build: FAILED conformance/interfaces/sigqueue/9-1: build: FAILED: Compiler output: conformance/interfaces/sigqueue/9-1.c:49:12: error: use of undeclared identifier 'SIGRTMIN' sigaction(SIGTOTEST, &act, 0); ^ conformance/interfaces/sigqueue/9-1.c:24:19: note: expanded from macro 'SIGTOTEST' #define SIGTOTEST SIGRTMIN ^ conformance/interfaces/sigqueue/9-1.c:54:2: warning: implicit declaration of function 'sighold' is invalid in C99 [-Wimplicit-function-declaration] sighold(SIGTOTEST); ^ conformance/interfaces/sigqueue/9-1.c:54:10: error: use of undeclared identifier 'SIGRTMIN' sighold(SIGTOTEST); ^ conformance/interfaces/sigqueue/9-1.c:24:19: note: expanded from macro 'SIGTOTEST' #define SIGTOTEST SIGRTMIN ^ conformance/interfaces/sigqueue/9-1.c:68:7: warning: implicit declaration of function 'sigqueue' is invalid in C99 [-Wimplicit-function-declaration] if (sigqueue(pid, SIGTOTEST, value) != 0) { ^ conformance/interfaces/sigqueue/9-1.c:68:21: error: use of undeclared identifier 'SIGRTMIN' if (sigqueue(pid, SIGTOTEST, value) != 0) { ^ conformance/interfaces/sigqueue/9-1.c:24:19: note: expanded from macro 'SIGTOTEST' #define SIGTOTEST SIGRTMIN ^ conformance/interfaces/sigqueue/9-1.c:74:6: warning: implicit declaration of function 'sigqueue' is invalid in C99 [-Wimplicit-function-declaration] if (sigqueue(pid, SIGTOTEST, value) != -1) { ^ conformance/interfaces/sigqueue/9-1.c:74:20: error: use of undeclared identifier 'SIGRTMIN' if (sigqueue(pid, SIGTOTEST, value) != -1) { ^ conformance/interfaces/sigqueue/9-1.c:24:19: note: expanded from macro 'SIGTOTEST' #define SIGTOTEST SIGRTMIN ^ 3 warnings and 4 errors generated.