无法在gtk3 c程序中连接回调函数fron glade

Question

我正在学习 GTK+ 和 glade。我想制作一个程序，当用户按下减号按钮时，标签号会减少，如果他/她/它按下添加按钮，则标签号应该增加

这是我的 main.c 文件：-

#include <gtk/gtk.h>

long a;
char s[20];

void add(short u)
{
    ++a;
    sprintf(s,"%ld",a);
}

void minus(short u)
{
    --a;
    sprintf(s,"%ld",a);
}

int main (int arg , char *argv[])
{
    gtk_init(&arg,&argv);

    GtkBuilder *builder = gtk_builder_new();
    gtk_builder_add_from_file(builder,"window1.glade",0);

    GtkWidget *win,*num;

    win = GTK_WIDGET(gtk_builder_get_object(builder,"window1"));
    num = GTK_WIDGET(gtk_builder_get_object(builder,"label1"));

    gtk_builder_connect_signals(builder,0);
    gtk_label_set_text(GTK_LABEL(num),s);

    gtk_widget_show_all(win);

    gtk_main();
}

每当我运行这个程序时，我都会在终端中得到关注：-

$

 ./a.out 

(a.out:3796): Gtk-WARNING **: Could not find signal handler 'minus'.  Did you compile with -rdynamic?

(a.out:3796): Gtk-WARNING **: Could not find signal handler 'add'.  Did you compile with -rdynamic?

作为一个完整的菜鸟 O 不知道下一步该做什么

Answer 1

我刚刚用-rdynamic标志编译它并解决了问题

gcc main.c `pkg-config --cflags --libs gtk+-3.0` -rdynamic