Added Windows batch script and installation instructions

[opazSG]

The following SimPhoNy packages can be installed on Windows using the included MakeWin.bat script file:

• simphony-common
• simphony-nCAD
• nfluid

[kitchoi]

Thanks @opazSG I will test it later today when I can get a hold of a window machine.

[opazSG]

Sorry @kitchoi to make you work on Windows for a while... ;) Please let me know if you find any problems.

[kitchoi]

After manually downloading the numpy wheel and pip install it, I was able to install simphony and simphony-nfluid but not simphony-ncad because I do not have the ncad library required. Where can a user get the .dll ?

    g++: error: C:\NCad\libNCad.dll: No such file or directory
    error: command 'C:\\MinGW\\bin\\g++.exe' failed with exit status 1

    ----------------------------------------
Command "c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\
\users\\kit\\appdata\\local\\temp\\pip-build-w9a_zc\\simphony-ncad\\setup.py';ex
ec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'
), __file__, 'exec'))" install --record c:\users\kit\appdata\local\temp\pip-0zrr
qa-record\install-record.txt --single-version-externally-managed --compile" fail
ed with error code 1 in c:\users\kit\appdata\local\temp\pip-build-w9a_zc\simphon
y-ncad

[gromansg]

Kit,

nCAD.dll cannot be freely distributed. GitHub is an open source repository and GitHub SimPhoNy project is completely open and consequently nCAD cannot be distributed by this tool. Anyway, according to the Consortium Agreement you (Enthought) is authorized to use nCAD in the project framework. If you are interested, please send me an email (groman@sgenia.com) and I will indicate you the steps to get nCAD.dll

Thanks

Guillermo

Guillermo Román-Pérez

Jefe de Proyecto

Project Manager

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C/ Chile, 4 Edificio II – 2ª Pta

28230 – Las Rozas Madrid

Email: mailto:groman@sgenia.com groman@sgenia.com

Telephone: +34 916306388

Fax: +34 916306406

De: Kit Yan Choi [mailto:notifications@github.com] Enviado el: jueves, 03 de marzo de 2016 12:59 Para: simphony/simphony-framework Asunto: Re: [simphony-framework] Added Windows batch script and installation instructions (#67)

After manually downloading the numpy wheel and pip install it, I was able to install simphony and simphony-nfluid but not simphony-ncad because I do not have the ncad library required. Where can a user get the .dll ?

g++: error: C:\NCad\libNCad.dll: No such file or directory
error: command 'C:\\MinGW\\bin\\g++.exe' failed with exit status 1

----------------------------------------

Command "c:\python27\python.exe -u -c "import setuptools, tokenize;file='c:\ \users\kit\appdata\local\temp\pip-build-w9a_zc\simphony-ncad\setup.py';ex ec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n' ), file, 'exec'))" install --record c:\users\kit\appdata\local\temp\pip-0zrr qa-record\install-record.txt --single-version-externally-managed --compile" fail ed with error code 1 in c:\users\kit\appdata\local\temp\pip-build-w9a_zc\simphon y-ncad

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[itziakos]

To install numpy using pip on windows you need to have a compile enviroment for windows. To do things right you need the native visual studio compilers that python was build with (Please please please do not use msys dev or mingw). https://github.com/cython/cython/wiki/CythonExtensionsOnWindows

[itziakos]

It is also common to provide the whl files in a easily available link. One can add binary files to the github release tags. These files can be downloaded by an automated script. However, this is only a workaround and might not work on all windows setups. The best solution is to have the compilers setup

I would also not use gohlke binaries on an automated script without permission.

[opazSG]

OK, we could rely on the manual installation of numpy by the Windows user, as we are providing the user the necessary info at Step 6 of the notes.

I am happy to strip the numpy target that automates this step out of the MakeWin batch script if it is not helpful. Please let me know.

[kitchoi]

So the libNCad.dll requires mingw32 being the compiler. However, the user might want to use a different compiler for other python packages. Can the compiler be defined and applied in an isolated python environment?

[opazSG]

I guess the compiler can always be defined by the user, by editing the corresponding distutils.cfg file within such Python environment. Besides simphony-nCAD requiring of the libNCad.dll library to run, the full nCAD software needs Qt for Windows, which is provided precompiled with either MinGW or Visual Studio. The thing about MinGW is that it is an open-source alternative, therefore available to most users.

(Perhaps @SGGgarcia, who has more experience with MinGW than myself, can comment a bit more on its advantages).

[itziakos]

The thing about MinGW is that it is an open-source alternative, therefore available to most users.

The MSVC 2008 compiler used to build python 2.7 is also available for free (https://github.com/cython/cython/wiki/CythonExtensionsOnWindows#using-microsoft-visual-c-compiler-for-python-only-for-python-27x)

[SGGgarcia]

@kitchoi @itziakos Thanks for your comments, the thing with MinGW and MSVC is that nCad itself is compiled with MinGW and potentially it will be a big amount of work to compile it with MSVC at this point. For the moment we haven't found any failures or runtime problems with this, but I understand why it could be dangerous. Having said that, we didnt find any other solution than configuring the disutils.cfg file for using MingGW instead of MSVC.

[itziakos]

Thanks @SGGgarcia.

I understand that we cannot change the build strategy for nCad. We just need to make sure that the danger is documented and users are informed about it.

Having said that, we didnt find any other solution than configuring the disutils.cfg file for using MingGW instead of MSVC.

it is possible to define the compiler and other options to be used at the command line:

python setup.py build_ext --compiler=mingw32 
python setup.py install

The commands above (or something similar) will use mingw only for building the n-Fluid extension and does not change the global distutils.cfg.

[SGGgarcia]

@itziakos I see, that makes sense, I will try and let you know about the results

@itziakos update: I tried this and had no problems, so I will update the installation instructions, thanks again, that was useful