cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/WIFEXITED.c -o stdlib/WIFEXITED -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
stdlib/WIFEXITED.c:2:17: error: ‘WIFEXITED’ undeclared here (not in a function)
    2 | int const foo = WIFEXITED;
      |                 ^~~~~~~~~