Problem compiling simple Ada program

[Michael Swanson]

I am trying to compile and link a simple Ada program on Cygwin.  The 
code for this looks like:
Hello.adb:

with Text_IO;

Procedure Hello is
begin
	Text_IO.Put_Line("Hello");
end;

This compiles fine, but when I try to link the hello.o file, I get this 
error:
hello.o:hello.adb:(.text+0x18): undefined reference to 
'_ada__text_io__put_line__2'
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../libcygwin.a(libvmain.o):: 
undefined reference to '_WinMain@16'
collect2: ld returned 1 exit status

This looks like I don't have the right libraries for Ada, but I have 
installed the entire Devel and Lib group in Cygwin.  Is there a simple 
solution to this?  Thanks ahead of time for any help you can give me.

Mike Swanson