x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/NULL.c -o unistd/NULL -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
unistd/NULL.c:3:2: error: #error "NULL is not defined"
    3 | #error "NULL is not defined"
      |  ^~~~~