[PATCH] D20461: [LibFuzzer] Fix sending SIGALRM to main thread under Mac OSX

[Kostya Serebryany via llvm-commits]

kcc added a comment.

In http://reviews.llvm.org/D20461#435255, @delcypher wrote:

> @kcc : Just to note I think you already have an implicit pthreads dependency.


Very likely. But it's more like I want to stay away from including pthread.h, if possible. 
And also, the current way of dying on OOMs is less portable than  just dying inside the getrusage thread.

> The CMakeLists.txt file seems to link

>  against it also (side note: why are the flags only being set for the CMake build type being RELEASE?).


For no good reason, feel free to fix that.

> I didn't need to pass `-lpthread` when building (I'm building independently of LLVM's CMake build system) on my system. I suspect that `std::thread` might already be using pthreads internally.


Note that the majority of users use libFuzzer outside of the llvm build system,
will they need to add -lphtread to their build rules?


http://reviews.llvm.org/D20461