libsubid.so shouldn't require symbol Prog

[alexey-tikhonov]

$ grep Prog lib/prototypes.h 
extern /*@observer@*/ const char *Prog;

$ nm -D /usr/lib64/libsubid.so | grep Prog
                 U Prog

This is quite unexpected for applications linking with libsubid: .../lib64/libsubid.so: undefined reference to 'Prog'

[hallyn]

Hm, yes, but that could be painful to undo as it's pretty deeply entrenched. Will need to think if there's a nice way to handle that.

[alexey-tikhonov]

Probably libsubid could define this symbol locally (to some stub value like "shadow-utils:libsubid")?

[hallyn]

I was also thinking of supporting some sort of subid_init("myprog") call (which later might support other configurations... but I doubt people would want to add such a call.

The (deeply entrenched) uses of Prog tend to be in the same places as use of stderr, so I think a generally logging infrastructure might be the best answer to both.