LibC: Move even more methods and globals out of crt0.o

Author: https://github.com/ADKaster
Commit: 4cb7c8ea85
Pull-request: https://github.com/SerenityOS/serenity/pull/1048
Reviewed-by: https://github.com/awesomekling ✅

Libraries/LibC/libcinit.cpp

@@ -0,0 +1,34 @@
+#include <AK/Types.h>
+#include <assert.h>
+
+extern "C" {
+
+__thread int errno;
+char** environ;
+bool __environ_is_malloced;
+
+void __libc_init()
+{
+    void __malloc_init();
+    __malloc_init();
+
+    void __stdio_init();
+    __stdio_init();
+}
+
+[[noreturn]] void __cxa_pure_virtual() __attribute__((weak));
+
+[[noreturn]] void __cxa_pure_virtual()
+{
+    ASSERT_NOT_REACHED();
+}
+
+extern u32 __stack_chk_guard;
+u32 __stack_chk_guard = (u32)0xc0000c13;
+
+[[noreturn]] void __stack_chk_fail()
+{
+    ASSERT_NOT_REACHED();
+}
+
+}