cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_mman/posix_madvise.c -o sys_mman/posix_madvise -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
sys_mman/posix_madvise.c:6:35: error: ‘posix_madvise’ undeclared here (not in a function)
    6 | int (*foo)(void *, size_t, int) = posix_madvise;
      |                                   ^~~~~~~~~~~~~