harness_ssrate.c: In function 'fpe_handler':
harness_ssrate.c:30:2: warning: implicit declaration of function '_exit' [-Wimplicit-function-declaration]
  _exit(42);
  ^~~~~
harness_ssrate.c:30:2: warning: incompatible implicit declaration of built-in function '_exit'
harness_ssrate.c: In function 'main':
harness_ssrate.c:42:2: warning: implicit declaration of function 'memset' [-Wimplicit-function-declaration]
  memset(&ss, 0, sizeof(ss));
  ^~~~~~
harness_ssrate.c:42:2: warning: incompatible implicit declaration of built-in function 'memset'
harness_ssrate.c:42:2: note: include '<string.h>' or provide a declaration of 'memset'
harness_ssrate.c:22:1:
+#include <string.h>
 
harness_ssrate.c:42:2:
  memset(&ss, 0, sizeof(ss));
  ^~~~~~