[Mono-list] [mono-list]DLL Import errors

[Jonathan Chambers]

I may be missing something, but are you trying to PInvoke a 32-bit library
(your licensing library) from within a 64-bit mono process? I do not think
that is possible.

Thanks,
Jonathan

On 4/20/07, Jeffrey Stedfast <fejj at novell.com> wrote:
>
> On Wed, 2007-04-18 at 10:28 -0600, Eric Morgan wrote:
> >
> >
> > >Frequently the problem is that the library is improperly linked; mono
> > >(effectively) loads libraries using dlopen(3) with RTLD_NOW set, so
> > if
> > >your library depends on a symbol from another library but wasn't
> > linked
> > >against that library, you will get errors loading it.
> > >
> > >You can also use http://www.jprl.com/dltest.c to test this scenario
> > (see
> > >the comments for compile commands).
> > >
> > >If that still fails, you can reply to the mailing list with the Mono
> > >output attached.
> > >
> > > - Jon
> > >
> >
> > Still fails, and the output is generally the same from when I was
> > using MONO_LOG_LEVEL=debug.  Here's the output from dltest:
> >
> > [rengeo at localhost dltest]$
> > ll /home/rengeo/RenegadeGeophysics/SeismicStudioLinux64/lib/
> > total 992
> > -r-xr-xr-x  1 rengeo rengeo 339956 Apr 17 10:14 libSentinelKeys32.a
> > -r-xr-xr-x  1 rengeo rengeo 315468 Feb  8 14:42 libSentinelKeys32.so
> > -r-xr-xr-x  1 rengeo rengeo 328388 Apr 17 12:26 libSentinelKeysJDK.so
> > [rengeo at localhost
> > dltest]$ ./dltest
> /home/rengeo/RenegadeGeophysics/SeismicStudioLinux64/lib/libSentinelKeys32.so
> > error loading library
> >
> `/home/rengeo/RenegadeGeophysics/SeismicStudioLinux64/lib/libSentinelKeys32.so':
> /home/rengeo/RenegadeGeophysics/SeismicStudioLinux64/lib/libSentinelKeys32.so:
> cannot open shared object file: No such file or directory
> > [rengeo at localhost dltest]$
> >
> >
> > The library is clearly there, but both mono and this dltest is saying
> > that it doesn't exist.  I've tried copying the library directly into
> > the folder with dltest, and it still can't find it, even though is
> > literally right there.
>
> Don't assume that it means that the file you gave it doesn't exist (I
> know, it is the most reasonable assumption to make). I suspect that
> Jonathan is correct, the problem is that your library depends on symbols
> not found in either the application nor in the library you are trying to
> load, and so dlopen() is failing - of course, this is just a guess :)
>
> The only way to know for sure is to read the source code for dlopen()
> and try to figure out what the problem is that way.
>
> Jeff
>
>
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