如何连接信号以在 gtk+-3.0 应用程序中处理，在 arch linux 系统上使用glade ang geany ide？

如何解决如何连接信号以在 gtk+-3.0 应用程序中处理，在 arch linux 系统上使用glade ang geany ide？

我尝试使用glade和geany ide来制作简单的应用程序，但无法将glade中设置的信号连接到我的处理程序。我用这个命令来构建：

“简短”版本：

gcc -Wall -w -g `pkg-config --cflags gtk+-3.0 gmodule-2.0 gmodule-export-2.0` -o "%e" "%f" `pkg-config --libs gtk+-3.0 gmodule-2.0 gmodule-export-2.0`

完整命令：

gcc -Wall -w -g -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/lzo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cloudproviders -I/usr/include/atk-1.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/include/at-spi-2.0 -pthread -o "%e" "%f" -lgtk-3 -lgdk-3 -lz -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -Wl,--export-dynamic -lgmodule-2.0 -pthread -lglib-2.0 -lglib-2.0

我的代码（基于俄语教程）：main.cpp

#include <stdio.h> 
#include <gtk/gtk.h>
#include <string.h>
#include <stdlib.h>
#include <libintl.h>
#include <locale.h>
#include <locale>
#include <cstdlib>

//main gtk objects
using namespace std;
/* это тот волшебный объект,который сделает за нас окошко */
GtkBuilder *builder;

/* это виджет окна */
GtkWidget *window;

//function to quit the app without data corruption
void safe_quit (GtkWidget* object,gpointer data)
{
        gtk_main_quit();
}

void click (gtkbutton *button,gpointer label)
{
        /* установить метке текст */
        gtk_label_set_text ((GtkLabel*)label,"Привет,Хабр!");
}

/* создание окна в этот раз мы вынесли в отдельную функцию */
static GtkWidget* create_window (void)
{
        
        /* сюда будем складывать ошибки */
        GError* error = NULL;

        /* тут загружаем файл с интерфейсом */
        builder = gtk_builder_new ();
        
        //gtk_builder_set_translation_domain(builder,"ru");
        if (!gtk_builder_add_from_file (builder,"glade1.glade",&error))
        {
                /* загрузить файл не удалось */
                g_critical ("Не могу загрузить файл: %s",error->message);
                g_error_free (error);
        }

        /* получаем виджет окна,чтобы его показать */
        window = GTK_WIDGET (gtk_builder_get_object (builder,"window"));
        if (window == NULL)
        {
                /* что-то не так,наверное,ошиблись в имени */
                g_critical ("Ошибка при получении виджета окна");
        }
        
        //g_signal_connect(G_OBJECT(window),"destroy",G_CALLBACK(safe_quit),NULL);
        
        /* помните,мы подключали сигналы вручную? теперь это происходит автоматически! */
        gtk_builder_connect_signals (builder,NULL);
        gtk_builder_connect_signals (builder,window);
        g_object_unref (builder);
        return window;
}
int main (int argc,char **argv)
{       
        setlocale(LC_ALL,"");
        auto lang = "";
        bindtextdomain(lang,"./locale");
        textdomain(lang);
        //std::cout << gettext("hello,world!") << std::endl;
        auto _ = gettext;
        printf(_("help"));
        
        /* виджет окна */
        GtkWidget *window;
        /* запускаем GTK+ */
        gtk_init (&argc,&argv);
        
        /* вызываем нашу функцию для создания окна */
        window = create_window();
        
        gtk_widget_show (window);
        gtk_window_set_title (GTK_WINDOW(window),"main");
        /* передаём управление GTK+ */
        gtk_main ();
       // printf("f");
        return 0;
}

