dlopen() failed to load a library: cairo / cairo-2

Question

This is my view:

from django.conf import settings
from django.http import HttpResponse
from django.template.loader import render_to_string
import weasyprint
         


        

Answer 1

I also had the same issue on a fresh installation of weasyprint on OSX EL CAPITAN. This is how I solved it.

Firstly, cairo was not found by when installed via pip, so I tried installing it via homebrew using the following command

brew install cairo pango gdk-pixbuf libxml2 libxslt libffi

Once this is done, I tried to find out the path of cairo installation. For my case, the location was /usr/local/homebrew/Cellar/cairo/1.14.6_1/lib/ I just exported this to my DYLD library path

export DYLD_LIBRARY_PATH=/usr/local/homebrew/Cellar/cairo/1.14.6_1/lib/

Then I uninstalled and installed weasyprint again

pip uninstall weasyprint
pip install weasyprint

Post that, I tried to run weasyprint, but got a new error

Traceback (most recent call last):
File "/Users/anurag/VirtualEnvs/test/bin/weasyprint", line 11, in 
 load_entry_point('WeasyPrint==0.31', 'console_scripts', 'weasyprint')()
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/pkg_resources/__init__.py", line 565, in load_entry_point
 return get_distribution(dist).load_entry_point(group, name)
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2598, in load_entry_point
 return ep.load()
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2258, in load
 return self.resolve()
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2264, in resolve
 module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/weasyprint/__init__.py", line 338, in 
 from .css import PARSER, preprocess_stylesheet  # noqa
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/weasyprint/css/__init__.py", line 30, in 
 from . import computed_values
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/weasyprint/css/computed_values.py", line 18, in 
 from .. import text
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/weasyprint/text.py", line 216, in 
 'libgobject-2.0.dylib')
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/weasyprint/text.py", line 212, in dlopen
 return ffi.dlopen(names[0])  # pragma: no cover
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/cffi/api.py", line 139, in dlopen
 lib, function_cache = _make_ffi_library(self, name, flags)
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/cffi/api.py", line 770, in _make_ffi_library
 backendlib = _load_backend_lib(backend, libname, flags)
File "/Users/anurag/VirtualEnvs/test/lib/python2.7/site-packages/cffi/api.py", line 759, in _load_backend_lib
 return backend.load_library(name, flags)
OSError: cannot load library gobject-2.0: dlopen(gobject-2.0, 2): image not found

I tried to find out the location of object library. Found it in /opt/local/lib and set the fallback library path

export DYLD_FALLBACK_LIBRARY_PATH=/opt/local/lib

After that, I tried running weasyprint again, and it worked

(test)anurag-mac:~ anurag$ weasyprint --version
WeasyPrint version 0.31

I hope someone else also finds it useful.

UPDATE-1

Although the above method worked, MySQL python started giving errors because of this and culprit was defining a fallback library path. So I removed this line

export DYLD_FALLBACK_LIBRARY_PATH=/opt/local/lib

which gave me the gobject error again, then I tried finding the location of its installation and appended to the DYLD_LIBRARY_PATH

export DYLD_LIBRARY_PATH=/usr/local/homebrew/Cellar/cairo/1.14.6_1/lib/:/usr/local/homebrew/Cellar/glib/2.48.2/lib/

After doing that, I got a similar error for pango. After correcting all the errors, this is the final library path which worked

export DYLD_LIBRARY_PATH=/usr/local/homebrew/Cellar/cairo/1.14.6_1/lib/:/usr/local/homebrew/Cellar/glib/2.48.2/lib/:/usr/local/homebrew/Cellar/pango/1.40.3/lib/