Error when installing the Python version

[Padoup-Padoup]

Hello,

I successfully downloaded and compiled rwt for Python (v2.7). I first had to install swig:

sudo apt-get install swig 

(maybe this could be added as a requirement in the INSTALL file)

Then, the compilation ran smoothly (I think, I am not very familiar with CMake):

$ cmake .
-- The C compiler identification is GNU 4.7.2
-- The CXX compiler identification is GNU 4.7.2
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Found SWIG: /usr/bin/swig2.0 (found version "2.0.7") 
-- Found PythonLibs: /usr/lib/libpython3.2mu.so (found version "3.2.3") 
python: /usr/bin/python
numpy : /usr/local/lib/python2.7/dist-packages/numpy-1.11.0rc1-py2.7-linux-x86_64.egg/numpy/core/include
-- Configuring done
-- Generating done
-- Build files have been written to: /home/maxime/code/rwt/python

However, when running sudo make install, I get the following error:

$ sudo make install
[ 12%] Swig source
/home/maxime/code/rwt/python/rwt.i:3: Error: Syntax error in input(1).
make[2]: *** [rwtPYTHON_wrap.cxx] Erreur 1
make[1]: *** [CMakeFiles/_rwt.dir/all] Erreur 2
make: *** [all] Erreur 2

I wonder whether this can be related with conflicting versions of Python, but I am unable to troubleshoot this. I'd be happy to provide any version information/log.

Thank you

[kalliste]

It looks like you are on Linux - what distribution are you running?

On Wed, May 11, 2016 at 5:28 AM, Padoup-Padoup notifications@github.com wrote:

Hello,

I successfully downloaded and compiled rwt for Python (v2.7). I first had to install swig:

sudo apt-get install swig

(maybe this could be added as a requirement in the INSTALL file)

Then, the compilation ran smoothly (I think, I am not very familiar with CMake):

$ cmake . -- The C compiler identification is GNU 4.7.2 -- The CXX compiler identification is GNU 4.7.2 -- Check for working C compiler: /usr/bin/gcc -- Check for working C compiler: /usr/bin/gcc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Found SWIG: /usr/bin/swig2.0 (found version "2.0.7") -- Found PythonLibs: /usr/lib/libpython3.2mu.so (found version "3.2.3") python: /usr/bin/python numpy : /usr/local/lib/python2.7/dist-packages/numpy-1.11.0rc1-py2.7-linux-x86_64.egg/numpy/core/include -- Configuring done -- Generating done -- Build files have been written to: /home/maxime/code/rwt/python

However, when running sudo make install, I get the following error:

$ sudo make install [ 12%] Swig source /home/maxime/code/rwt/python/rwt.i:3: Error: Syntax error in input(1). make[2]: * [rwtPYTHON_wrap.cxx] Erreur 1 make[1]: * [CMakeFiles/_rwt.dir/all] Erreur 2 make: *\ [all] Erreur 2

I wonder whether this can be related with conflicting versions of Python, but I am unable to troubleshoot this. I'd be happy to provide any version information/log.

Thank you

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[Padoup-Padoup]

Thank you for your reply. I'm using Debian 7 (Wheezy), which is Debian oldstable:

$ uname -a
Linux *** 3.2.0-4-amd64 #1 SMP Debian 3.2.78-1 x86_64 GNU/Linux

Here /usr/bin/python points to python2.7. Thus, I am a little bit surprised to see that it links to /usr/lib/libpython3.2mu.so (shouldn't it be to /usr/lib/libpython2.7.so.1)?

[kalliste]

You'll need at least version 2.0.11 of SWIG, and I've documented that now.

I was able to backport SWIG 2.0.12 from Jessie to Wheezy and then rwt compiled and installed properly. https://packages.debian.org/source/jessie/swig2.0 https://wiki.debian.org/SimpleBackportCreation

I did not have any further problems with this on a fresh Wheezy install with pyhon 2.7 so if you have problems with the python 3 libraries you may need to remove them.

[Padoup-Padoup]

Thanks a lot, it works (I indeed had to remove the Python3 librairies during the compilation). An alternative could be to specify the PYTHON_LIBRARY path (as described in http://stackoverflow.com/questions/7660001/cmake-finds-wrong-python-libs#9810796 ), but I haven't tested.