[gdal-dev] Fwd: GPKG Driver

[Dmitriy Baryshnikov]

Hi,

I would like mention that VS Express from 2011 to 2013 have x64 compiler 
(may be earlier have to, but I didn't check). And I have compiled x64 
version GDAL using CMake 
(https://github.com/aashish24/gdal-svn/tree/cmake4gdal). The OpenMP is 
absent :(

Best regards,
     Dmitry

29.10.2013 12:55, Even Rouault пишет:
> Selon Pepijn Van Eeckhoudt <pepijn at vaneeckhoudt.net>:
>
>>> Regarding cmake, I guess that adding the names of the .c files in a
>> GNUmakefile
>>> / makefile.vc should do it. One worry I have is the minimum MSVC version to
>>> build it. In libgpkg history I see a mention of Visual Studio Express 2012.
>>> Don't know if it works with older versions but I can see some use of C99
>>> (int64_t) extensions that will likely not please older compiler versions.
>> It's indeed a C99 library. Seems silly to still not be able to use a language
>> revision from more than a decade ago.
>>
>> For msvc I'm using the 'compile as c++' flag to work around lack of c99
>> support. From the 2013 release notes it looks like there's now sufficient
>> support for c99 that this will no longer be necessary, but I haven't tested
>> that yet. 2012 is what I tested with so far. Might work on older versions but
>> never tried.
>> Are people still using old msvc compilers these days ?
> Yes, people are sometimes a few versions behind the latest one. There are
> sometimes good (or bad) reasons to do that. For example for a software
> distribution like OSGeo4W, you want to make sure as much as possible that all
> components are built with the same compiler version to avoid issues with
> different and incompatible C runtime. And migrating a full stack of software can
> take some time. You may also have to deal with binary SDKs (FileGDB, ECW SDK,
> etc...) that are provided only for a few versions of the compiler, and not
> necessarily the latest one.
>
> As an example of how antique compilers can be used, Tamas Szekeres maintains
> builds of GDAL and MapServer from MSVC 1310 (VS 2003) to MSVC 1600 :
> http://gisinternals.com/sdk/ . VS 2003 and 2005 is admitedly a bit extreme now.
>
>> Why would you if the recent ones are available for free?
> This has maybe changed in latest releases, but the Express editions in the past
> didn't include Win64 support for example. I also believe they didn't have OpenMP
> support, but I don't think it is widely used in OSGeo4W stack.
>
> Even
>
>
>
>
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