RE: Callbacks when glade file is loaded using a dynamic library

[dfg dfg <abxccd msn com>]

Thank you Tristan.

 

I actually tried the --export-dynamic flag before posting, but could not get it to work. I feel that it is 
most likely a problem in my makefile.am (I am using automake and libtool to generate the makefiles).

 

Here is the make file for the compilation of the dynamic library:

 

libmyplugin= /
libmyplugin_LTLIBRARIES=libmyplugin.la
libmyplugin_la_SOURCES=libmyplugin.c libmyplugincallbacks.c
include_HEADERS = libmyplugincallbacks.h
libmyplugin_la_LDFLAGS= -lc -lgcc -avoid-version @PACKAGE_LDFLAGS@
libmyplugin_la_LIBDADD = --export-dynamic @PACKAGE_LIBS@
INCLUDES = @PACKAGE_CFLAGS@

 

Here is my configure.ac

 

AC_PREREQ(2.59)
AC_INIT(myapp, 1.0)

PKG_CHECK_MODULES(GTK, gtk+-2.0 gmodule-2.0 gmodule-export-2.0)

PACKAGE_CFLAGS="-g -Wall $GTK_CFLAGS"
PACKAGE_LIBS="-g $GTK_LIBS -ltar"
PACKAGE_LDFLAGS="-Wl, --export-dynamic $GTK_LDFLAGS"

AC_SUBST(PACKAGE_CFLAGS)
AC_SUBST(PACKAGE_LIBS)
AC_SUBST(PACKAGE_LDFLAGS)
AM_PROG_LIBTOOL

AC_CANONICAL_SYSTEM
AM_INIT_AUTOMAKE()

AC_PROG_CC

AC_CONFIG_FILES(Makefile src/Makefile src/modules/Makefile src/modules/libmyplugin/Makefile)
AC_OUTPUT


For some reason though, callbacks in "myapp" the main app that loads in the .so files work fine. Any ideas 
appreciated. :)

 


 
> Date: Thu, 22 Apr 2010 21:37:48 -0400
> Subject: Re: Callbacks when glade file is loaded using a dynamic library
> From: tvb gnome org
> To: abxccd msn com
> CC: gtk-app-devel-list gnome org
>
> On Thu, Apr 22, 2010 at 7:21 PM, dfg dfg <abxccd msn com> wrote:
> > Hi everyone,
> >
> > Currently, I have built my main application using glade. This file is then loaded by a C application.
> >
> > I then created another interface using Glade. When my main application loads, it loads a .so library 
> > which contains code for this subsection (kind of like a plugin).
> >
> > The .so file loads in the second glade file and attaches it into the interface of the main application. 
> > This all works problem.
> >
> > The problem I am facing now is that gtk_builder_connect_signals (builder, NULL); does not work.
> >
> > For my .so file, i have 3 files:
> >
> >   -libmyplugin.c
> >   -libmyplugincallbacks.h
> >   -libmyplugincallbacks.c
> >
> >
> > My code for the libmyplugin.c file looks like this:
> >
> >   #include <stdlib.h>
> >   #include <gtk/gtk.h>
> >   #include "libmyplugincallbacks.h"
> >
> >   #define GUI "libmyplugingui.ui"
> >   int startplugin(){
> >      extern *mainBuilder;
> >      GtkBuilder *subbuilder;
> >
> >      //Do things like attach the glade file into the main glade file.
> >      gtk_builder_connect_signals (builder, NULL);
> >
> >   }
> >
> >
> >
> > My libmyplugincallbacks.h
> >
> >   #include <gtk/gtk.h>
> >
> >   void myfunc (GtkCellRenderer *cell, GtkCellEditable *editable, const gchar *path, gpointer data);
> >
> >
> >
> > My libplugincallbacks.c
> >
> >   #ifdef HAVE_CONFIG_H
> >   #  include <config.h>
> >   #endif
> >
> >   #include "libmyplugincallbacks.h"
> >   #include <string.h>
> >
> >   void myfunc(GtkCellRenderer *cell, GtkCellEditable *editable, const gchar *path, gpointer data){
> >     if (GTK_IS_ENTRY (editable))
> >       {
> >       //Do stuff
> >       }
> >   }
> >
> >
> >
> > When I compile my program, the .so file compiles properly. However, when ever I run the program, it loads 
> > the .so file. Once GTK builder gets to the stage where it connects the signals, it will complain that 
> > "myfunc" cannot be found. I have double checked the name of the function in my glade file and it is spelt 
> > and entered correctly.
>
> You generally need to export your symbols by linking the app with
> --export-dynamic flag:
>
> pkg-config --libs gmodule-2.0
>
> Should do the right thing to make your symbols visible.
>
> Cheers,
> -Tristan
                                          
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