Re: Why is this library not found?

Run it under gdb and see why it doesn't find the library.
On May 1, 2016 9:13 AM, "Aljosha Papsch" <[email protected]> wrote:

> Hi,
>
> unfortunately it doesn't work without the lib prefix either. I tried quite
> a few combinations:
> libgneural
> libgneural-0.0.0
> gneural
> gneural-0.0.0
> gneural-0
>
> From distant memory I recalled that ldconfig needs to be executed to avoid
> LD_LIBRARY_PATH. So I created a conf file for ldconfig at
> /etc/ld.so.conf.d/gneuralnetwork.conf (I'm on Parabola):
> /opt/gneural/lib
>
> But I'm out of luck. Do you have any other hints?
>
> On 01.05.2016 16:05, Robert Boehne wrote:
>
> The string you pass to Lt_dlopen should not contain the "lib" prefix.
> On May 1, 2016 7:12 AM, "Aljosha Papsch" <[email protected]> wrote:
>
>> Hello,
>>
>> I librarified gneural_network, patches pending at:
>> https://lists.gnu.org/archive/html/gneuralnetwork/2016-04/msg00015.html
>> In that patch library is called libgneural_network, locally I modified
>> name to libgneural.
>>
>> Next I installed gneural_network at /opt:
>>
>> /opt/gneural/
>> ├── bin
>> │   └── gneural_network
>> ├── include
>> │   └── gneural
>> │       ├── activation.h
>> │       ├── binom.h
>> │       ├── defines.h
>> │       ├── error.h
>> │       ├── fact.h
>> │       ├── feedforward.h
>> │       ├── genetic_algorithm.h
>> │       ├── gradient_descent.h
>> │       ├── includes.h
>> │       ├── load.h
>> │       ├── msmco.h
>> │       ├── parser.h
>> │       ├── randomize.h
>> │       ├── random_search.h
>> │       ├── rnd.h
>> │       ├── save.h
>> │       ├── simulated_annealing.h
>> │       └── structures.h
>> └── lib
>>     ├── libgneural.a
>>     ├── libgneural.la
>>     ├── libgneural.so -> libgneural.so.0.0.0
>>     ├── libgneural.so.0 -> libgneural.so.0.0.0
>>     └── libgneural.so.0.0.0
>>
>> I try to load that library with lt_dlopen:
>>
>> #include <ltdl.h>
>> #include <stdio.h>
>>
>> int
>> main (int argc, char** argv)
>> {
>>   lt_dlhandle handle;
>>   lt_dlinit ();
>>   handle = lt_dlopen ("libgneural");
>>   if (handle != NULL)
>>     {
>>       printf ("Loaded library\n");
>>       lt_dlclose (handle);
>>     }
>>   else
>>     {
>>       printf (lt_dlerror ());
>>       printf ("\n");
>>     }
>>   return 0;
>> }
>>
>> This program fails with error message: file not found. What am I doing
>> wrong? The command line is:
>> $ gcc -l ltdl -o dlopen dlopen.c
>> $ LD_LIBRARY_PATH=/opt/gneural/lib ./dlopen
>>
>> Best regards
>> Aljosha Papsch
>>
>> _______________________________________________
>> https://lists.gnu.org/mailman/listinfo/libtool
>>
>
>

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