C11 Threads on MacOS?

C11 Threads on MacOS?

[Quincey Koziol]

Hi!
	I’m using GCC 9.2 on MacOS 10.14 (Mojave), installed with homebrew.   I can’t get a simple C11 threads program to compile:

#include <stdatomic.h>
#include <stdio.h>
#include <threads.h>

int main()
{
    printf("sizeof(thrd_t)=%u\n", (unsigned)sizeof(thrd_t));
    return(0);
}


	I’m getting this from "gcc-9 -std=c11 -pthread foo.c"

foo.c:3:10: fatal error: threads.h: No such file or directory
    3 | #include <threads.h>
      |          ^~~~~~~~~~~
compilation terminated.


	I see that C11 threads was added to glibc in the 2.28 release, but how do I enable it for my builds?  Is there another homebrew package I should install?

	Thanks,
		Quincey

Re: C11 Threads on MacOS?

[Florian Weimer]

* Quincey Koziol:

> I see that C11 threads was added to glibc in the 2.28 release, but
> how do I enable it for my builds?  Is there another homebrew package
> I should install?

There is no glibc port for MacOS, and there are no plans to create
one.  You have to install GNU/Linux (or GNU/Hurd, but that is still
experimental) in order to use glibc.

Re: C11 Threads on MacOS?

[Quincey Koziol]

Got it, thanks!

> On Nov 3, 2019, at 4:28 AM, Florian Weimer <fw@deneb.enyo.de> wrote:
> 
> * Quincey Koziol:
> 
>> I see that C11 threads was added to glibc in the 2.28 release, but
>> how do I enable it for my builds?  Is there another homebrew package
>> I should install?
> 
> There is no glibc port for MacOS, and there are no plans to create
> one.  You have to install GNU/Linux (or GNU/Hurd, but that is still
> experimental) in order to use glibc.