Cannot compile digikam: undefined reference to pthread lib

[Gerhard Kulzer]

Hello everybody,
I've had a problem for the last couple of weeks, I can't compile digikam anymore:

...
Scanning dependencies of target kipiplugin_gpssync                                                                                         
[ 23%] /usr/bin/ld: ../../../../lib/liblibdng.a(dng_mutex.cpp.o): undefined reference to symbol 'pthread_key_delete@@GLIBC_2.2.5'          
/usr/bin/ld: note: 'pthread_key_delete@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux-gnu/libpthread.so.0 so try adding it to the linker command line
/lib/x86_64-linux-gnu/libpthread.so.0: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[2]: *** [extra/kipi-plugins/dngconverter/test/raw2dng] Error 1
make[1]: *** [extra/kipi-plugins/dngconverter/test/CMakeFiles/raw2dng.dir/all] Error 2
...

I tried to fix it by including -lpthread (or rather adding ${CMAKE_USE_PTHREADS_INIT} to the CmakeList.txt) as is proposed by various references I found on the web, but to no avail.

I'm running

• libc6 version  2.13-6ubuntu2
• gcc 4:4.6.0-5ubuntu1

Anybody any idea?

Gerhard


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[Gilles Caulier-4]

Hi Gerhard,

2011/6/26 Gerhard Kulzer <[hidden email]>

Hello everybody,
I've had a problem for the last couple of weeks, I can't compile digikam anymore:

...
Scanning dependencies of target kipiplugin_gpssync                                                                                         

^^^ why gpssync here. libdng is only used in DNGConverter...

 

[ 23%] /usr/bin/ld: ../../../../lib/liblibdng.a(dng_mutex.cpp.o): undefined reference to symbol 'pthread_key_delete@@GLIBC_2.2.5'          
/usr/bin/ld: note: 'pthread_key_delete@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux-gnu/libpthread.so.0 so try adding it to the linker command line
/lib/x86_64-linux-gnu/libpthread.so.0: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[2]: *** [extra/kipi-plugins/dngconverter/test/raw2dng] Error 1
make[1]: *** [extra/kipi-plugins/dngconverter/test/CMakeFiles/raw2dng.dir/all] Error 2
...

It sound like a mess in your local cmake configuration. Clean up all, checkout software collection and recompile all from scratch.

 

I tried to fix it by including -lpthread (or rather adding ${CMAKE_USE_PTHREADS_INIT} to the CmakeList.txt) as is proposed by various references I found on the web, but to no avail.

And DNG converter is already linked with Pthread.

 

Gilles

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