我的空地文件：glade1.glade

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.38.2 -->
<interface>
  <requires lib="gtk+" version="3.24"/>
  <object class="Gtkapplicationwindow" id="window">
    <property name="can-focus">False</property>
    <property name="default-width">440</property>
    <property name="default-height">250</property>
    <signal name="destroy" handler="safe_quit" after="yes" swapped="no"/>
    <child>
      <object class="GtkBox" id="Box1">
        <property name="visible">True</property>
        <property name="can-focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkMenuBar">
            <property name="visible">True</property>
            <property name="can-focus">False</property>
            <child>
              <object class="GtkMenuItem">
                <property name="visible">True</property>
                <property name="can-focus">False</property>
                <property name="label" translatable="yes">_File</property>
                <property name="use-underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-new</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-open</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-save</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-save-as</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkSeparatorMenuItem">
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-quit</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem">
                <property name="visible">True</property>
                <property name="can-focus">False</property>
                <property name="label" translatable="yes">_Edit</property>
                <property name="use-underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-cut</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-copy</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-paste</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-delete</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem">
                <property name="visible">True</property>
                <property name="can-focus">False</property>
                <property name="label" translatable="yes">_View</property>
                <property name="use-underline">True</property>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem">
                <property name="visible">True</property>
                <property name="can-focus">False</property>
                <property name="label" translatable="yes">_Help</property>
                <property name="use-underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu">
                    <property name="visible">True</property>
                    <property name="can-focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem">
                        <property name="label">gtk-about</property>
                        <property name="visible">True</property>
                        <property name="can-focus">False</property>
                        <property name="use-underline">True</property>
                        <property name="use-stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkAspectFrame">
            <property name="visible">True</property>
            <property name="can-focus">False</property>
            <property name="label-xalign">0</property>
            <property name="shadow-type">none</property>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
        <child>
          <object class="GtkSeparator">
            <property name="visible">True</property>
            <property name="can-focus">False</property>
            <property name="margin-top">2</property>
            <property name="margin-bottom">2</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">3</property>
          </packing>
        </child>
        <child>
          <object class="GtkBox">
            <property name="visible">True</property>
            <property name="can-focus">False</property>
            <child>
              <object class="GtkLabel">
                <property name="visible">True</property>
                <property name="can-focus">False</property>
                <property name="label" translatable="yes">status: normal</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="gtkbutton">
                <property name="label" translatable="yes">button</property>
                <property name="visible">True</property>
                <property name="can-focus">True</property>
                <property name="receives-default">True</property>
                <signal name="clicked" handler="click" object="__glade_unnamed_23" swapped="no"/>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">1</property>
              </packing>
            </child>
            <child>
              <placeholder/>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">4</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

当我尝试启动我的应用时，我总是收到这 3 条消息：

(main:32570): Gtk-WARNING **: 17:41:09.237: 找不到信号处理程序“safe_quit”。你是用 -rdynamic 编译的吗？

(main:32570): Gtk-WARNING **: 17:41:09.237: 无法在单击对象 ___object_24 的信号时查找对象 __glade_unnamed_23

(main:32570): Gtk-WARNING **: 17:41:09.237: 找不到信号处理程序“click”。你是用 -rdynamic 编译的吗？

我在 stackoverflow 上阅读了很多相同的问题，但没有任何帮助。我更改了处理程序参数、名称、添加静态和 G_MODULE_EXPORT，但所有这些都不起作用。

在 this site 上，我发现“在 Linux 和 Unices 上，这不是必需的 (G_MODULE_EXPORT)；应用程序应该使用 -Wl,--export-dynamic CFLAGS 进行编译，并链接到 gmodule-export- 2.0。”但是我的应用程序是用 -Wl 和 --export-dynamic 编译的！！！我做错了什么？？？请任何知道答案或有同样问题的人帮助我找到任何可能成为解决方案的东西。

抱歉我的英语不好，感谢您的关注...

附言（找到某种解决方案）：

gtk_builder_add_callback_symbol(builder,"safe_quit",G_CALLBACK(safe_quit));
gtk_builder_add_callback_symbol(builder,"click",G_CALLBACK(click));
gtk_builder_connect_signals (builder,NULL);

是否有任何解决方案如何在不使用 gtk_builder_add_callback_symbol 的情况下连接处理程序？我的意思是 gtk_builder_connect_signals 用于自动连接信号以处理使用 GModule 在应用程序的符号表中查找，那么我的应用程序符号表有什么问题不能自动连接信号？

解决方法

我不得不自己编译你的源代码，但似乎你在程序中混合了 C 和 C++ 语句，这导致 GCC 将它编译为 C++ 文件，就像你使用 {{ 1}} 而不是 gcc。 编辑：实际上它会因为您将文件命名为：“main .cpp”。

反过来，C++ 会修饰函数原型，以便您可以选择重载它们，这将使纯 C 库无法在运行时找到它们。

将您的信号头原型包含在 g++ 块中似乎有帮助：

extern "C"