Instalation issue

[fmacicasan]

Hello,

I'm trying to install dynet on my local machine and I keep getting an error while importing dynet in python.

import dynet as dy
Traceback (most recent call last):
File "", line 1, in
File "dynet.py", line 17, in
from _dynet import *
ImportError: dlopen(./_dynet.so, 2): Library not loaded: @rpath/libdynet.dylib
Referenced from: /dynet-base/dynet/build/python/_dynet.so
Reason: image not found

I'm using:

• MBP w/ MacOS Sierra
• Eigen's default branch from bitbucket
• The latest dynet (w/ Today's commit that fixed TravisCI)
• boost 160
• python 2.7.10
• cmake 3.6.3
• make 3.81 (built for i386-apple-darwin11.3.0)

The make log also references that file
c++ -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -Wl,-F. build/temp.macosx-10.12-intel-2.7/dynet.o -L. -L/dynet-base/dynet/build/dynet/ -L/dynet-base/dynet/build/dynet/ -ldynet -o /dynet-base/dynet/build/python/_dynet.so ld: warning: ignoring file /dynet-base/dynet/build/dynet//libdynet.dylib, file was built for x86_64 which is not the architecture being linked (i386): /dynet-base/dynet/build/dynet//libdynet.dylib

Could you advise?

Thanks,
Florin.

[pmulcaire]

I had a similar issue: same ImportError, though the corresponding warning was different:

g++ -bundle -undefined dynamic_lookup -L/Users/gmulc/anaconda/lib -arch x86_64 -arch x86_64 build/temp.macosx-10.6-x86_64-2.7/dynet.o -L. -L/Users/gmulc/dynet-base/dynet/build/dynet/ -L/Users/gmulc/anaconda/lib -L/Users/gmulc/dynet-base/dynet/build/dynet/ -ldynet -o /Users/gmulc/dynet-base/dynet/build/python/_dynet.so
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9
ld: warning: object file (build/temp.macosx-10.6-x86_64-2.7/dynet.o) was built for newer OSX version (10.7) than being linked (10.6)

This seems to be because _dynet.so looks for libdynet.dylib at @rpath/libdynet.dylib which doesn't work unless /path/to/dynet/build/dynet is in @rpath. You can update it with install_name_tool -change @rpath/libdynet.dylib /path/to/dynet/build/dynet/libdynet.dylib _dynet.so (and then verify the change with otool -L _dynet.so).

Not sure why the shared library path is like that in the first place, but this could at least be a workaround. Hope it works for you!

EDIT: This stopped working later, when python/ipython try to use a version of the .so copied to cache. Setting export DYLD_LIBRARY_PATH=/path/to/dynet/build/dynet/:$DYLD_LIBRARY_PATH works, but still feels annoyingly fragile (also, anaconda ipython may not be able to use that variable unless up-to-date.)

[neubig]

@yoavg do you think we need to add instructions about export DYLD_LIBRARY_PATH=/path/to/dynet/build/dynet/:$DYLD_LIBRARY_PATH to the python doc?

[yoavg]

This is definitely an option. I guess the real solution is to figure out
how to fix this for all users without the need to specify the path (as it
works for me and many others now), but I think it is probably not worth the
effort. So I'd add something like: "on some systems, you need to specify..."

On Thu, Nov 17, 2016, 22:54 Graham Neubig notifications@github.com wrote:

@yoavg https://github.com/yoavg do you think we need to add
instructions about export
DYLD_LIBRARY_PATH=/path/to/dynet/build/dynet/:$DYLD_LIBRARY_PATH to the
python doc?

—
You are receiving this because you were mentioned.

Reply to this email directly, view it on GitHub
#146 (comment), or mute
the thread
https://github.com/notifications/unsubscribe-auth/AAcVtC4xhY2C3IHy0BbUmpXOQL8xCCuyks5q_L8FgaJpZM4KqoA5
.

[neubig]

This was probably fixed by this commit: aa03883

[pmulcaire]

aa03883 worked for me.

[fmacicasan]

I also updated to latest dynet and i managed to successfully build and import dynet in python.

Thanks!

[SimonOst]

Hi, the fix you proposed is unfortunately not working for me. I am using Mac OS X and get the following error when importing:

Traceback (most recent call last):
File "", line 1, in
File "build/bdist.macosx-10.12-intel/egg/dynet.py", line 17, in
File "build/bdist.macosx-10.12-intel/egg/_dynet.py", line 7, in
File "build/bdist.macosx-10.12-intel/egg/_dynet.py", line 6, in bootstrap
ImportError: dlopen(/Users/Simon/Library/Caches/Python-Eggs/dyNET-0.0.0-py2.7-macosx-10.12-intel.egg-tmp/_dynet.so, 2): Library not loaded: /tmp/pip-build-zTAokf/dynet/build/py2.7-64bit/dynet/libdynet.dylib
Referenced from: /Users/Simon/Library/Caches/Python-Eggs/dyNET-0.0.0-py2.7-macosx-10.12-intel.egg-tmp/_dynet.so
Reason: image not found

[luthfianto]

Me too, I installed from pip-github so I don't have my build folder anymore

$ python dynet-exp.py
Traceback (most recent call last):
  File "dynet-exp.py", line 20, in <module>
    import dynet as dy
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/dynet.py", line 13, in <module>
    from _dynet import *
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/_dynet.so, 2): Library not loaded: /private/var/folders/rk/5qqd_n954m5280w7k6sw0z040000gp/T/pip-build-Ke2xBw/dynet/build/py2.7-64bit/dynet/libdynet.dylib
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/_dynet.so
  Reason: image not found```

[HuitingLiu]

Me too, a student from 11747. try to run the example code but get the image error:

python bow.py 
Traceback (most recent call last):
  File "bow.py", line 4, in <module>
    import dynet as dy
  File "/Users/xxx/py2venv/lib/python2.7/site-packages/dynet.py", line 15, in <module>
    from _dynet import *
ImportError: dlopen(/Users/xxx/py2venv/lib/python2.7/site-packages/_dynet.so, 2): Library not loaded: /private/var/folders/d7/fmj8dbx96kl46nkg02c_c4_m0000gn/T/pip-build-9ycG9t/dynet/build/py2.7-64bit/dynet/libdynet.dylib
  Referenced from: /Users/xxx/py2venv/lib/python2.7/site-packages/_dynet.so
  Reason: image not found

[xunzhang]

I think exporting DYLD_LIBRARY_PATH should solve the problem. One thing Mac users need to pay attention to is Disable System Integrity Protection (rootless) before exporting this environment variable. To verify this, try env | grep DYLD_LIBRARY_PATH.

To turn it off, follow below steps:

1. Boot OS X into Recovery Mode(hold down Command + R keys simultaneously after you hear the startup chime)
2. When the OS X Utilities screen appears, Utilities->Terminal
3. Type csrutil disable; reboot into the terminal then hit return.