Move string printing to runtime

runtime/runtime.c

@@ -0,0 +1,30 @@
+
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include "runtime.h"
+
+void __go_printstring(char *str) {
+	write(STDOUT_FILENO, str, strlen(str));
+}
+
+void __go_printspace() {
+	write(STDOUT_FILENO, " ", 1);
+}
+
+void __go_printnl() {
+	write(STDOUT_FILENO, "\n", 1);
+}
+
+void go_main() __asm__("main.main");
+
+void __go_runtime_main() {
+	go_main();
+}
+
+__attribute__((weak))
+int main() {
+	__go_runtime_main();
+
+	return 0;
+}