This code build successfully but crash at runtime if you compile with gcc/g++ with whatever flags which including -march=armxxx, it will probably crash at runtime at a very high probability.
#include <iostream>
#include <string>
#include <thread>
#include <future>
#include <arm_neon.h>
using namespace std;
void print(string s) { cout << s << endl; }
int main() {
float32x4_t x;
auto _ = std::async(std::launch::async, print, "async works");
thread m(print, "thread works");
cout << "hi" << endl;
m.join();
return 0;
}
The solution on my raspberry pi is do not use -march, instead use-mfloat-abi=hard -mfpu=neon.
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