libc: implement threads for libcxx

test.cpp

@@ -1,21 +1,21 @@
 #include <iostream>
 #include <cerrno>
 #include <fcntl.h>
+#include <thread>
 
 int main() {
-    std::vector<int> items;
-    items.push_back(1);
-    items.push_back(2);
-    items.push_back(3);
+    std::cout << "Spawning a thread" << std::endl;
+    std::cout << "Main thread is: " << std::this_thread::get_id() << std::endl;
+    std::cout << "Hardware concurrency: " << std::thread::hardware_concurrency() << std::endl;
 
-    for (const auto &item: items) {
-        std::cout << "Item: " << item << std::endl;
-    }
+    std::thread t1([]() {
+        std::cout << "Hello from a thread!!!" << std::endl;
+        std::cout << "This is thread: " << std::this_thread::get_id() << std::endl;
+    });
 
-    std::cout << "&errno = " << &errno << std::endl;
-    std::cout << "errno = " << errno << std::endl;
-    open("/xxxsaa", 0, 0);
-    std::cout << "errno = " << errno << std::endl;
+    std::cout << "Waiting for a thread" << std::endl;
+    t1.join();
+    std::cout << "Thread finished" << std::endl;
 
     return 0;
 }