GTK3 无法使用 CMake、Glade 和 CLion 找到信号处理程序

Question

当我尝试使用 Clion、CMake 和 Glade 使用以下配置运行 GTK3 时，我收到以下警告：

 Could not find signal handler 'on_dumpButton_clicked'.  Did you compile with -rdynamic?

所以 GTK 找不到我的任何信号处理程序。

CMAKE 设置：

cmake_minimum_required(VERSION 3.28)
project(pg_backer C)

set(CMAKE_C_STANDARD 11)

file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/glade" DESTINATION ${CMAKE_CURRENT_BINARY_DIR})

find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})
add_definitions(${GTK3_CFLAGS_OTHER})

add_executable(pg_backer main.c)
target_link_libraries(pg_backer PUBLIC
        ${GTK3_LIBRARIES}
)

我希望 Glade 构建器链接我的信号处理程序，但警告指出 GTK 无法找到它们，即使它们在我的代码和 Glade 文件中声明也是如此。

Answer 1

使用

-export-deynamic

标志更新 CmakeLists.txt 文件

set(CMAKE_EXE_LINKER_FLAGS "-Wl,-export-dynamic")

您的 CMake 文件不应如下所示：

project(pg_backer C)

set(CMAKE_C_STANDARD 11)
#set(CMAKE_EXE_LINKER_FLAGS "-Wl,-export-dynamic")

file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/glade" DESTINATION ${CMAKE_CURRENT_BINARY_DIR})

find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})
add_definitions(${GTK3_CFLAGS_OTHER})

add_executable(pg_backer main.c)
target_link_libraries(pg_backer PUBLIC
        ${GTK3_LIBRARIES}
)

链接一些小部件并使用构建器获取林间空地文件并将其作为 GTK 对象返回的示例 C 代码：

#include <stdio.h>
#include <gtk/gtk.h>

GtkWidget       *mainWindow;
GtkWidget       *mainWindowFixedContainer;
GtkWidget       *dumpButton;
GtkWidget       *dumpLabel;
GtkBuilder      *builder;

int main(int argc, char *argv[]) {
    printf("Loading PG Backer...\n");
    // Init GTK
    gtk_init(&argc, &argv);
    // Glade setup
    builder = gtk_builder_new_from_file("glade/pg_backer.glade");
    // build gtk widgets
    mainWindow = GTK_WIDGET(gtk_builder_get_object(builder, "mainWindow"));
    mainWindowFixedContainer = GTK_WIDGET(gtk_builder_get_object(builder, "mainWindowFixedContainer"));
    dumpButton = GTK_WIDGET(gtk_builder_get_object(builder, "dumpButton"));
    dumpLabel = GTK_WIDGET(gtk_builder_get_object(builder, "dumpLabel"));
    // window
    g_signal_connect(mainWindow, "destroy", G_CALLBACK(gtk_main_quit), NULL);
    // signals
    gtk_builder_connect_signals(builder, NULL);

    gtk_widget_show(mainWindow);
    // Run app
    gtk_main();

    return EXIT_SUCCESS;
}

void on_dumpButton_clicked(GtkButton  *b)
{
    gtk_label_set_text(GTK_LABEL(dumpLabel), (const gchar*)"Are you sure you want to dump X db from host?");
}