cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_SC_V7_ILP32_OFF32.c -o unistd/_SC_V7_ILP32_OFF32 -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
unistd/_SC_V7_ILP32_OFF32.c:3:17: error: '_SC_V7_ILP32_OFF32' undeclared here (not in a function)
    3 | int const foo = _SC_V7_ILP32_OFF32;
      |                 ^~~~~~~~~~~~~~~~~~