Re: [CMake] undefined reference to 'pthread_create'
Am Donnerstag, 4. Februar 2016, 10:53:37 schrieb rpela...@archlinux.info: > I believe that doesn't have anything to do with C11 flags. You are just > missing the link to the pthread library. I could be wrong. > > Try and add this to your cmake file: > find_package (Threads) First: > set(THREADS_PREFER_PTHREAD_FLAG TRUE) Always set this if you don't need to be backwards compatible to some obscure old CMake code. If you _need_ threads: > find_package (Threads REQUIRED) If it is not required, but optional, check THREADS_FOUND afterwards. If you can require a CMake >= 3.1: > target_link_libraries(mything Threads::Threads) Eike signature.asc Description: This is a digitally signed message part. -- 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
Re: [CMake] undefined reference to 'pthread_create'
Thanks, guys This is working now. Cheers, Aaron On Thu, Feb 4, 2016 at 1:05 PM, J Decker wrote: > On Thu, Feb 4, 2016 at 9:55 AM, Aaron Boxer wrote: > > Thanks. So, even though threading is part of the standard, I still need > to > > link to pthreads library ? > > Yes; sounds more like an issue for GCC :) I mean you don't have to > tell it to link against c library or c++ runtime libraries... and it > IS pthread specific so it's not like there's going to be some > alternative provider for such services. > > using MinGW under linux to get a windows output it links automatically > to a 'winpthreads.dll' which then becomes a runtime requirement... so > it's not impossible for the compiler suite to do. > > > > > > On Thu, Feb 4, 2016 at 11:53 AM, rpela...@archlinux.info > > wrote: > >> > >> I believe that doesn't have anything to do with C11 flags. You are just > >> missing the link to the pthread library. I could be wrong. > >> > >> Try and add this to your cmake file: > >> > >> find_package (Threads) > >> > >> target_link_libraries (myexecutable/lib ${CMAKE_THREAD_LIBS_INIT}) > >> > >> > >> > >> Sent from my iPhone > >> > >> On Feb 4, 2016, at 10:42 AM, Aaron Boxer wrote: > >> > >> Hello, > >> I have a cmake project that uses C++11 threads. > >> I have added the lines > >> > >> set (CMAKE_CXX_STANDARD 14) > >> set(CMAKE_CXX_STANDARD_REQUIRED ON) > >> > >> > >> CMAKE version is 3.2.2, running on Ubuntu. > >> > >> When I try to build, I get the error > >> > >> undefined reference to `pthread_create` > >> > >> Any ideas on how to fix this? > >> > >> Thanks! > >> Aaron > >> > >> -- > >> > >> 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 > > > > > > > > -- > > > > 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 > -- 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
Re: [CMake] undefined reference to 'pthread_create'
On Thu, Feb 4, 2016 at 9:55 AM, Aaron Boxer wrote: > Thanks. So, even though threading is part of the standard, I still need to > link to pthreads library ? Yes; sounds more like an issue for GCC :) I mean you don't have to tell it to link against c library or c++ runtime libraries... and it IS pthread specific so it's not like there's going to be some alternative provider for such services. using MinGW under linux to get a windows output it links automatically to a 'winpthreads.dll' which then becomes a runtime requirement... so it's not impossible for the compiler suite to do. > > On Thu, Feb 4, 2016 at 11:53 AM, rpela...@archlinux.info > wrote: >> >> I believe that doesn't have anything to do with C11 flags. You are just >> missing the link to the pthread library. I could be wrong. >> >> Try and add this to your cmake file: >> >> find_package (Threads) >> >> target_link_libraries (myexecutable/lib ${CMAKE_THREAD_LIBS_INIT}) >> >> >> >> Sent from my iPhone >> >> On Feb 4, 2016, at 10:42 AM, Aaron Boxer wrote: >> >> Hello, >> I have a cmake project that uses C++11 threads. >> I have added the lines >> >> set (CMAKE_CXX_STANDARD 14) >> set(CMAKE_CXX_STANDARD_REQUIRED ON) >> >> >> CMAKE version is 3.2.2, running on Ubuntu. >> >> When I try to build, I get the error >> >> undefined reference to `pthread_create` >> >> Any ideas on how to fix this? >> >> Thanks! >> Aaron >> >> -- >> >> 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 > > > > -- > > 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 -- 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
Re: [CMake] undefined reference to 'pthread_create'
Thanks. So, even though threading is part of the standard, I still need to link to pthreads library ? On Thu, Feb 4, 2016 at 11:53 AM, rpela...@archlinux.info < rpela...@archlinux.info> wrote: > I believe that doesn't have anything to do with C11 flags. You are just > missing the link to the pthread library. I could be wrong. > > Try and add this to your cmake file: > > find_package (Threads) > > target_link_libraries (myexecutable/lib ${CMAKE_THREAD_LIBS_INIT}) > > > > Sent from my iPhone > > On Feb 4, 2016, at 10:42 AM, Aaron Boxer wrote: > > Hello, > I have a cmake project that uses C++11 threads. > I have added the lines > > set (CMAKE_CXX_STANDARD 14) > set(CMAKE_CXX_STANDARD_REQUIRED ON) > > > CMAKE version is 3.2.2, running on Ubuntu. > > When I try to build, I get the error > > undefined reference to `pthread_create` > > Any ideas on how to fix this? > > Thanks! > Aaron > > -- > > 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 > > -- 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
Re: [CMake] undefined reference to 'pthread_create'
Probably didn't previously need pthreads until you updated to use C++11 features which brings in pthreads in the deadstart code... On Thu, Feb 4, 2016 at 8:53 AM, rpela...@archlinux.info wrote: > I believe that doesn't have anything to do with C11 flags. You are just > missing the link to the pthread library. I could be wrong. > > Try and add this to your cmake file: > > find_package (Threads) > > target_link_libraries (myexecutable/lib ${CMAKE_THREAD_LIBS_INIT}) > > > > Sent from my iPhone > > On Feb 4, 2016, at 10:42 AM, Aaron Boxer wrote: > > Hello, > I have a cmake project that uses C++11 threads. > I have added the lines > > set (CMAKE_CXX_STANDARD 14) > set(CMAKE_CXX_STANDARD_REQUIRED ON) > > > CMAKE version is 3.2.2, running on Ubuntu. > > When I try to build, I get the error > > undefined reference to `pthread_create` > > Any ideas on how to fix this? > > Thanks! > Aaron > > -- > > 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 > > > -- > > 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 -- 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
Re: [CMake] undefined reference to 'pthread_create'
I believe that doesn't have anything to do with C11 flags. You are just missing the link to the pthread library. I could be wrong. Try and add this to your cmake file: find_package (Threads) target_link_libraries (myexecutable/lib ${CMAKE_THREAD_LIBS_INIT}) Sent from my iPhone > On Feb 4, 2016, at 10:42 AM, Aaron Boxer wrote: > > Hello, > I have a cmake project that uses C++11 threads. > I have added the lines > > set (CMAKE_CXX_STANDARD 14) > set(CMAKE_CXX_STANDARD_REQUIRED ON) > > > CMAKE version is 3.2.2, running on Ubuntu. > > When I try to build, I get the error > > undefined reference to `pthread_create` > > Any ideas on how to fix this? > > Thanks! > Aaron > -- > > 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 -- 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