build: FAILED conformance/definitions/time_h/29-1: build: FAILED: Compiler output: conformance/definitions/time_h/29-1.c:16:52: warning: declaration of 'struct sigevent' will not be visible outside of this function [-Wvisibility] typedef int (*timer_create_test)(clockid_t, struct sigevent *, timer_t *); ^ conformance/definitions/time_h/29-1.c:21:13: error: use of undeclared identifier 'timer_create' dummyvar = timer_create; ^ 1 warning and 1 error generated.