[arch-general] Linking issue, glibc weirdness?

[Allan McRae]

On 10/12/11 08:12, Philipp Überbacher wrote:
> Excerpts from Allan McRae's message of 2011-12-09 23:04:54 +0100:
>> 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?
>>>>
>>>> Regards,
>>>> Philipp
>>>>
>>>
>>> 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
>>
>> Allan
> 
> Thanks,
> adding -lpthread helped in this case.
> I'm not looking forward to patching possibly all the other programs I
> maintain.
> 

FYI, I rebuilt the entire [core] and only one package needed fixed for
this.  So this does not appear that widespread.

Allan