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Update note about linking with pthreads (#536)

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Jonathan Wakely 2018-02-21 16:42:16 +00:00 committed by Dominic Hamon
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@ -893,8 +893,11 @@ If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake cach
If you are using clang, you may need to set `LLVMAR_EXECUTABLE`, `LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
## Linking against the library
When using gcc, it is necessary to link against pthread to avoid runtime exceptions.
This is due to how gcc implements std::thread.
When the library is built using GCC it is necessary to link with `-pthread`,
due to how GCC implements `std::thread`.
For GCC 4.x failing to link to pthreads will lead to runtime exceptions, not linker errors.
See [issue #67](https://github.com/google/benchmark/issues/67) for more details.
## Compiler Support