Ensure assert_fail and abort have noreturn attribute

include/bits/stdlib.h

@@ -1,16 +1,14 @@
 #ifndef _BITS_STDLIB_H
 #define _BITS_STDLIB_H
 
-#ifdef __cplusplus
-extern "C" {
+// C++ needs abort to be a function, and cannot use this
+#ifndef __cplusplus
+// Override abort function with detailed abort in C
+#define abort() __abort(__func__, __FILE__, __LINE__)
 #endif
 
 #ifdef __cplusplus
-// C++ needs abort to be a function, define backup function
-void abort(void);
-#else
-// C uses detailed abort macro
-#define abort() __abort(__func__, __FILE__, __LINE__)
+extern "C" {
 #endif
 
 long double strtold(const char *nptr, char **endptr);