Re: [Jack-Devel] Intermittent internal crash

On May 1, 2012 10:31:21 AM you wrote:
> On 05/01/2012 07:38 AM, Stéphane Letz wrote:
> >> > [177/245] cprogram: build/example-clients/midi_latency_test.c.5.o
> >> > ->
> >> > build/example-clients/jack_midi_latency_test
> >> > /usr/bin/ld: example-clients/midi_latency_test.c.5.o: undefined
> >> > reference to symbol 'trunc@@GLIBC_2.2.5'
> >> > /usr/bin/ld: note: 'trunc@@GLIBC_2.2.5' is defined in DSO
> >> > /usr/lib/gcc/x86_64-
> >> > linux-gnu/4.6.1/../../../x86_64-linux-gnu/libm.so so try adding
> >> > it to the linker command line
> >> > /usr/lib/gcc/x86_64-linux-gnu/4.6.1/../../../x86_64-linux-gnu/libm
> >> > .so: could not read symbols: Invalid operation
> >> > collect2: ld returned 1 exit status
> >> > Waf: Leaving directory `/home/me/Source/jack2-git/build'
> >> > Build failed
> >> > 
> >> > -> task in 'jack_midi_latency_test' failed (exit status 1):
> >> >        {task 32119824: cprogram midi_latency_test.c.5.o ->
> >> > 
> >> > jack_midi_latency_test}
> >> > ['/usr/bin/gcc', '-lm', '-lstdc++',
> >> > 'example-clients/midi_latency_test.c.5.o', '-o',
> >> > '/home/me/Source/jack2-git/build/example-
> >> > clients/jack_midi_latency_test', '-Wl,-Bstatic', '-Wl,-Bdynamic',
> >> > '-Lcommon', '-ljack', '-lpthread', '-lrt', '-ldl']
> > 
> > I was not aware of this one...
> > 
> > What is this undefined reference to sombol "'trunc@@GLIBC_2.2.5' "  ??
> > Anybody knows?
> Add or put "-lm" after the input object (.o).
> 
> https://fedoraproject.org/wiki/UnderstandingDSOLinkChange

Without reading that link, and looking at the link line shown in the
 error, I'd have to confer with this.
MusE was hit with a similar problem several months ago.
From what I could gather, the linker docs now say it is required to 
 put the library names after the object name. 
For us it was weird, I had to change one of our library names and 
 change the way our cmake script linked it.

Anyway, knowing nothing about waf, I rolled up my sleeves and 
 tried to add the -lm after the object name in Jack GIT.
No luck. So I simply removed building examples from top waf script.
Success! Jack GIT built and installed.

---
Now on to the bug: After dozens of runs of my supplied test program...
	I can report...
		I'm happy to say no crash or corruption seen. Yay!
Verified by going back to 1.9.8. Corruption, crash within a few runs.
Will report again if anything changes.

Holy side-streets! Back to work on the ol' app... Now, where was I...

Merci beaucoup Stéphane, thanks.
Tim.

1335920105.3885_0.ltw:2,a <1357555.rvOaGmi4F7 at amd64-desktop>