Re: [Vala] glade, symbol not found.

[Sam Liddicott <sam liddicott com>]

Thanks, Trevor.

Sam

-----Original Message-----
From: Travis Watkins <amaranth ubuntu com>
Sent: 16 June 2008 17:07
To: Sam Liddicott <sam liddicott com>
Cc: vala-list gnome org
Subject: Re: [Vala] glade, symbol not found.

On Mon, Jun 16, 2008 at 10:11 AM, Sam Liddicott <sam liddicott com> wrote:
> I've imported the vala glade example from the wiki into a project build
> using vala-gen-project.
> I in configure.ac I had to add:
> GLADE_REQUIRED=2.6.0
> and
> libglade-2.0 >= $GLADE_REQUIRED
>
> to
> PKG_CHECK_MODULES(PHONEUI, glib-2.0 >= $GLIB_REQUIRED gobject-2.0 >=
> $GLIB_REQUIRED gtk+-2.0 >= $GTK_REQUIRED)
>
>
> It builds fine now, but when I run the application, the connect_signals
> fails:
>
> sam lazarus:~/projects/vala/phoneui$ ./phoneui
> Symbol not found: activate => glade_phone_ui_on_bHelloWorld_clicked
>
> sam lazarus:~/projects/vala/phoneui$ nm -s ./phoneui | grep
> glade_phone_ui_on_bHelloWorld_clicked
> 080491b0 T glade_phone_ui_on_bHelloWorld_clicked
>
> However if I build in one step using a command line based on the glade
> example:
> $ valac --pkg gtk+-2.0 --pkg libglade-2.0 --pkg gmodule-2.0 -o demo
> mainwindow.vala -X "-Wl,--export-dynamic -rdynamic"
> then it works fine; also:
>
> sam lazarus:~/projects/vala/phoneui/src$ nm -s ./demo | grep
> glade_phone_ui_on_bHelloWorld_clicked
> 08048ea4 T glade_phone_ui_on_bHelloWorld_clicked
>
> ...so the symbol seems just as valid...
>
> I guess the:
> "-Wl,--export-dynamic -rdynamic"
> has something to do with it, if I add it to the build line, like this:
> sam lazarus:~/projects/vala/phoneui$ gcc -g -O2 -Wl,--export-dynamic
> -rdynamic -o phoneui src/mainwindow.o  /usr/lib/libglade-2.0.so
> /usr/lib/libgtk-x11-2.0.so /usr/lib/libxml2.so /usr/lib/libgdk-x11-2.0.so
> /usr/lib/libatk-1.0.so /usr/lib/libgdk_pixbuf-2.0.so -lm
> /usr/lib/libpangocairo-1.0.so /usr/lib/libpango-1.0.so /usr/lib/libcairo.so
> /usr/lib/libgobject-2.0.so /usr/lib/libgmodule-2.0.so -ldl
> /usr/lib/libglib-2.0.so
>
> then it works, so it should probably mean a changed needed in
> vala-gen-project to put this as C flags configure.ac or Makefile.am or
> something (I guess).
> I've not managed to work out where.
>
> Sam

You need to add the following to your Makefile.am:

phoneui_LDFLAGS = \
        -Wl,-export-dynamic \
        $(NULL)

I'm guessing phoneui is the right prefix anyway.

-- 
Travis Watkins
http://www.realistanew.com