Re: [Visualpython-users] vpython5 on ubuntu 9.4 problems with installation

[Bruce S. <Bru...@nc...>]

I recognize this problem, which is a bug in some versions of the Boost 
libraries. What version of Boost are you using?

I found the following on the web:

**************
Furthermore building pyrap with boost-1.37 and gcc-4.3.2 gave an error
due to a missing include. The following patch has to be applied to boost:

Index: boost/python/detail/translate_exception.hpp
===================================================================
--- boost/python/detail/translate_exception.hpp (revision 50228)
+++ boost/python/detail/translate_exception.hpp (working copy)
@@ -9,6 +9,7 @@

  # include <boost/call_traits.hpp>
  # include <boost/type_traits/add_const.hpp>
+# include <boost/type_traits/add_reference.hpp>

  # include <boost/function/function0.hpp>
***************

I was able to build Visual 5 on ubuntu 9.04 without having to make this change, 
as I happened to pick Boost 1.35 in the package manager, which apparently 
doesn't have this bug, but I had to make this change on Windows using Boost 1.38.

Since Python 2.6 ships with ubuntu 9.04, and there is now a numpy for Python 2.6 
(a very recent development), I built Visual 5 for Python 2.6, and most example 
programs run okay, but:

On both Windows and ubuntu, when I build Visual for Python 2.6 and numpy 1.3.0, 
I get a run-time failure on something that works on Python 2.5 with numpy 1.2.1. 
There is a vector(double,double,double) class in Visual which now fails if 
handed numpy.int32 arguments (works fine with numpy.float64 arguments). I used 
Boost 1.35 with Python 2.5 and have used Boost 1.38 on Windows and 1.35 on unbuntu.

This test routine fails:

xs = arange(0,10,1) # works okay if xs = arange(0,10,0.1)
x = xs[1]
print type(x)
v = vector(x,0,0)
print v

I've posted pleas for help on both the Boost and numpy mailing lists but haven't 
gotten any replies. I would much appreciate suggestions for what to do.

Bruce Sherwood

Lenica Reggie wrote:
> Hello all,
> 
> I'm having trouble building vpython 5 on ubuntu 9.4. I had it up and 
> running on 8.10, but for some reason it is unwilling to compile on the 
> newer version. I am using python version 2.6.2 and gcc compiler version 
> 4.3, and I'm pretty sure I installed all the packages mentioned in the 
> INSTALL.txt and I even tried changing to the newest threadpool version 
> with no success. The error message I get in build.log is the following 
> (attatched you can see the whole log file):
> 
> 
> In file included from 
> /usr/include/boost/python/exception_translator.hpp:12,
> from ../../visual-5.03_candidate/src/python/cvisualmodule.cpp:11:
> /usr/include/boost/python/detail/translate_exception.hpp:34: error: 
> expected nested-name-specifier before ‘add_reference’
> /usr/include/boost/python/detail/translate_exception.hpp:34: error: 
> expected ‘;’ before ‘<’ token
> /usr/include/boost/python/detail/translate_exception.hpp: In member 
> function ‘bool boost::python::detail::translate_exception<ExceptionType, 
> Translate>::operator()(const boost::python::detail::exception_handler&, 
> const boost::function0<void>&, typename 
> boost::call_traits<Translate>::param_type) const’:
> /usr/include/boost/python/detail/translate_exception.hpp:56: error: 
> expected type-specifier before ‘exception_cref’
> /usr/include/boost/python/detail/translate_exception.hpp:56: error: 
> expected `)' before ‘e’
> /usr/include/boost/python/detail/translate_exception.hpp:56: error: 
> expected `{' before ‘e’
> /usr/include/boost/python/detail/translate_exception.hpp:56: error: ‘e’ 
> was not declared in this scope
> /usr/include/boost/python/detail/translate_exception.hpp:56: error: 
> expected `;' before ‘)’ token