>=0.0.5 (from tahoe-lafs)
   Using cached pyasn1_modules-0.0.8-py2.py3-none-any.whl
 Collecting simplejson>=1.4 (from tahoe-lafs)
 Collecting cryptography>=1.3 (from pyOpenSSL>=0.14->tahoe-lafs)
   Using cached cryptography-1.3.1.tar.gz
 Collecting six>=1.5.2 (from pyOpenSSL>=0.14->tahoe-lafs)
   Using cached six-1.10.0-py2.py3-none-any.whl
 Collecting idna>=0.6 (from Twisted[tls]>=15.1.0->tahoe-lafs)
   Using cached idna-2.1-py2-none-any.whl
 Collecting pyutil>=1.3.19 (from zfec>=1.1.0->tahoe-lafs)
   Using cached https://tahoe-lafs.org/deps/pyutil-2.0.0-py2-none-any.whl
 Collecting attrs (from service-identity->tahoe-lafs)
   Using cached attrs-15.2.0-py2.py3-none-any.whl
 Collecting enum34 (from cryptography>=1.3->pyOpenSSL>=0.14->tahoe-lafs)
   Using cached https://tahoe-lafs.org/deps/enum34-1.1.2-cp27-none-any.whl
 Collecting ipaddress (from cryptography>=1.3->pyOpenSSL>=0.14->tahoe-lafs)
   Using cached ipaddress-1.0.16-py27-none-any.whl
 Collecting cffi>=1.4.1 (from cryptography>=1.3->pyOpenSSL>=0.14->tahoe-
 lafs)
 Collecting zbase32>=1.0 (from pyutil>=1.3.19->zfec>=1.1.0->tahoe-lafs)
   Using cached https://tahoe-lafs.org/deps/zbase32-1.1.5-py2-none-any.whl
 Collecting pycparser (from cffi>=1.4.1->cryptography>=1.3->pyOpenSSL>=0.14
 ->tahoe-lafs)
   Using cached https://tahoe-lafs.org/deps/pycparser-2.14-cp27-none-
 any.whl
 Building wheels for collected packages: cryptography
   Running setup.py bdist_wheel for cryptography
   Complete output from command /home/crd/tahoe-lafs/bin/python2.7 -c
 "import setuptools;__file__='/tmp/pip-build-
 M2hczj/cryptography/setup.py';exec(compile(open(__file__).read().replace('\r\n',
 '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmprebG9bpip-wheel-:
   _configtest.c:1: error: thread-local storage not supported for this
 target
   Note: will not use '__thread' in the C code
   The above error message can be safely ignored

   Installed /tmp/pip-build-
 M2hczj/cryptography/.eggs/cffi-1.5.2-py2.7-openbsd-5.9-amd64.egg
   Searching for pycparser
   Reading https://pypi.python.org/simple/pycparser/
   Best match: pycparser 2.14
   Downloading
 https://pypi.python.org/packages/source/p/pycparser/pycparser-2.14.tar.gz#md5=a2bc8d28c923b4fe2b2c3b4b51a4f935
   Processing pycparser-2.14.tar.gz
   Writing /tmp/easy_install-8rsSga/pycparser-2.14/setup.cfg
   Running pycparser-2.14/setup.py -q bdist_egg --dist-dir /tmp
 /easy_install-8rsSga/pycparser-2.14/egg-dist-tmp-JCVgOd
   warning: no previously-included files matching 'yacctab.*' found under
 directory 'tests'
   warning: no previously-included files matching 'lextab.*' found under
 directory 'tests'
   warning: no previously-included files matching 'yacctab.*' found under
 directory 'examples'
   warning: no previously-included files matching 'lextab.*' found under
 directory 'examples'
   zip_safe flag not set; analyzing archive contents...
   Moving pycparser-2.14-py2.7.egg to /tmp/pip-build-
 M2hczj/cryptography/.eggs

