/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/NSIG_MAX.c -o limits/NSIG_MAX -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic limits/NSIG_MAX.c:3:2: error: "NSIG_MAX is not defined" #error "NSIG_MAX is not defined" ^ 1 error generated.