ImportError: DLL load failed about gpyfft HOT 15 OPEN

Hi Gregor Thanks for the answer. Actually, I also recompiled clFFT, so it is not a version problem. It may be related to FFTW, as I cannot manage to have cmake find the libraries: I set the env variable FFTW_ROOT, but I have the warning message CMake Warning (dev) at CMakeLists.txt:153 (find_package): Policy CMP0074 is not set: find_package uses <PackageName>_ROOT variables. Run "cmake --help-policy CMP0074" for policy details. Use the cmake_policy command to set the policy and suppress this warning. Environment variable FFTW_ROOT is set to: D:\Developpement\fftw-3.3.5-dll64 For compatibility, CMake is ignoring the variable. This warning is for project developers. Use -Wno-dev to suppress it.

Hi Gregor I tried DependencyWalker with FFT.dll, I got some errors, but apparently the same as when analyzing the original precompiled file from the clFFT web site. IMHO, the problem seems to be elsewhere. I can run the following code in python from ctypes import * libc = cdll.LoadLibrary('/Users/Yves/Anaconda3/Lib/site-packages/gpyfft/clFFT.dll') print(libc.clfftSetup) with no complain about the dll not being loaded. But if I try import gpyfft, I get File "C:\Users\Yves\Anaconda3\lib\site-packages\gpyfft\__init__.py", line 6, in <module> from .gpyfftlib import GpyFFT, GpyFFT_Error, Plan Could the problem be in gpyfftlib ? I do not know what kind of file it is. BTW, I ran cmake in a directory on a D: drive, not C:. Could this have had an influence? Best Yves Le 2020-01-20 19:41, Gregor Thalhammer a écrit :

Hi Gregor It seems that there may be a problem with MacOSX and Python 3.7. I can run with no error python setup.py build python setup.py install in terminals open from Enthought Canopy (that I want to deprecate), using python 3.5, and from Anaconda, using Python 3.7 In the first case, I can run successfully the simple_example.py file. In the site-packages/gpyfft-0.7.0-py3.5-macosx-10.6-x86_64.egg/gpyfft there is a file gpyfftlib.cpython-35m-darwin.so In the second case, python 3.7 crashes with the message : Segmentation fault: 11 In the site-packages/gpyfft-0.7.0-py3.7-macosx-10.9-x86_64.egg/gpyfft there is a file gpyfftlib.cpython-37m-darwin.so Have you any idea on where it comes from and how this could be fixed ? Thx Yves

Hi Gregor I confirm that the problem is related to using python 3.7 I created a new environment in Anaconda based on Python 3.5. I could build, install and run simple_example.py Yves

Hi Gregor It also succeeds with python 3.6. Yves

Hi Gregor This may help: conda-forge/python-feedstock#272 Yves

Thx for the reply. I downloaded a fresh gpyfft-master directory from GitHub, and python setup.py build and install. Unfortunately, it didn't fix the problem. Does swig version matters ? Yves

Hi Gregor Thank you for your file. I had the error: ImportError: dlopen(/Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.3-py3.7-macosx-10.9-x86_64.egg/gpyfft/gpyfftlib.cpython-37m-darwin.so, 2): Symbol not found: _clfftInitSetupData Referenced from: /Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.3-py3.7-macosx-10.9-x86_64.egg/gpyfft/gpyfftlib.cpython-37m-darwin.so Expected in: /usr/local/lib/libclFFT.2.dylib in /Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.3-py3.7-macosx-10.9-x86_64.egg/gpyfft/gpyfftlib.cpython-37m-darwin.so So I tried (once again !) to start from scratch. I uninstalled clfft (brew uninstall clfft), downloaded the cleft-master package from GitHub, then: cd /Users/yves/clFFT-master/ mkdir build cmake ../src cmake --build . --config Release And then in setup.py of gpyfft: elif 'Darwin' in system: CLFFT_DIR = r'/Users/yves/clFFT-master' CLFFT_LIB_DIR = r'/Users/yves/clFFT-master/build/library' CLFFT_INCL_DIRS = [os.path.join(CLFFT_DIR, 'src', 'include'), os.path.join(CLFFT_DIR, 'build', 'include'),] CL_INCL_DIRS = [] EXTRA_COMPILE_ARGS = ['-stdlib=libc++'] EXTRA_LINK_ARGS = ['-stdlib=libc++'] Then cd /Users/yves/clFFT-master/build/library ls -al total 1856 drwxr-xr-x 8 yves staff 256 5 fév 19:00 . drwxr-xr-x 15 yves staff 480 5 fév 18:59 .. drwxr-xr-x 5 yves staff 160 5 fév 18:59 CMakeFiles -rw-r--r-- 1 yves staff 20572 5 fév 18:59 Makefile -rw-r--r-- 1 yves staff 1826 5 fév 18:59 cmake_install.cmake -rwxr-xr-x 1 yves staff 920592 5 fév 19:00 libclFFT.2.14.0.dylib lrwxr-xr-x 1 yves staff 21 5 fév 19:00 libclFFT.2.dylib -> libclFFT.2.14.0.dylib lrwxr-xr-x 1 yves staff 16 5 fév 19:00 libclFFT.dylib -> libclFFT.2.dylib Then cd /Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.0-py3.7-macosx-10.9-x86_64.egg/gpyfft otool -L gpyfftlib.cpython-37m-darwin.so gpyfftlib.cpython-37m-darwin.so: libclFFT.2.dylib (compatibility version 2.0.0, current version 2.14.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.250.1) Then, trying to run the simple_example.py: ImportError: dlopen(/Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.0-py3.7-macosx-10.9-x86_64.egg/gpyfft/gpyfftlib.cpython-37m-darwin.so, 2): Library not loaded: libclFFT.2.dylib Referenced from: /Users/yves/opt/anaconda3/lib/python3.7/site-packages/gpyfft-0.7.0-py3.7-macosx-10.9-x86_64.egg/gpyfft/gpyfftlib.cpython-37m-darwin.so Reason: image not found Is there something else to do to install clFFT ? Should I do brew install clFFT again ??? Sorry for the questions, but I am clearly a user, and I hate having to compile all these things, with plenty of symlinks, caches, different ways of installing and messed up configurations… Windows binaries are so much better ( Yves

Hi Gregor Thank you very much for the explanation about properly installing clFFT. I was definitely lacking the right commands. However, I am back to the initial problem (seg fault), both with your wheel and with what I compile. I have set up an Anaconda environment with Python 3.6, and I think I will stick to that for now, unless you have other hints (strange that you do not encounter the same problems; maybe a package discrepancy in the virtual environment -cython?) Thanks for your patience. Yves