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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Interfacing Ada with C
Date: Sun, 25 Jul 2010 15:26:51 +0100
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Date: 2010-07-25T15:26:51+01:00
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Ada novice <posts@gmx.us> writes:

> I tested under the command prompt:
>
> gcc -c imsl.adb
>
> imsl.adb:3:16: "System" is not visible
> imsl.adb:3:16: non-visible declaration at system.ads:40
> imsl.adb:14:10: missing body for "Internal"
> imsl.adb:16:29: "Address" is not visible (more references follow)
> imsl.adb:16:29: non-visible declaration at system.ads:67
> imsl.adb:17:40: "Null_Address" is not visible
> imsl.adb:17:40: non-visible declaration at system.ads:69
> gnatmake: "imsl.adb" compilation error

Then you need to add
   with System; use System;
to Dmitry's code.

I think Internal will sort itself out when you've fixed the type-related
withs as above.

Personally I'd have called Internal imsl_f_eig_gen if only so I'd
remember what was what! but YMMV.