gcc -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations dirent/DT_BLK.c -o dirent/DT_BLK -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic dirent/DT_BLK.c:3:2: error: #error "DT_BLK is not defined" 3 | #error "DT_BLK is not defined" | ^~~~~