Fix abort definition for C++

src/c/stdlib.c

@@ -8,7 +8,7 @@ long double strtold(const char *nptr, char **endptr) {
 void __abort(const char *func, const char *file, int line);
 
 // backup definition of abort for programs that link it directly
-void abort() {
+void abort(void) {
     // call detailed abort function
     __abort(__func__, __FILE__, __LINE__);
 }