Linking an ADA routine to a program written in C

[newmans@ncr.disa.mil]

I desperately need an explanation of how to link a routine written and compiled in ADA into a program
written in C.  For example, I built an ada  test procedure hello.a and compiled it using the ada compiler.
The object file produced was called hello01.  This program uses TEST_IO package to do the output.

Since the object module hello01 is ELF-32 bit I linked it in with my C objects using gcc.  But of course,
I get undefined symbols because I have no idea how to tell gcc about the TEST_IO package.  

Does anyone know how this can be done.  

Also, some people have mentioned that I may have to use a PRAGMA in my C code to tell the
compiler that the  routine I am calling  i.e. "hello"  is not a C subroutine.  C passes arguments from
right to left.  I believe ADA probably passes them like PASCAL from left to right.  In C you can declare
a routine to be type pascal to change the calling sequence to match PASCAL's.  If anyone has
any experience calling ADA routines from C please contact me ASAP. 

		Thank you!