[AWS] gnatlink fails with aws hello world example on debian 4.0

[Ludovic Brenta]

Selon Andreas Schipplock:
> Hi,
> I'm using Debian 4.0 "Etch" and I installed the following packages:
> gnat and libaws-dev
> 
> Consider the following example that I copied from the documentation:
> http://pastie.org/329687
> I created the following project file "default.gpr":
> http://pastie.org/329693
> I am compiling this with: "gnatmake -Pdefault.gpr"
> I am getting the following gnatlink error: http://pastie.org/329697
> 
> If I compile a simple hello world, it's working just fine as expected:
> http://pastie.org/329688
> 
> I have no idea what's going wrong here. If you could give me a hand, I
> would be happy :).

It looks like gnatmake forgets to link your program with
/usr/lib/libaws.so.

Theoretically, this is how it should work: your project file does a "with
"aws"" which loads /usr/share/ada/adainclude/aws.gpr. This file contains
a stanza like this:

package Linker is
   for Default_Switches ("Ada") use ("-laws");
end Linker;

which causes gnatmake to link your program with /usr/lib/libaws.so
(provided by package libaws-dev), which is a symbolic link to
/usr/lib/libaws.so.2.2 (provided by package libaws2.2), which is the real
shared library.

Apparently, this scenario is broken somewhere on your machine. Please make
sure:

- which aws.gpr you actually use (e.g. "gnat ls -v -Pdefault.gpr")
- that both packages libaws-dev and libaws2.2 are installed
- that both the symbolic link and the shared library are present

Also, the output of "gnatmake -v -Pdefault.gpr" might be useful.

HTH

-- 
Ludovic Brenta.