[gdal-dev] Google Summer of Code
Dmitry Baryshnikov
bishop.dev at gmail.com
Mon Mar 21 13:03:15 PDT 2016
Hi Tanuj,
I compare current libpng folder and previous one:
1. You include a lot of files needed to build standalone library, but
not need in GDAL sources tree (like configure, CMakeLists.txt, etc.).
2. The makefile.vc removed and it seems to me the windows build will
fail in that case.
3. There was a libpng_gdal.patch file, are you sure that this file is
not necessary?
4. You included several files need for libpng unit testing, but not
needed by GDAL. According to GNUMakefile in png folder, it get all *.c
files from libpng folder, so we need minimum set of *.c and *.h files
there (but enough for VC building too).
About python support - do you did sudo make install (Linux)? The only
building is not enough to have python bindings work (there is a tick
with PYTHONPATH, but not sure that it works.
Best regards,
Dmitry
20.03.2016 10:15, Tanuj Kumar пишет:
> Hello Dmitry,
> Sorry for the long delay, my exams had the better of me, but now
> they're over :) .
> I have updated libpng 1.6.21 and i have created a pull request after
> removing files from original libpng 1.6.21 that I think would not be
> required as a library in GDAL.
> All test on travis have been passed, and you can see the pull request
> here : https://github.com/OSGeo/gdal/pull/108
>
> As for building on desktop, I configured with python, but the same
> issue of "ImportError: No module named osgeo persists". I am trying to
> understand why this is happening, and am working out how to get rid of
> this problem by reading GDAL wiki.
>
> Cheers
> Tanuj
>
> On Tue, Mar 15, 2016 at 1:24 AM, Dmitry Baryshnikov
> <bishop.dev at gmail.com <mailto:bishop.dev at gmail.com>> wrote:
>
> Hi Tanuj,
>
> The error: ImportError: No module named osgeo
> is because you build gdal without python support (you need python
> with developers headers).
> On Linux Linux this is done via such command:
> ./configure --with-python ... <other config options>
>
> On Windows it depends how you build. On Windows I launch separate
> tests successfully but never try the whole tests (run_all.py).
>
> Best regards,
> Dmitry
>
> 14.03.2016 19:11, Tanuj Kumar пишет:
>> Hello Dmitry,
>> I was reading up on the gdalautotest
>> wiki(http://trac.osgeo.org/gdal/wiki/TestingNotes), and it says,
>> "After building with either the old or new generation python
>> bindings, and installing them (or adding them to your path from
>> the build tree)..."
>>
>> I could not understand what that means. I guess this is important
>> because when I tried the commands given on that page, I got the
>> following error :
>>
>> File "./run_all.py", line 37, in <module>
>> import gdaltest
>> File"pymod/gdaltest.py", line 37, in <module>
>> from osgeo import gdal
>> ImportError: No module named osgeo
>>
>>
>> Now, as far as I could understand, it is importing a file called
>> "gdal.py" from a folder called osgeo. I searched for it, and got
>> its path as "gdal/swig/python/osgeo, whereas the autotest folder
>> is separate.
>> So my guess is I have to somehow specify the path of "gdal.py"
>>
>> Could you or anyone please guide me on how to proceed with this?
>>
>> Thanks
>> Tanuj
>>
>> On Sat, Mar 12, 2016 at 11:00 PM, Tanuj Kumar
>> <kmrtnjscnc at gmail.com <mailto:kmrtnjscnc at gmail.com>> wrote:
>>
>> Alright, thank you very much, I'll get to work on it!
>>
>> On Sat, Mar 12, 2016 at 10:47 PM, Dmitry Baryshnikov
>> <bishop.dev at gmail.com <mailto:bishop.dev at gmail.com>> wrote:
>>
>> Hi Tanuj,
>>
>> I wrote a big letter to the list. There is some answers
>> there. Also I add comments below.
>>
>> Best regards,
>> Dmitry
>>
>> 12.03.2016 10:36, Tanuj Kumar пишет:
>>> Sorry for replying so late, got caught up in an exam :)
>>>
>>> I replaced libpng folder of gdal (frmts/png/libpng) with
>>> libpng 1.6.21. And then used ./configure and make
>>> install on this test version of gdal, which installed
>>> successfully. I used gdalinfo on a png file provided
>>> with the libpng 1.6.21 source, to check if it was OK,
>>> and it successfully gave the png file details.
>>>
>>> Is that enough to check the build on the computer?
>> No, the autotests must be passed.
>>>
>>> I have also tested the gdal library with libpng 1.6.21
>>> on Travis, and the build succeeded.
