Re: I do not understand this error...

[John Smith <yoursurrogategod@gmail.com>]

On Sunday, February 7, 2016 at 11:41:51 PM UTC-5, Jeffrey R. Carter wrote:
> On 02/07/2016 08:51 PM, John Smith wrote:
> > 
> > Stupid question.  What do you mean by a library-level package?  Is this just
> > a regular package that has these callbacks declared and I just include it in
> > my application?
> 
> "Library-level" means not nested in anything else.
> 
> [Technically, nested directly in Standard, since all compilation units are
> considered nested directly in Standard. Standard is usually not mentioned
> explicitly, though, so this may be confusing to a beginner.]
> 
> -- 
> Jeff Carter
> "I'm a lumberjack and I'm OK."
> Monty Python's Flying Circus
> 54

How does that look like?

I tried to "with" the following package:
http://pastebin.com/ghd6kjZP

But I got the following errors:
$ gprbuild
using project file gtk_hello_world.gpr
gcc -c -g -gnatwa gtk_hello_world.adb
gtk_hello_world.adb:22:26: warning: formal parameter "Widget" is not referenced
gtk_hello_world.adb:28:22: warning: formal parameter "Widget" is not referenced
gtk_hello_world.adb:38:03: "Return_Handlers" is not visible
gtk_hello_world.adb:38:03: non-visible declaration at handler_package.ads:11
gtk_hello_world.adb:39:03: "Handlers" is not visible
gtk_hello_world.adb:39:03: non-visible declaration at handler_package.ads:10
gtk_hello_world.adb:39:03: non-visible declaration at gtk-handlers.ads:181
gprbuild: *** compilation phase failed