   Installed /tmp/pip-build-
 M2hczj/cryptography/.eggs/pycparser-2.14-py2.7.egg
   running bdist_wheel
   running build
   running build_py
   creating build
   creating build/lib.openbsd-5.9-amd64-2.7
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography
   copying src/cryptography/__about__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography
   copying src/cryptography/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography
   copying src/cryptography/exceptions.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography
   copying src/cryptography/fernet.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography
   copying src/cryptography/utils.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat
   copying src/cryptography/hazmat/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/base.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/extensions.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/general_name.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/name.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   copying src/cryptography/x509/oid.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/x509
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends
   copying src/cryptography/hazmat/backends/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends
   copying src/cryptography/hazmat/backends/interfaces.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends
   copying src/cryptography/hazmat/backends/multibackend.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings
   copying src/cryptography/hazmat/bindings/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings
   creating build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/cmac.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/constant_time.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/hashes.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/hmac.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/keywrap.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/padding.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   copying src/cryptography/hazmat/primitives/serialization.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   copying src/cryptography/hazmat/backends/commoncrypto/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   copying src/cryptography/hazmat/backends/commoncrypto/backend.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   copying src/cryptography/hazmat/backends/commoncrypto/ciphers.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   copying src/cryptography/hazmat/backends/commoncrypto/hashes.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   copying src/cryptography/hazmat/backends/commoncrypto/hmac.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/commoncrypto
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/backend.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/ciphers.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/cmac.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/decode_asn1.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/dsa.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/ec.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/encode_asn1.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/hashes.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/hmac.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/rsa.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/utils.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   copying src/cryptography/hazmat/backends/openssl/x509.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/backends/openssl
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/commoncrypto
   copying src/cryptography/hazmat/bindings/commoncrypto/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/commoncrypto
   copying src/cryptography/hazmat/bindings/commoncrypto/binding.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/commoncrypto
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/openssl
   copying src/cryptography/hazmat/bindings/openssl/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/openssl
   copying src/cryptography/hazmat/bindings/openssl/_conditional.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/openssl
   copying src/cryptography/hazmat/bindings/openssl/binding.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/bindings/openssl
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/dh.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/dsa.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/ec.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/padding.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/rsa.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   copying src/cryptography/hazmat/primitives/asymmetric/utils.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/asymmetric
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/ciphers
   copying src/cryptography/hazmat/primitives/ciphers/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/ciphers
   copying src/cryptography/hazmat/primitives/ciphers/algorithms.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/ciphers
   copying src/cryptography/hazmat/primitives/ciphers/base.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/ciphers
   copying src/cryptography/hazmat/primitives/ciphers/modes.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/ciphers
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/interfaces
   copying src/cryptography/hazmat/primitives/interfaces/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/interfaces
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   copying src/cryptography/hazmat/primitives/kdf/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   copying src/cryptography/hazmat/primitives/kdf/concatkdf.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   copying src/cryptography/hazmat/primitives/kdf/hkdf.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   copying src/cryptography/hazmat/primitives/kdf/pbkdf2.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   copying src/cryptography/hazmat/primitives/kdf/x963kdf.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/kdf
   creating
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/twofactor
   copying src/cryptography/hazmat/primitives/twofactor/__init__.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/twofactor
   copying src/cryptography/hazmat/primitives/twofactor/hotp.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/twofactor
   copying src/cryptography/hazmat/primitives/twofactor/totp.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/twofactor
   copying src/cryptography/hazmat/primitives/twofactor/utils.py ->
 build/lib.openbsd-5.9-amd64-2.7/cryptography/hazmat/primitives/twofactor
   running egg_info
   writing requirements to src/cryptography.egg-info/requires.txt
   writing src/cryptography.egg-info/PKG-INFO
   writing top-level names to src/cryptography.egg-info/top_level.txt
   writing dependency_links to src/cryptography.egg-
 info/dependency_links.txt
   writing entry points to src/cryptography.egg-info/entry_points.txt
   warning: manifest_maker: standard file '-c' not found

   reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
   reading manifest template 'MANIFEST.in'
   no previously-included directories found matching 'docs/_build'
   warning: no previously-included files matching '*' found under directory
 'vectors'
   writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
   running build_ext
   generating cffi module 'build/temp.openbsd-5.9-amd64-2.7/_padding.c'
   creating build/temp.openbsd-5.9-amd64-2.7
   generating cffi module
 'build/temp.openbsd-5.9-amd64-2.7/_constant_time.c'
   generating cffi module 'build/temp.openbsd-5.9-amd64-2.7/_openssl.c'
   building '_openssl' extension
   creating build/temp.openbsd-5.9-amd64-2.7/build
   creating
 build/temp.openbsd-5.9-amd64-2.7/build/temp.openbsd-5.9-amd64-2.7
   cc -pthread -fno-strict-aliasing -O2 -pipe -DNDEBUG -O2 -pipe -fPIC
 -fPIC -I/usr/local/include/python2.7 -c
 build/temp.openbsd-5.9-amd64-2.7/_openssl.c -o
 build/temp.openbsd-5.9-amd64-2.7/build/temp.openbsd-5.9-amd64-2.7/_openssl.o
   build/temp.openbsd-5.9-amd64-2.7/_openssl.c:423:27: error:
 openssl/e_os2.h: No such file or directory
   error: command 'cc' failed with exit status 1

   ----------------------------------------
   Failed building wheel for cryptography
 Failed to build cryptography
 Installing collected packages: zope.interface, idna, pyasn1, six, enum34,
 ipaddress, pycparser, cffi, cryptography, pyOpenSSL, pyasn1-modules,
 attrs, service-identity, Twisted, Nevow, foolscap, pycrypto,
 characteristic, zbase32, pyutil, zfec, pycryptopp, simplejson, tahoe-lafs
   Running setup.py install for cryptography
     Complete output from command /home/crd/tahoe-lafs/bin/python2.7 -c
 "import setuptools, tokenize;__file__='/tmp/pip-build-
 M2hczj/cryptography/setup.py';exec(compile(getattr(tokenize, 'open',
 open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install
 --record /tmp/pip-9gaYu8-record/install-record.txt --single-version-
 externally-managed --compile --install-headers /home/crd/tahoe-
 lafs/include/site/python2.7/cryptography:
     running install
     running build
     running build_py
     running egg_info
     writing requirements to src/cryptography.egg-info/requires.txt
     writing src/cryptography.egg-info/PKG-INFO
     writing top-level names to src/cryptography.egg-info/top_level.txt
     writing dependency_links to src/cryptography.egg-
 info/dependency_links.txt
     writing entry points to src/cryptography.egg-info/entry_points.txt
     warning: manifest_maker: standard file '-c' not found

     reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
     reading manifest template 'MANIFEST.in'
     no previously-included directories found matching 'docs/_build'
     warning: no previously-included files matching '*' found under
 directory 'vectors'
     writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
     running build_ext
     generating cffi module 'build/temp.openbsd-5.9-amd64-2.7/_padding.c'
     already up-to-date
     generating cffi module
 'build/temp.openbsd-5.9-amd64-2.7/_constant_time.c'
     already up-to-date
     generating cffi module 'build/temp.openbsd-5.9-amd64-2.7/_openssl.c'
     already up-to-date
     building '_openssl' extension
     cc -pthread -fno-strict-aliasing -O2 -pipe -DNDEBUG -O2 -pipe -fPIC
 -fPIC -I/usr/local/include/python2.7 -c
 build/temp.openbsd-5.9-amd64-2.7/_openssl.c -o
 build/temp.openbsd-5.9-amd64-2.7/build/temp.openbsd-5.9-amd64-2.7/_openssl.o
     build/temp.openbsd-5.9-amd64-2.7/_openssl.c:423:27: error:
 openssl/e_os2.h: No such file or directory
     error: command 'cc' failed with exit status 1

     ----------------------------------------
 Command "/home/crd/tahoe-lafs/bin/python2.7 -c "import setuptools,
 tokenize;__file__='/tmp/pip-build-
 M2hczj/cryptography/setup.py';exec(compile(getattr(tokenize, 'open',
 open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install
 --record /tmp/pip-9gaYu8-record/install-record.txt --single-version-
 externally-managed --compile --install-headers /home/crd/tahoe-
 lafs/include/site/python2.7/cryptography" failed with error code 1 in /tmp
 /pip-build-M2hczj/cryptography
 (tahoe-lafs)n150:/home/crd:14$
 }}}

 It's worth noting that `py-cryptography-1.2.1` from OpenBSD's binary
 packages '''does''' work because of the patches found in
 http://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/security/py-
 cryptography/patches/

 Perhaps these patches have not been accepted in the upstream `py-
 cryptography` project.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2746#comment:2>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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