/in/foo.c: In function 's':
/in/foo.c:14:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'r':
/in/foo.c:27:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'c':
/in/foo.c:40:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'x':
/in/foo.c:53:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'll':
/in/foo.c:66:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^