>>> https://travis-ci.org/Raeburn1687/gdal/builds/115487530
>>>
>>> Would all that be enough to check whether the update was
>>> succesful?
>> I expected that travis from main gdal repo checked your PR.
>>>
>>> PS - Although I have copied the files from libpng 1.6.21
>>> source to the gdal libpng folder, how would I know if
>>> any of those files are not required for gdal?
>>>
>> You need to see the previous version. Some files not
>> needed (i.e. configures and so on, which already comes
>> from gdal, but legal notice must be present (license,
>> autors, etc.) ). Don't hesitate to ask in list.
>>
>>
>>> Thank you
>>>
>>> Tanuj
>>>
>>> On Thu, Mar 10, 2016 at 2:07 PM, Dmitry Baryshnikov
>>> <bishop.dev at gmail.com <mailto:bishop.dev at gmail.com>> wrote:
>>>
>>> Hi Tanuj,
>>> 09.03.2016 13:17, Tanuj Kumar пишет:
>>>> Yes, I have looked at the ideas list, and I am
>>>> currently reading up on idea no. 16, which is,
>>>> implementing support for the proposed standard for
>>>> incrementally parseable GeoJSON data.
>>>>
>>>> Also, I was thinking that maybe I could work on
>>>> ticket no 6294, https://trac.osgeo.org/gdal/ticket/6294
>>>> after I've studied about the GSoC idea, which is
>>>> not really a bug, but an enhancement. But if there
>>>> are any other tickets that you or anyone else would
>>>> like to recommend me to work on, I'd love to see
>>>> them too!
>>> I think this rather arguing ticket as the bool is
>>> not exist in plain C, and duplication functions
>>> seems to me not good idea.
>>> I think this ticket
>>> https://trac.osgeo.org/gdal/ticket/6185 is good for:
>>> 1. building GDAL, 2. Testing via TraviC on GitHub.
>>> By the way the libpng version is 1.6.21 or maybe higher.
>>>
>>> Anyhow, you have to try to build gdal and test it
>>> with autotests from appropriate folder.
>>>>
>>>> Now, about the GSoC idea, do I need to know JSON(
>>>> or GeoJSON, for that matter) to work on it? I only
>>>> ask because the idea lists C/C++ as the required
>>>> skills, but I feel that maybe this work would
>>>> involve knowing JSON too...
>>> Yes, certainly. But JSON are very simple. Also
>>> GeoJSON spec. can be found here
>>> http://geojson.org/Thanks and regards,
>>>
>>>>
>>>> Tanuj
>>>>
>>>>
>>>> On Wed, Mar 9, 2016 at 2:58 PM, Dmitry Baryshnikov
>>>> <bishop.dev at gmail.com
>>>> <mailto:bishop.dev at gmail.com>> wrote:
>>>>
>>>> Hi, Tanuj
>>>>
>>>> I'll look for opened tickets for you, or maybe
>>>> others can recommend some for you.
>>>>
>>>> By the way, do you see the idea list
>>>> (https://trac.osgeo.org/gdal/wiki/SummerOfCode#a2016IdeasList)?
>>>>
>>>> The ideas are not ranked yet - the numbers in
>>>> the list - are only in order.
>>>> This is a task for us to rank the ideas.
>>>> But, have you some preferable idea (or ideas)
>>>> for GSoC from this list or maybe you have got own?
>>>>
>>>> Best regards,
>>>> Dmitry
>>>>
>>>> 04.03.2016 16:11, Tanuj Kumar пишет:
>>>>> Hello,
>>>>> I am interested in applying for GSoC this
>>>>> year. Currently, I am reading up on the GDAL
>>>>> Summer of Code ideas list. I know C++ and C,
>>>>> and I have some experience on working on linux.
>>>>> Could the mentors please recommend a bug for
>>>>> me to work on, I'd really love to start off as
>>>>> soon as possible!
>>>>>
>>>>> Thank you,
>>>>>
>>>>> Tanuj Kumar
>>>>> Birla institute of Technology and Science
>>>>> Pilani, Rajasthan,
>>>>> India
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> gdal-dev mailing list
>>>>> gdal-dev at lists.osgeo.org
>>>>> <mailto:gdal-dev at lists.osgeo.org>
>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>
>>>>
>>>> _______________________________________________
>>>> gdal-dev mailing list
>>>> gdal-dev at lists.osgeo.org
>>>> <mailto:gdal-dev at lists.osgeo.org>
>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>
>>>>
>>>
>>> Best regards,
>>> Dmitry
>>>
>>>
>>
>>
>>
>
>
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