Added a program init function

lib/core/core_linux.q

@@ -0,0 +1,8 @@
+init() {
+	main.main()
+	exit()
+}
+
+exit() {
+	syscall(60, 0)
+}

lib/core/core_mac.q

@@ -0,0 +1,8 @@
+init() {
+	main.main()
+	exit()
+}
+
+exit() {
+	syscall(0x2000001, 0)
+}

lib/core/core_windows.q

@@ -0,0 +1,20 @@
+extern kernel32 {
+	SetConsoleCP(cp UInt)
+	SetConsoleOutputCP(cp UInt)
+	ExitProcess(code UInt)
+}
+
+const cp {
+	utf8 65001
+}
+
+init() {
+	kernel32.SetConsoleCP(cp.utf8)
+	kernel32.SetConsoleOutputCP(cp.utf8)
+	main.main()
+	exit()
+}
+
+exit() {
+	kernel32.ExitProcess(0)
+}

lib/thread/thread_linux.q

@@ -1,3 +1,4 @@
+import core
 import sys
 
 const clone {
@@ -15,7 +16,7 @@ create(func *Any) -> Int {
 	stack := sys.mmap(0, size, 0x1|0x2, 0x02|0x20|0x100|0x20000)
 	stack += size
 	stack -= 8
-	store(stack, 8, _exit)
+	store(stack, 8, core.exit)
 	stack -= 8
 	store(stack, 8, func)
 	return sys.clone(clone.vm|clone.fs|clone.files|clone.sighand|clone.parent|clone.thread|clone.io, stack)