scipy.weave.converters.blitz fails with g++4.3 (Trac #739)

[scipy-gitbot]

Original ticket http://projects.scipy.org/scipy/ticket/739 on 2008-09-18 by trac user jwolter, assigned to unknown.

A script using converters.blitz in an scipy.weave.inline statement stopped working lately.

#!python
from scipy.weave import inline, converters
...
inline(code,
        ['hs', 'lumBlur', 'lumImg',
         'img'],
        type_converters = converters.blitz,
        support_code = support,
        libraries = ['m'],
        verbose=0
      )

Suddenly I got the following error:

...
In file included from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/applics.h:400,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/vecexpr.h:32,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/vecpick.cc:16,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/vecpick.h:293,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/vector.h:449,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/tinyvec.h:430,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array-impl.h:44,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array.h:32,
                 from /home/jw/.python25_compiled/sc_ef45038834ace16052d05de4cc06f8523.cpp:11:
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/mathfunc.h: In static member function 'static long int blitz::_bz_abs<long int>::apply(long int)':
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/mathfunc.h:45: error: 'labs' is not a member of 'std'
In file included from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array/funcs.h:29,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array/newet.h:29,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array/et.h:27,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array-impl.h:2515,
                 from /usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/array.h:32,
                 from /home/jw/.python25_compiled/sc_ef45038834ace16052d05de4cc06f8523.cpp:11:
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/funcs.h: In static member function 'static int blitz::Fn_abs<int>::apply(int)':
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/funcs.h:509: error: call of overloaded 'abs(int&)' is ambiguous
/usr/include/c++/4.3/cmath:99: note: candidates are: double std::abs(double)
/usr/include/c++/4.3/cmath:103: note:                 float std::abs(float)
/usr/include/c++/4.3/cmath:107: note:                 long double std::abs(long double)
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/funcs.h: In static member function 'static long int blitz::Fn_abs<long int>::apply(long int)':
/usr/lib/python2.5/site-packages/scipy/weave/blitz/blitz/funcs.h:530: error: 'labs' is not a member of 'std'
/home/jw/.python25_compiled/sc_ef45038834ace16052d05de4cc06f8523.cpp: In function 'char* find_type(PyObject*)':
...

In the Debian BTS I found a small patch which is supposed to solve this issue:

• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=455661
• http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;filename=blitz%2B%2B.patch;att=1;bug=455661

Maybe this patch should also be applied to the scipy-blitz sources.

I'm using scipy 0.6.0 (Debian package 0.6.0-12) and g++4.3.1.

Regards,
Johannes Wolter

[scipy-gitbot]

@fperez wrote on 2008-11-18

As noted here:

http://projects.scipy.org/pipermail/scipy-user/2008-November/018739.html

the issue can be worked around by using g++ 4.2. Just noting the workaround here until a proper fix is committed.

[scipy-gitbot]

@stefanv wrote on 2009-02-13

I applied the Blitz patch given above at

http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;filename=blitz%2B%2B.patch;att=1;bug=455661

to trunk, so we shouldn't have this problem in 0.7.1.

[scipy-gitbot]

Milestone changed to 0.7.1 by @stefanv on 2009-02-13

[scipy-gitbot]

trac user ysr wrote on 2010-04-28

I am still having this problem in scipy 0.7.2 (installed from the sourceforge stable install) on a Ubuntu 9.10 box with gcc 4.4.1

[scipy-gitbot]

Milestone changed to 0.8.0 by trac user ysr on 2010-04-28

[scipy-gitbot]

Attachment added by @charris on 2010-10-07: weave-739.patch

[scipy-gitbot]

@charris wrote on 2010-10-07

Ubuntu 10.04 has released a patch for this. There are two more includes of than presently in svn. Patch attached.

[scipy-gitbot]

@rgommers wrote on 2011-06-12

Any reason not to commit your patch?

[scipy-gitbot]

Milestone changed to Unscheduled by @rgommers on 2011-06-12

[person142]

Closing since weave is no longer a part of SciPy. This issue is now tracked at scipy/weave#7.