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(a)lists.linuxaudio.org >>>>>>> http://lists.linuxaudio.org/listinfo/linux-audio-dev > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-dev