Re: [Plplot-devel] Recent diff results for 32-bit Wine

[Alan W. I. <ir...@be...>]

On 2013-10-17 19:51-0000 Arjen Markus wrote:

> Hi Alan,
>
> I am trying to get the Python bindings and examples ready under Windows so that I
> can compare the output with the C examples. However, I am getting a set of weird error messages.
> (I am not quite sure I have all the build tools right - I had some problems the past week with the stuff
> installed on my laptop)
>
> Anyway here are the messages:
>
>
> Microsoft (R) Program Maintenance Utility Version 10.00.30319.01
> Copyright (C) Microsoft Corporation.  All rights reserved.
>
> [  0%] Built target csirocsa
> [  1%] Built target deltaT-gen
> [  1%] Built target tai-utc-gen
> [  1%] Built target tai-utc.h_built
> [  1%] Built target deltaT.h_built
> [  1%] Built target qsastime
> [  1%] Built target plhershey-unicode-gen
> [  2%] Built target plhershey-unicode.h_built
> [ 12%] Built target plplotd
> [ 13%] Built target plplotcxxd
> [ 13%] Building C object bindings/python/CMakeFiles/_plplotcmodule.dir/plplotcmodulePYTHON_wrap.c.obj
> plplotcmodulePYTHON_wrap.c
> D:\plplot-svn\build-windows-python\bindings\python\plplotcmodulePYTHON_wrap.c(3578) : error C2036: 'void *' : unknown size
[...]
> The PyArray_FLOAT symbol is part of Numpy pre-1.7 and it appears in plplotcmodule.i but I do not know how to repair this.
> I also do not know what the "void *" messages are all about.
>

Hi Arjen:

I believe you ran into Python trouble before when you were testing
te_gen for me with MinGW/MSYS.  I cannot recall whether that was
resolved or not.  Anyhow, I may be repeating what was discussed
then, but please bear with me as I go through absolutely
everything you should need.

>From the above results, I suspect you are pointing to an incorrect Python header version
so macros are not being defined properly ==> all kinds of compiler
errors.  Have you installed numpy to the correct location?

I just now created a successful Python-2.7.3 + numeric installation on
Wine.  Here is what I did from my notes.  Where appropriate drop the
wine command prefix to do the equivalent Microsoft windows command.

# Install python-2.7.3
wine msiexec /i python-2.7.3.msi

In the GUI I chose the installation directory to be

z:\home\wine\newstart\python\python-2.7.3

Everything else was default.

# Install numpy that is consistent with python-2.7.3

wine numpy-1.5.1-win32-superpack-python2.7.exe

The GUI found the above python-2.7.3 installation so I could choose
everything to be default for the installation.

Here is a quick check that all is well with that numpy installation:

Get into the python-2.7.3 command-line by simply executing
the python.exe command.  Then from that python prompt,
execute

import numpy
print numpy.get_include()

The results here under Wine are

Z:\home\wine\newstart\python\python-2.7.3\lib\site-packages\numpy\core\include

(This is the method used by our CMake build system to discover the
location of the numpy include files, see below for my results for that.)

Here is how I set up Python before I do anything else on the bash.exe
command line with MinGW/MSYS. 
You can just put these commands in a file which you run
from bash.exe by

source <filename>

(which is what I do) or you can enter these values by hand from the bash,exe command line.

# Directory where python.exe can be found.  Tailor this to the right
# location on your system (see above how that install prefix is
determined when you install python).
PYTHON_PATH=/z/home/wine/newstart/python/python-2.7.3

# Once the above line is tailored correctly, the rest follows automatically

# Put Python on the PATH
PATH=$PYTHON_PATH:$PATH

# Help CMake find Python headers and library.

# This form of the commands assumes that
# both CMAKE_INCLUDE_PATH and CMAKE_LIBRARY_PATH already exist
# as environment variables.

CMAKE_INCLUDE_PATH=$PYTHON_PATH/include:$CMAKE_INCLUDE_PATH
CMAKE_LIBRARY_PATH=$PYTHON_PATH/libs:$CMAKE_LIBRARY_PATH

That's all that should be normally required to find and use
Python from CMake.

Assuming you have set up PATH, CMAKE_INCLUDE_PATH, and
CMAKE_LIBRARY_PATH correctly for your Python installation,
then the CMake output for the PLplot configuration
should tell you everything you need to know about
your Python setup.

Here are the relevant cmake output lines from my recent successful builds with
Python on MinGW/MSYS/Wine.

-- Found PythonInterp:
z:/home/wine/newstart/python/python-2.7.3/python.exe (found version
"2.7.3")
-- Found PythonLibs:
z:/home/wine/newstart/python/python-2.7.3/libs/libpython27.a (found
version "2.7.3")
-- PYTHON_VERSION = 2.7.3
-- Building Python binding with plsmem() support

PYTHON_EXECUTABLE:
z:/home/wine/newstart/python/python-2.7.3/python.exe
PYTHON_INCLUDE_PATH:
z:/home/wine/newstart/python/python-2.7.3/include
PYTHON_LIBRARIES:
z:/home/wine/newstart/python/python-2.7.3/libs/libpython27.a
NUMERIC_INCLUDE_PATH:
Z:/home/wine/newstart/python/python-2.7.3/Lib/site-packages/numpy/core/include/numpy

Do you get expected results for all of these locations once (a) python
and numpy have been installed correctly as tested above with
the "print numpy.get_include()" command, and (b) you have let
CMake know about the appropriate Python locations using
the environment variables PATH, CMAKE_INCLUDE_PATH, and
CMAKE_LIBRARY_PATH?

Let me know if there is anything I need to explain further in the
above notes, and I hope that by following these notes you will achieve
a permanent end to the Python troubles that you have been having.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________

Linux-powered Science
__________________________