Re: [Gchemutils-main] File format for gcrystal

[Daniel Leidert]

Am Dienstag, den 11.03.2008, 07:20 +0100 schrieb Jack Malmostoso:
> On Mon, 2008-03-10 at 22:10 +0100, Jean Bréfort wrote:

[..]
> > I have no idea why the linker fails on
> > gnome_authentication_manager_init, libgnomeui has this symbol:
> > 
> > objdump -T /usr/lib/libgnomeui-2.so|grep authentication_manager_init
> > 000000000006ad30 g  DF .text        0000000000000136  Base        
> > gnome_authentication_manager_init
> 
> Well, for one the code in programs/paint/main.cc does not include
> libgnomeui.h, so I guess that must be a reason why it complains about
> it.

No. Then it would complain about an implicit declaration. It fails at
linking step, because no library contains the function. And that's true,
because the code is not linked against libgnomeui.

> I have added the include:
> 
> #include <libgnomeui/libgnomeui.h>
> 
> but it still refuses to compile by saying that it conflicts with the C
> binding, while this is C++. Is this related to the first lines:
> 
> extern "C" {
>         void gnome_authentication_manager_init ();
> }
> 
> Should it be extern "C++" or something similar?

No, this is correct. gnome_authentication_manager_init is a C function.

> As you might have understood I am not a programmer so I am going with
> common sense, but I can't seem to figure it out.
> I assume you can compile gnome-chemistry-utils-0.9.2 out of the box?

The problem is, that it doesn't link against libgnomeui. You can edit
configure.ac. There search for REQUIREMENTS=. Put the following line
into this "listing:

libgnomeui-2.0 >= 2.6.0 \

(note the ending backslash!). Then save your change and run autoreconf.
Now configure and compile.

Regards, Daniel