Re: [Debian-med-packaging] Bug#571491: gdcm: FTBFS with Python 2.6 as default

[Jakub Wilk <jwilk@debian.org>]

Hello,

* Mathieu Malaterre <mathieu.malaterre@gmail.com>, 2010-02-26, 10:04:
>  I am trying to solve the following issue (*). Basically Python.h is
> not found.
>  In order to reproduce it, I tried changing the default python
> version. Here is where I got to.
>
> I read:
> http://codeghar.wordpress.com/2009/01/27/update-alternatives-in-debian/
> http://www.linuxquestions.org/questions/debian-26/change-default-python-version-605397/

It's astonishing how many harmful advices one can find on the web...

> So I blindly followed this instruction and I have now:
> [I have a sid/chroot where I do all my tweakings.]
>
> I changed default-version from python2.5 to python2.6
>
> $ cat /usr/share/python/debian_defaults
> [DEFAULT]
> # the default python version
> default-version = python2.6
>
> # all supported python versions
> supported-versions = python2.5, python2.6
>
> # formerly supported python versions
> old-versions = python2.3, python2.4
>
> # unsupported versions, including older versions
> unsupported-versions = python2.3, python2.4
>
>
> As reported by pyversions -d I was doing something wrong:
>
> $ /usr/bin/pyversions -d
> pyversions: /usr/bin/python does not match the python default version.
> It must be reset to point to python2.6
>
> Ok then I did:
>
> $  update-alternatives --install /usr/bin/python python /usr/bin/python2.5 10
> $  update-alternatives --install /usr/bin/python python /usr/bin/python2.6 20
> $  update-alternatives --config python
>
> All good :
>
> $ ls -al /etc/alternatives/python
> lrwxrwxrwx 1 root root 18 Feb 26 09:01 /etc/alternatives/python ->
> /usr/bin/python2.6
> $ ls -al /usr/bin/python
> lrwxrwxrwx 1 root root 24 Feb 26 09:01 /usr/bin/python ->
> /etc/alternatives/python
>
> Well still no luck:
>
> $ /usr/bin/pyversions -d
> pyversions: /usr/bin/python does not match the python default version.
> It must be reset to point to python2.6

Stop using alternatives, make /usr/bin/python direct symlink to 
python2.6, and it will work.

> Could someone please let me know how I can change the default python
> default version, or at least try to reproduce bug #571491.

FYI, after the failed build:

$ find -name 'flags.make' | xargs grep -o -- '-I/usr/include/python2..'
./debian/build-python2.6/Wrapping/Python/CMakeFiles/_gdcmswig.dir/flags.make:-I/usr/include/python2.6
./debian/build-python2.6/Utilities/VTK/Applications/CMakeFiles/gdcmviewer.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/Applications/CMakeFiles/gdcm2vtk.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/CMakeFiles/vtkgdcmPython.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/CMakeFiles/vtkgdcmPythonD.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/CMakeFiles/vtkgdcmJava.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/CMakeFiles/vtkgdcm.dir/flags.make:-I/usr/include/python2.5
./debian/build-python2.6/Utilities/VTK/CMakeFiles/vtkgdcmsharpglue.dir/flags.make:-I/usr/include/python2.5

So "Python.h: No such file or directory" apparently refers to 
/usr/include/python2.5/Python.h (python2.5-dev was not installed, 
python2.6-dev was).

--
Jakub Wilk

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