GCC8: linking std::async fails

[capehill]

Testing new toys. A simple thread creation compiles, links and works. Std::async didn't:

#include <thread>
#include <future>

#include <cstdio>
#include <unistd.h>

int thread()
{
	printf("Hello from thread\n");
	return 0;
}

int main()
{
	//std::thread t(thread);
	auto fut = std::async(thread);

	printf("Hello from main\n");
	
	usleep(100000);	
	return 0;
}

g++ thread.cpp -athread=native

/Code/adtools-os4-8-20180519-611/bin/../lib/gcc/ppc-amigaos/8.1.0/../../../libstdc++.a(condition_variable.o): In function std::condition_variable::~condition_variable()': /var/lib/jenkins/workspace/native-gcc-8/gcc/repo/libstdc++-v3/src/c++11/condition_variable.cc:46: undefined reference to __gthread_cond_destroy'

[sba1]

I added that stub. A new version should appear in some hours.

[capehill]

-617 worked. Thanks!