M2Crypto doesn't install in venv, or swig doesn't define __x86_64__ which breaks compiling against OpenSSL

I'm trying to install the Python M2Crypto package into a virtualenv on an x86_64 RHEL 6.1 machine. This process invokes swig, which fails with the following error:

$ virtualenv -q --no-site-packages venv
$ pip install -E venv M2Crypto==0.20.2
Downloading/unpacking M2Crypto==0.20.2
  Downloading M2Crypto-0.20.2.tar.gz (412Kb): 412Kb  downloaded
  Running setup.py egg_info for package M2Crypto
Installing collected packages: M2Crypto
  Running setup.py install for M2Crypto
    building 'M2Crypto.__m2crypto' extension
    swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
    swig -python -I/usr/include/python2.6 -I/usr/include -includeall -o SWIG/_m2crypto_wrap.c S开发者_JAVA百科WIG/_m2crypto.i
    /usr/include/openssl/opensslconf.h:31: Error: CPP #error ""This openssl-devel package does not work your architecture?"". Use the -cpperraswarn option to continue swig processing.
    error: command 'swig' failed with exit status 1
    Complete output from command /home/lorin/venv/bin/python -c "import setuptools;__file__='/home/lorin/venv/build/M2Crypto/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-BFiNtU-record/install-record.txt --install-headers /home/lorin/venv/include/site/python2.6:

I've got OpenSSL 1.0.0 installed via RPM packages from RedHat.

The part of /usr/include/openssl/opensslconf.h that causes the error looks like this:

#if defined(__i386__)
#include "opensslconf-i386.h"
#elif defined(__ia64__)
#include "opensslconf-ia64.h"
#elif defined(__powerpc64__)
#include "opensslconf-ppc64.h"
#elif defined(__powerpc__)
#include "opensslconf-ppc.h"
#elif defined(__s390x__)
#include "opensslconf-s390x.h"
#elif defined(__s390__)
#include "opensslconf-s390.h"
#elif defined(__sparc__) && defined(__arch64__)
#include "opensslconf-sparc64.h"
#elif defined(__sparc__)
#include "opensslconf-sparc.h"
#elif defined(__x86_64__)
#include "opensslconf-x86_64.h"
#else
#error "This openssl-devel package does not work your architecture?"
#endif

gcc has the right variable defined:

$ echo | gcc -E -dM - | grep x86_64
#define __x86_64 1
#define __x86_64__ 1

But apparenty swig doesn't, since this is the line that's failing:

swig -python -I/usr/include/python2.6 -I/usr/include -includeall -o \
  SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i

Is there a way to fix this by changing something in my system configuration? M2Crypto gets installed in a virtualenv as part of a larger script I don't control, so avoiding mucking around with the M2Crypto files would be a good thing.

---

M2Crypto supplies a fedora_setup.sh script to handle the problems with Fedora/RL/CentOs releases, but pip, of course, doesn't know anything about it.

After the pip install fails, it leaves the downloaded stuff in the venv/build/M2Crypto directory. do this:

cd <path-to-your-venv>/venv/build/M2Crypto
chmod u+x fedora_setup.sh
./fedora_setup.sh build
./fedora_setup.sh install

This has worked in my install process

---

You just don't have swig installed.

Try:

sudo yum install swig

And then:

sudo easy_install M2crypto

---

I did this and it works very well :

env SWIG_FEATURES="-cpperraswarn -includeall -I/usr/include/openssl" pip install M2Crypto

Of course you have to install swigg with sudo yum install swig before

---

If you are seeing this and are on Ubuntu, use apt-get instead of pip to avoid this issue.
apt-get install python-m2crypto

---

I had a similar issue where /usr/include/openssl was missing opensslconf.h (source https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=733644#10)

sudo ln -s /usr/include/x86_64-linux-gnu/openssl/opensslconf.h /usr/include/openssl

---

There's a repository where "pip install" works:

https://github.com/martinpaljak/M2Crypto

---

sudo yum install m2crypto

worked for me to get around this problem.

---

I found a new way to fix this problem in centos5.8, try it.

vim setup.py

def finalize_options(self):
  ...
  self.swig_opts.append('-includeall') # after this line
  self.swig_opts.append('-I/usr/include/openssl') # add here

then python setup.py install will work.

---

On FreeBSD I had to install Swig (the obvious part) as well (by sudo pkg install swig), but Swig 2.0 executable was named swig2.0 and handle swig resulted in command not found. Solution: symlink Swig 2.0 to handle swig:

ln -s /usr/local/bin/swig2.0 /usr/local/bin/swig

---

It seems like not having swig is the problem, as @LeoC said.

For those on MacOS, I'd recommend downloading swig via a package manager like homebrew because it's cleaner.

I.e. you'd run

brew install swig