我正在尝试使用gnat pro作为使用arm-eabi工具链的交叉编译器，但它无法识别任何Ada包!!
这是编译结果：
5:6 "ada.calendar" is not a predefined library unit
2:6 "ada.direct_io" is not a predefined library unit
8:6 "ada.float_text_io" is not a predefined library unit
7:6 "ada.integer_text_io" is not a predefined library unit
10:6 "ada.numerics" is not a predefined library unit
2:6 "ada.text_io" is not a predefined library unit
2:6 "bmp (spec)" depends on "ada.direct_io (spec)"
2:6 "bmp (spec)" depends on "ada.text_io (spec)"
3:6 "serial_net (spec)" depends on "gnat.sockets (spec)"
2:6 "stream (body)" depends on "bmp (spec)"
3:6 "stream (body)" depends on "serial_net (spec)"
3:6 file "g-socket.ads" not found