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