[Gdal-dev] GDAL Java Binding on Linux

[Daniele Romagnoli]

Thx a lot for your suggestions.

In my previous attempts, I already tried your solution by setting (under
eclipse) the VM arguments with the java library path variable, properly
linking to a shared folder.
However, even without MrSID support, I have the same problem.

So, my first objective is understanding how to make GDAL working without
MrSID from java.
Then, I will add again MrSID support.;)

Thx for your help.

Regards,
Daniele


On 8/13/07, Collins, Benjamin <collinsb at mitre.org> wrote:
>
> Because of the GCC version mismatch between the MrSID DSDK and modern
> Linux distros, I have not had the chance to get MrSID going either.  I
> would note, however, that generally one should add a parameter to the
> jvm like:
>   -Djava.library.path=<relative path to libs>
> instead of copying the libraries to a shared location.
>
> On Windows, the MrSID DSDK requires an additional library (DLL) be
> present at runtime.  Since the GDAL binding is the one that 'loads' it,
> the -D flag will generally not help finding it, unless you artificially
> load it yourself in java before GDAL tries to.  This can be
> accomplished with a call like:
>   System.loadLibrary("lti_dsdk_dll"); //FOR WINDOWS, pre-load the DSDK
>   gdal.AllRegister();                   //then start GDAL
> This works on Windows, something like it may be necessary on Linux.
>
> Sorry I could not provide more specifics.  If you got MrSID compiled in
> at all, you're probably close to success.
> --
> Ben
>
> >-----Original Message-----
> >From: gdal-dev-bounces at lists.maptools.org
> >[mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of
> >Daniele Romagnoli
> >Sent: Monday, August 13, 2007 6:36 AM
> >To: gdal-dev at lists.maptools.org
> >Subject: [Gdal-dev] GDAL Java Binding on Linux
> >
> >Hi guys.
> >I have some problems using GDAL java bindings on linux.
> >
> >I'm using Fedora Core 6.
> >I downloaded GDAL from SVN, TAG 1.4.2.
> >I added MrSID support and I built GDAL. (I downloaded the
> >GeoDSDK from Lizardtech, version 6.0.7.1047, for linux x86.gcc34)
> >
> >It works fine... I can successfully use gdalinfo with a MrSID
> >file sample.
> >
> >The GDAL/.libs folder contains 3 files: libgdal.so.1.11.2,
> >libgdal.so and libgdal.so.1 (last 2 are symbolic links)
> >Next step is building Java Binding through SWIG.
> >
> >I launched:
> >cd swig
> >gmake
> >cd java
> >gmake
> >
> >I built the 4 .so (libgdaljni.so, libgdalconstjni.so,
> >libogrjni.so and libosrjni.so) without any error.
> >
> >Then, I put all .SO and Lizardtech lib in
> >java/JDKversion/jre/lib/i386 and launched eclipse.
> >I written a little section of code which uses GDAL and I
> >received the error in the attached file.
> >
> >Since I'm not an expert Linux user, I'm surely doing some wrong
> things.
> >
> >Somewhere, I read that I would have to build GDAL with the
> >same version of GCC used to build the MrSID lib provided by
> >lizardtech.
> >Fedoracore6 uses GCC 4.1.1 but, checking some forums, I think
> >that this error is unrelated with the gcc version but is
> >simply an error due to a wrong use of the .so.
> >
> >As my last recent attempt, I built GDAL without MrSID support
> >and tried the GDALTest java application available in
> >gdal/swig/java but I received the same error.
> >The strange thing is that GDALTest successfully call
> >gdal.AllRegister() as well as gdal.getDriverCount() and
> >similar things.
> >Furthermore, I open a BMP file and I successfully obtain a
> >Dataset instance (Not null).
> >The error occurs when the code does: dataset.getDriver ()
> >
> >So, I'm pretty sure I'm wrong in the use of the .SO.
> >Any suggestion/question to help me solving my problems?
> >
> >Thank you very much.
> >
> >
> >--
> >Best Regards,
> >Daniele Romagnoli
> >
>



-- 
Best Regards,
Daniele Romagnoli
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