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

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