Cant compile structs with timespec from musl libc

[maringuu]

Hello,
I'm not sure where to report this but I think the error is in zig and not in musl.
I currently can't test with glibc but it worked a week ago before I switched to musl.

I can't compile (with the 0.6 and master versions of zig) the following:

main.zig

const c = @cImport({
    @cInclude("crash.h");
});

pub fn main() void {
    const foobar: c.foo = undefined;
}

crash.h

#ifndef _CRASH_H
#define _CRASH_H

#include <time.h>

struct foo {
	struct timespec bar;
};

#endif

When compiling with zig build-exe -lc -I. main.zig I get the following error messages:

zig-cache/o/1QBKyqQD7kLHJlhoCNMXT5wbPCc96MtwERrm4GmtTO75FIB9OM9P-TaGnN0SK1St/cimport.zig:63:5: error: opaque types have unknown size and therefore cannot be directly embedded in structs
    bar: struct_timespec,
    ^
./main.zig:6:27: note: referenced here
    const foobar: c.foo = undefined;

The c equivalent of this code compiles fine
main.c

#include "crash.h"

int main() {
    struct foo foo;
}

[tadeokondrak]

This is #1499.

[maringuu]

Thank you!