[PATCH] [BZ #18970]: Reference of pthread_setcancelstate in libc.a

[Roland McGrath]

> Is this a valid test?

No.  There should be no need for individual tests like that.  The
linknamespace tests should catch such things if the conform data is correct
(and if it's not, the right thing is to fix the conform data).

AFAIK fmtmsg is only specified in standards that put all POSIX.1 symbols
(including pthread_setcancelstate) in the implementation name space.