cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations dirent/DT_SEM.c -o dirent/DT_SEM -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
dirent/DT_SEM.c:3:2: error: "DT_SEM is not defined"
#error "DT_SEM is not defined"
 ^
1 error generated.