build: FAILED conformance/interfaces/sigaction/29-1: build: FAILED: Compiler output: conformance/interfaces/sigaction/29-1.c:95:25: error: use of undeclared identifier 'SIGRTMAX' if ( info->si_signo != SIGRTMAX ) ^ conformance/interfaces/sigaction/29-1.c:145:19: error: use of undeclared identifier 'SIGRTMAX' ret = sigaction( SIGRTMAX, &sa, 0 ); ^ conformance/interfaces/sigaction/29-1.c:160:26: error: use of undeclared identifier 'SIGRTMAX' ret = sigaddset( &mask, SIGRTMAX ); ^ conformance/interfaces/sigaction/29-1.c:178:9: warning: implicit declaration of function 'sigqueue' is invalid in C99 [-Wimplicit-function-declaration] ret = sigqueue( getpid(), SIGRTMAX, sv ); ^ conformance/interfaces/sigaction/29-1.c:178:29: error: use of undeclared identifier 'SIGRTMAX' ret = sigqueue( getpid(), SIGRTMAX, sv ); ^ 1 warning and 4 errors generated.