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