[LAD] ladspa: dlopen failed for tap ladspa plugins

[Zlobin Nikita]

Oops, wrong email destination.

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 at lists.linuxaudio.org
> >>> http://lists.linuxaudio.org/listinfo/linux-audio-dev