The following issue has been SUBMITTED. ====================================================================== http://public.kitware.com/Bug/view.php?id=15510 ====================================================================== Reported By: nickdesaulniers Assigned To: ====================================================================== Project: CMake Issue ID: 15510 Category: CMake Reproducibility: always Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 2015-04-13 03:07 EDT Last Modified: 2015-04-13 03:07 EDT ====================================================================== Summary: After 15.04 upgrade, cannot link against against pthread using C++11 <thread> Description: So I recently upgraded my headless server from 14.04 to 15.04 using `sudo do-release-upgrade -d`. After the upgrade, I had to reinstall boost, but one of my projects that I build with cmake stopped building.
➜ build git:(master) ✗ make Scanning dependencies of target main [ 33%] Building CXX object CMakeFiles/main.dir/hello.cpp.o [ 66%] Building CXX object CMakeFiles/main.dir/packet.cpp.o [100%] Building CXX object CMakeFiles/main.dir/key_value_store.cpp.o Linking CXX executable main /usr/bin/ld: CMakeFiles/main.dir/hello.cpp.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5' /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status CMakeFiles/main.dir/build.make:136: recipe for target 'main' failed make[2]: *** [main] Error 1 CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/main.dir/all' failed make[1]: *** [CMakeFiles/main.dir/all] Error 2 Makefile:76: recipe for target 'all' failed make: *** [all] Error 2 I had to explicitly link against pthread to have <thread> support for C++11, when prior to my upgrade to 15.04, I did not have to. Not sure if this is cmake related or not. Steps to Reproduce: git checkout https://github.com/nickdesaulniers/cpp11-memcached.git cd cpp11-memcached git checkout b419bd mkdir build cd build cmake .. make Additional Information: Originally posted here: http://ubuntuforums.org/showthread.php?t=2273365 Not sure if there's some incompatibility between cmake and new versions of Ubuntu, or if I have a botched upgrade. It's just odd that this used to work without this patch: https://github.com/nickdesaulniers/cpp11-memcached/commit/4ce7505335c59754033b3c90409be050eb48d134 ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2015-04-13 03:07 nickdesaulniersNew Issue ====================================================================== -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/cmake-developers
