Calling an ADA-95 function from a C program

Calling an ADA-95 function from a C program

[Ken Kham]

I am trying to call an ADA-95 function from a main C program.
Can anybody give a step by step explanation about how to do it?
including how to invoke gcc, gnatbind, gnatlink
Yes, I did look at the GNAT User guide on the section
"Binding for Non-Ada main programs"
and did not have any luck.

Basically what I want to do is:
in Main C program:
result := ada_function();

In an ADa packagge, I would have
function ada_function return integer;

Re: Calling an ADA-95 function from a C program

[grave]

Ken Kham wrote:
> 
> 
> In an ADa packagge, I would have
> function ada_function return integer;

Did you add :
pragma Convention(C,ada_function);

After gcc -c my_ada_package.adb you link you C programme with
my_ada_package.o

I think this would function.

Re: Calling an ADA-95 function from a C program

[dewarr]

In article <35ECF33D.62EC@ipnsun5.in2p3.fr>,
  grave <grave@ipnsun5.in2p3.fr> wrote:
> Ken Kham wrote:
> >
> >
> > In an ADa packagge, I would have
> > function ada_function return integer;
>
> Did you add :
> pragma Convention(C,ada_function);
>
> After gcc -c my_ada_package.adb you link you C programme with
> my_ada_package.o
>
> I think this would function.
>


No, this is wrong advice, clearly you want pragma Export here,
not pragma Convention.

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