Package: libupnp2
Version: 1.4.3-2
Severity: serious
Hello.
I was looking at the wmaloader FTBFS on mips and mipsel, which fails
with:
gcc -lixml -lupnp -lthreadutil -L/usr/lib wmaloader.o image_transfer.o
common.o -o wmaloader
wmaloader.o: In function `initialise_sync_variables':
wmaloader.c:(.text+0x3c4): undefined reference to `sem_init'
wmaloader.o: In function `initialise_image_transfer':
wmaloader.c:(.text+0x464): undefined reference to `pthread_create'
wmaloader.o: In function `LoaderCallbackFunc':
wmaloader.c:(.text+0x7e4): undefined reference to `sem_post'
wmaloader.o: In function `main':
wmaloader.c:(.text+0x118c): undefined reference to `sem_wait'
/usr/lib/libthreadutil.so: undefined reference to `pthread_detach'
collect2: ld returned 1 exit status
make[1]: *** [wmaloader] Error 1
On IRC I received some help in diagnosing the problem:
<dato> does this mips buildd failure ring a bell to anybody about a toolchain
bug?:
http://buildd.debian.org/fetch.cgi?pkg=wmaloader;ver=0.1-3%2Bb1;arch=mips;stamp=1178762221
<broonie> dato: Looks more like it should be linking with pthreads and rt but
isn't.
<vorlon> dato: looks like a straightforward missing linker option, yeah?
<vorlon> doesn't look like a toolchain bug at all to me
<dato> aha; I asked because all other arches built it just fine...
<dato> (with the same flags)
<vorlon> dunno why they would have, but even if they did, I still think it's
the package's mistake
<dato> okay then, thanks
<broonie> I suspect that oon other platforms libthreadutil pulls in pthreads
but on MIPS the linker isn't seeing the
exported symbols for some reason.
<broonie> (just guessing by the name)
<vorlon> ah, then it's a bug in both libthreadutil and wmaloader
<vorlon> well
<vorlon> rather, libthreadutil doesn't account for the known, different
behavior of the -pthread flag when linking DSOs
on mips*
<vorlon> and wmaloader should be linking -lpthread directly anyway
<broonie> Besides, the app is using the symbols directly.
<broonie> snap
<vorlon> dato: so if libthreadutil also uses pthread, it's mislinked on mips*
because -shared -pthread does not imply
-lpthread on those archs (longstanding toolchain bug, AIUI)
/usr/lib/libthreadutil.so.2:
libc.so.6 => /lib/libc.so.6 (0x2aaf8000)
/lib/ld.so.1 => /lib/ld.so.1 (0x55550000)
undefined symbol: pthread_detach (/usr/lib/libthreadutil.so.2)
undefined symbol: pthread_create (/usr/lib/libthreadutil.so.2)
Cheers,
--
Adeodato Simó dato at net.com.org.es
Debian Developer adeodato at debian.org
Man: Wow, that woman looks exactly the way Nina is going to look in
about ten years... Oh shit, it is Nina. Don't tell her what I said, okay?
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