FindThreads

This module determines the thread library of the system.

The following variables are set

CMAKE_THREAD_LIBS_INIT     - the thread library
CMAKE_USE_WIN32_THREADS_INIT - using WIN32 threads?
CMAKE_USE_PTHREADS_INIT    - are we using pthreads
CMAKE_HP_PTHREADS_INIT     - are we using hp pthreads

The following import target is created

Threads::Threads

If the use of the -pthread compiler and linker flag is preferred then the caller can set

THREADS_PREFER_PTHREAD_FLAG

The compiler flag can only be used with the imported target. Use of both the imported target as well as this switch is highly recommended for new code.

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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.15/module/FindThreads.html