Installing M2Crypto on CentOS

Question

I am trying to install M2Crypto on CentOS by compiling from the source. i am doing a python setup.py build But I get the following error,

/usr/local/lib/python2.6/distutils/dist.py:266: UserWarning: Unknown distribution option: 'test_suite'
  warnings.warn(msg)
running build
running build_py
running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/local/include/python2.6 -I/usr/include -includeall -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
SWIG/_m2crypto.i:28: Error: Unable to find 'openssl/opensslv.h'
SWIG/_evp.i:9: Error: Unable to find 'openssl/opensslconf.h'
SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf.h'
error: command 'swig' failed with exit status 1

Please advise ...

Prasanna

Answer 1

I had this problem now (in 2018), I solved it by installing openssl-devel, gcc and make

yum install gcc gcc-c++ make openssl-devel

Answer 2

I just had this problem. In M2Crypto's INSTALL file:

Note about Fedora Core -based Distributions
----------------------------------------------------

Fedora Core (and RedHat, CentOS etc.) have made changes to OpenSSL
configuration compared to many other Linux distributions. If you can not
build M2Crypto normally, try the fedora_setup.sh script included with
M2Crypto sources.

My solution was to get the sources from PyPI or from the source. Then in the M2Crypto directory:

$ chmod +x fedora_setup.py
$ ./fedora_setup.py install

If you're using a virtualenv, change the path of the python interpreter in that file, or activate your environment before building.

The only dependency that I had that wasn't satisfied on my system was openssl-devel.

Answer 3

The following should work:

env SWIG_FEATURES="-cpperraswarn -includeall -D__`uname -m`__ -I/usr/include/openssl" python setup.py build

Edit: and openssl-devel package is of course also required.

Answer 4

Follow Brian's instruction, and make sure you have install openssl-devel. if you experience error like this:

./fedora_setup.sh build
running build
running build_py
running build_ext
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 SWIG/_m2crypto.i
SWIG/_evp.i:12: Error: Unable to find 'openssl/opensslconf-i686.h'
SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf-i686.h'
error: command 'swig' failed with exit status 1

You are running i386 operating system on 64 bit hardware. arch =´uname -m´ will yields i686. The easiest way is to work around this is to create a symbolic link.

sudo ln -s /usr/include/openssl/opensslconf-i386.h /usr/include/openssl/opensslconf-i686.h

Or if you experience errors like:

./fedora_setup.sh build
running build
running build_py
running build_ext
SWIG/_m2crypto_wrap.c:27555: error: ‘Swig_var__evp_err_set’ undeclared (first use in this function)
SWIG/_m2crypto_wrap.c:27564: error: ‘Swig_var__dh_err_get’ undeclared (first use in this function)
SWIG/_m2crypto_wrap.c:27564: error: ‘Swig_var__dh_err_set’ undeclared (first use in this function)
SWIG/_m2crypto_wrap.c:27576: error: ‘Swig_var__rsa_err_get’ undeclared (first use in this function)
...

Some headers are missing, just issue the following command and try again:

sudo yum install python-devel

Answer 5

Install openssl-devel.