Clang Goes Ahead And Enables C11 By Default

[phoronix]

Phoronix: Clang Goes Ahead And Enables C11 By Default

LLVM's Clang C/C++ compiler went ahead and enabled C11 as the default C language for the upcoming LLVM 3.6 release...

http://www.phoronix.com/vr.php?view=MTgyMzM

[float]

Have they implemented C11 threads too?

They don't have their own libc so no.

[magika]

Have they implemented C11 threads too?

Yes.
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[san_dehesa]

Have they implemented C11 threads too?

Not that I know. C11 threads and atomics optional headers are not exposed in the recently uncovered Xcode 6 (when compiling in C11); so the clang version they used there doesn't have it. Giving a brief look to the LLVM/Clang mailing list, it doesn't seem as they are working on it. Which is a real pity.

However, the developers in GCC seems to be developing them at a good pace. The only real possibility for using C11 threads right now is under windows and with C libraries such as musl.

[TechMage89]

Yes.
12345chars

That shows C++11 thread support, nothing about C11

[magika]

That shows C++11 thread support, nothing about C11

Whoopsie. (ﾉ≧ڡ≦)

[strcat]

Not that I know. C11 threads and atomics optional headers are not exposed in the recently uncovered Xcode 6 (when compiling in C11); so the clang version they used there doesn't have it. Giving a brief look to the LLVM/Clang mailing list, it doesn't seem as they are working on it. Which is a real pity.

However, the developers in GCC seems to be developing them at a good pace. The only real possibility for using C11 threads right now is under windows and with C libraries such as musl.

Neither Clang and GCC includes an implementation of the C standard library. Both compilers support the C11 / C++11 memory model including the atomic operations. It's not up to them to provide the library features.

[strcat]

That shows C++11 thread support, nothing about C11

Clang implements the language features required for C11 threads like _Thread_local, atomics and the memory model. The rest is up to the C standard library implementation but it's trivial to implement because it's just a subset of POSIX threads.

[Marc Driftmeyer]

Clang implements the language features required for C11 threads like _Thread_local, atomics and the memory model. The rest is up to the C standard library implementation but it's trivial to implement because it's just a subset of POSIX threads.

And clearly a non-exist priority with GLibc.

https://sourceware.org/bugzilla/show_bug.cgi?id=14092

[san_dehesa]

Neither Clang and GCC includes an implementation of the C standard library. Both compilers support the C11 / C++11 memory model including the atomic operations. It's not up to them to provide the library features.

Yes, you are right. Clang and GCC don't have any saying more than implementing the compulsory C11 features; as the keywords _Atomic and _Generic and the memory model.

What I meant with my last line is that the guys at glibc (C library used by Linux) started to implement C11 optional headers (stdatomic.h and thread.h). So hopefully they will have something soon and developers can start using C11 threads in Linux (with the latests gcc compiler).

It is a real pity that the internal C library for OS X and iOS don't implement C11 threads I was looking forwarding using the C11 memory model. It seems pretty sweet.