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:
> >
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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
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> Please keep messages on-topic and check the CMake FAQ at:
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>
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>
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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
>
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> http://public.kitware.com/mailman/listinfo/cmake
>
>
--
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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:
>
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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
>
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--
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[CMake] undefined reference to 'pthread_create'
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
