[arch-general] Linking issue, glibc weirdness?

[clemens fischer]

Allan McRae wrote:

> On 10/12/11 07:29, Ionut Biru wrote:
>
>> On 12/09/2011 09:25 PM, Philipp wrote:
>>
>>> Hi there, I have linking issues with one of the programs I maintain
>>> in AUR and I don't quite understand the issue. Here's the output:
>>>
>>> g++ -Wl,-O1,--sort-common,--as-needed,-z,relro,--hash-style=gnu
>>> -L/usr/X11R6/lib -o jmeters jmeters.o styles.o mainwin.o jclient.o
>>> mkimage.o meterwin.o -lsndfile -lclxclient -lclthreads -ljack
>>> -lpng -lXft -lX11 -lrt /usr/bin/ld: jmeters.o: undefined reference
>>> to symbol 'pthread_mutex_trylock@@GLIBC_2.2.5' /usr/bin/ld:
>>> note: 'pthread_mutex_trylock@@GLIBC_2.2.5' is defined in DSO
>>> /lib/libpthread.so.0 so try adding it to the linker command line
>>> /lib/libpthread.so.0: could not read symbols: Invalid operation
>>> collect2: ld returned 1 exit status make: *** [jmeters] Error 1
>>>
>>> The program is jmeters
>>> (https://aur.archlinux.org/packages.php?ID=25711).
>>>
>>> It depends on clthreads
>>> (https://aur.archlinux.org/packages.php?ID=3627) which handles the
>>> threading stuff.
>>>
>>> I wonder where this problem comes from. Needles to say that it
>>> worked fine in the past. Any ideas?
>>
>> sounds like you don't have a fully up to date toolchain
>
> Actually, it sounds like he does have a fully up-to-date toolchain:
> http://fedoraproject.org/wiki/UnderstandingDSOLinkChange
>
> The output also gives the fix...
>>> /usr/bin/ld: note: 'pthread_mutex_trylock@@GLIBC_2.2.5' is defined in
>>> DSO /lib/libpthread.so.0 so try adding it to the linker command line

I think you're both wrong  8-)

The ld(8) output seems to indicate that libpthread is pulled in, but
points to something else than a fully functioning library.

  $ ls -l /lib/libpthread*
  -rwxr-xr-x 1 root root 135326 Dec  2 19:28 /lib/libpthread-2.14.1.so
  lrwxrwxrwx 1 root root     20 Dec  2 19:28 /lib/libpthread.so.0 -> libpthread-2.14.1.so

  $ nm /lib/libpthread.so.0 |g mutex.try
  -:0000000000009f40 T __pthread_mutex_trylock
  -:0000000000009f40 T pthread_mutex_trylock

Philipp, what's the output of these commands at your place?


clemens