cc -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_POSIX2_SYMLINKS.c -o unistd/_POSIX2_SYMLINKS -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic unistd/_POSIX2_SYMLINKS.c:3:17: error: ‘_POSIX2_SYMLINKS’ undeclared here (not in a function); did you mean ‘_PC_2_SYMLINKS’? 3 | int const foo = _POSIX2_SYMLINKS; | ^~~~~~~~~~~~~~~~ | _PC_2_SYMLINKS