build: FAILED conformance/interfaces/sigqueue/7-1: build: FAILED: Compiler output: conformance/interfaces/sigqueue/7-1.c:58:13: error: use of undeclared identifier 'SIGRTMAX' for (rtsig=SIGRTMAX; rtsig>=SIGRTMIN; rtsig--) { ^ conformance/interfaces/sigqueue/7-1.c:58:30: error: use of undeclared identifier 'SIGRTMIN' for (rtsig=SIGRTMAX; rtsig>=SIGRTMIN; rtsig--) { ^ conformance/interfaces/sigqueue/7-1.c:60:3: warning: implicit declaration of function 'sighold' is invalid in C99 [-Wimplicit-function-declaration] sighold(rtsig); ^ conformance/interfaces/sigqueue/7-1.c:67:13: error: use of undeclared identifier 'SIGRTMAX' for (rtsig=SIGRTMAX; rtsig>=SIGRTMIN; rtsig--) { ^ conformance/interfaces/sigqueue/7-1.c:67:30: error: use of undeclared identifier 'SIGRTMIN' for (rtsig=SIGRTMAX; rtsig>=SIGRTMIN; rtsig--) { ^ conformance/interfaces/sigqueue/7-1.c:69:7: warning: implicit declaration of function 'sigqueue' is invalid in C99 [-Wimplicit-function-declaration] if (sigqueue(pid, rtsig, value) != 0) { ^ 2 warnings and 4 errors generated.