Re: [LAD] ladspa: dlopen failed for tap ladspa plugins

This. Is. Weird.

Did you compile the tap plugins yourself?
If yes: what version do you have? how did you compile it?
If no: what linux distribution do you use?

On 05/18/2014 12:42 PM, Zlobin Nikita wrote:
> No dependency on libm.
> $ ldd /usr/lib/ladspa/tap_echo.so
> linux-vdso.so.1 => (0x00007fff9dffe000)
> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f9472f16000)
> /lib64/ld-linux-x86-64.so.2 (0x00007f9473523000)
>
>> Okay, seems there is a problem with the libm
>> (math library).
>>
>> Type that and send me the result:
>> ldd /usr/lib/ladspa/tap_echo.so
>>
>> If there is a line like:
>> libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f9d59562000)
>>
>> type:
>> readelf -a /lib/x86_64-linux-gnu/libm.so.6 | grep powf
>>
>> and send me the result too.
>>
>> If there is no "libm" line, then there is indeed a problem
>> and we'll try new things.
>>
>> How did you install /usr/lib/ladspa/tap_echo.so?
>> Did you compile yourself?
>>
>> Please, answer all my questions so I can help you correctly.
>>
>> On 05/18/2014 12:17 PM, Zlobin Nikita wrote:
>>> Sorry, i did not know about dlerror().
>>> Output:
>>> dlopen failed: /usr/lib/ladspa/tap_echo.so (dlerror:
>>> /usr/lib/ladspa/tap_echo.so: undefined symbol: __powf_finite)
>>> dlerror? (null)
>>>
>>>> In my code I call dlerror to print the error.
>>>> What is printed?
>>>> And can you send me the strace log so I have a look
>>>> at what's going on?
>>>>
>>>> On 05/18/2014 11:15 AM, Zlobin Nikita wrote:
>>>>> I don't see any changes. In my code following check fails:
>>>>> if (pvPluginHandle)
>>>>> Shortly - dlopen returns NULL, so futher struggle is useless.
>>>>>
>>>>>> try that:
>>>>>>
>>>>>> #include <stdio.h>
>>>>>> #include <dlfcn.h>
>>>>>> int main (int argc, char ** argv)
>>>>>> {
>>>>>>
>>>>>> //LADSPAPluginSearch(describePluginLibrary);
>>>>>> char plugpath [] = "/usr/lib/ladspa/tap_echo.so";
>>>>>> void * pvPluginHandle = dlopen(plugpath, RTLD_NOW | RTLD_LOCAL);
>>>>>> if (pvPluginHandle) dlclose (pvPluginHandle);
>>>>>> else printf ("dlopen failed: %s (dlerror: %s)\n",
>>>>>>
>>>>>> plugpath, dlerror());
>>>>>>
>>>>>> printf("dlerror? %s\n", dlerror());
>>>>>>
>>>>>> return 0;
>>>>>>
>>>>>> }
>>>>>>
>>>>>> compile with:
>>>>>> gcc -Wall bug.c -ldl -o bug
>>>>>>
>>>>>> then run:
>>>>>> ./bug
>>>>>>
>>>>>> what happens?
>>>>>> If it fails, can you run:
>>>>>> strace ./bug 2>&1 > strace.log
>>>>>> and send me the strace.log file.
>>>>>>
>>>>>> and also tell me what "gcc --version" says,
>>>>>> and what "uname -a" says.
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>> On 05/18/2014 07:07 AM, Zlobin Nikita wrote:
>>>>>>> Fons: i tried with existing path.
>>>>>>> Library path is valid - i checked it with ls (doing it for ladspa dir
>>>>>>> before to get libraries list).
>>>>>>>
>>>>>>> Code - includes are omited, line with main() declaration is numbered
>>>>>>>
>>>>>>> 30: int main (int argc, char ** argv)
>>>>>>> {
>>>>>>>
>>>>>>> //LADSPAPluginSearch(describePluginLibrary);
>>>>>>> char plugpath [] = "/usr/lib/ladspa/tap_echo.so";
>>>>>>> void * pvPluginHandle = dlopen(plugpath, RTLD_NOW | RTLD_LOCAL);
>>>>>>> if (pvPluginHandle) dlclose (pvPluginHandle);
>>>>>>> else printf ("dlopen failed: %s\n", plugpath);
>>>>>>> return 0;
>>>>>>>
>>>>>>> }
>>>>>>>
>>>>>>> hermann: thanks, will look
>>>>>>>
>>>>>>>> On 05/17/2014 10:15 PM, Zlobin Nikita wrote:
>>>>>>>>> Backtrace of scanning crash (gdb output) is in attachement (too long
>>>>>>>>> lines
>>>>>>>>> in email message are automatically wrapped - don't know, is it good
>>>>>>>>> to
>>>>>>>>> violate this).
>>>>>>>>
>>>>>>>> You should provide some code, it's hard to help you without seeing
>>>>>>>> what
>>>>>>>> your program really does.
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Linux-audio-dev mailing list
>>>>>>> Linux-audio-dev@email-addr-hidden
>>>>>>> http://lists.linuxaudio.org/listinfo/linux-audio-dev
>
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Received on Sun May 18 16:15:03 2014