Problem in building Emacs 25.1 on Ubuntu 16.04.1

[Hantang Liu]

Hi everyone. I came across a problem when building emacs-25.1 on Ubuntu 
16.04.1. After successfully running


    ./autogen.sh
    ./configure --with-xwidgets --with-cairo --prefix=$HOME


I run `make` then the following error shows up


    In file included from binary-io.c:3:0:
    binary-io.h: In function ‘set_binary_mode’:
    binary-io.h:57:10: error: ‘O_BINARY’ undeclared (first use in this function)
        return O_BINARY;


I googled around and could not solve it by myself, do you have any ideas? 
Thanks.

--
Hantang Liu