/in/foo.c: In function 'init':
/in/foo.c:42:3: warning: 'gets' is deprecated [-Wdeprecated-declarations]
   gets(s);
   ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccrBXdqJ.o: In function `init':
foo.c:(.text+0x114): warning: the `gets' function is dangerous and should not be used.