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

Yet, on gentoo all right. So, problem seems to be invalid.
But strange, how other hosts can load these ladspa, if loading requires
dlopen() too %/.

> 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
> >
> > _______________________________________________
> > 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 16:15:04 2014