outglob.c: (in function g)
outglob.c:5:20: Undef global x3 used before definition
outglob.c: (in function f)
outglob.c:15:14: Undef global x1 used before definition
outglob.c:15:17: Function returns with global x2 undefined
   outglob.lcl:3: Storage x2 becomes undefined
outglob.c:15:17: Function returns with global x3 undefined
   outglob.lcl:3: Storage x3 becomes undefined
outglob.c:21:10: Undef global x1 used before definition
outglob.c:22:10: Global x2 used by function undefined before call: g
outglob.c:27:10: Undef global x3 used before definition
outglob.c:37:14: Function returns with global x3 undefined
   outglob.c:5:20: Storage x3 defined
outglob.c:41:13: Function returns with global x2 undefined
   outglob.c:1:12: Storage x2 defined
outglob.c:41:13: Function returns with global x3 undefined
   outglob.c:5:20: Storage x3 defined

Finished checking --- 10 code warnings, as expected