[CMake] undefined reference to 'pthread_create'

[Aaron Boxer]

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
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