Gtk 和 gstreamer 链接器错误

Question

我正在尝试从谷歌代码编译简单的GST 播放器。我已经修复并安装了丢失的库，现在我收到链接器错误

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vickey@tb:~/work/gst-player-0.0.0$ make\ngcc -ggdb -Wall -W -Wformat-nonliteral -Wcast-align -Wpointer-arith -Wbad-function-cast -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations -Winline -Wundef -Wnested-externs -Wcast-qual -Wshadow -Wwrite-strings -Wno-unused-parameter -Wfloat-equal -pedantic -ansi -std=c99 `pkg-config --cflags gtk+-2.0` `pkg-config --libs gtk+-2.0` `pkg-config --cflags gstreamer-0.10` `pkg-config --libs gstreamer-0.10` -lgstinterfaces-0.10 ui.c gst-backend.c -o gst-player\nIn file included from /usr/include/gtk-2.0/gtk/gtk.h:236:0,\n                 from ui.c:19:\n/usr/include/gtk-2.0/gtk/gtkitemfactory.h:47:1: warning: function declaration isn\xe2\x80\x99t a prototype [-Wstrict-prototypes]\nui.c: In function \xe2\x80\x98toggle_fullscreen\xe2\x80\x99:\nui.c:60:9: warning: passing argument 1 of \xe2\x80\x98gtk_window_unfullscreen\xe2\x80\x99 from incompatible pointer type [enabled by default]\n/usr/include/gtk-2.0/gtk/gtkwindow.h:340:10: note: expected \xe2\x80\x98struct GtkWindow *\xe2\x80\x99 but argument is of type \xe2\x80\x98struct GtkWidget *\xe2\x80\x99\nui.c:65:9: warning: passing argument 1 of \xe2\x80\x98gtk_window_fullscreen\xe2\x80\x99 from incompatible pointer type [enabled by default]\n/usr/include/gtk-2.0/gtk/gtkwindow.h:339:10: note: expected \xe2\x80\x98struct GtkWindow *\xe2\x80\x99 but argument is of type \xe2\x80\x98struct GtkWidget *\xe2\x80\x99\ngst-backend.c: In function \xe2\x80\x98backend_query_position\xe2\x80\x99:\ngst-backend.c:164:5: warning: pointer targets in passing argument 3 of \xe2\x80\x98gst_element_query_position\xe2\x80\x99 differ in signedness [-Wpointer-sign]\n/usr/include/gstreamer-0.10/gst/gstutils.h:1047:25: note: expected \xe2\x80\x98gint64 *\xe2\x80\x99 but argument is of type \xe2\x80\x98guint64 *\xe2\x80\x99\ngst-backend.c: In function \xe2\x80\x98backend_query_duration\xe2\x80\x99:\ngst-backend.c:177:5: warning: pointer targets in passing argument 3 of \xe2\x80\x98gst_element_query_duration\xe2\x80\x99 differ in signedness [-Wpointer-sign]\n/usr/include/gstreamer-0.10/gst/gstutils.h:1049:25: note: expected \xe2\x80\x98gint64 *\xe2\x80\x99 but argument is of type \xe2\x80\x98guint64 *\xe2\x80\x99\n/tmp/cckH1GSv.o: In function `toggle_paused\':\n/home/vickey/work/gst-player-0.0.0/ui.c:43: undefined reference to `gtk_button_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:43: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:43: undefined reference to `gtk_button_set_label\'\n/home/vickey/work/gst-player-0.0.0/ui.c:49: undefined reference to `gtk_button_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:49: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:49: undefined reference to `gtk_button_set_label\'\n/tmp/cckH1GSv.o: In function `toggle_fullscreen\':\n/home/vickey/work/gst-player-0.0.0/ui.c:60: undefined reference to `gtk_window_unfullscreen\'\n/home/vickey/work/gst-player-0.0.0/ui.c:65: undefined reference to `gtk_window_fullscreen\'\n/tmp/cckH1GSv.o: In function `destroy\':\n/home/vickey/work/gst-player-0.0.0/ui.c:96: undefined reference to `gtk_main_quit\'\n/    tmp/cckH1GSv.o: In function `key_press\':\n/home/vickey/work/gst-player-0.0.0/ui.c:127: undefined reference to `gtk_main_quit\'\n/tmp/cckH1GSv.o: In function `start\':\n/home/vickey/work/gst-player-0.0.0/ui.c:167: undefined reference to `gtk_window_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:169: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:169: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:172: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:172: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:175: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:175: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:178: undefined reference to `gtk_container_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:178: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:178: undefined reference to `gtk_container_set_border_width\'\n/home/vickey/work/gst-player-0.0.0/ui.c:180: undefined reference to `gtk_vbox_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:182: undefined reference to `gtk_container_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:182: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:182: undefined reference to `gtk_container_add\'\n/home/vickey/work/gst-player-0.0.0/ui.c:184: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:186: undefined reference to `gtk_hbox_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:188: undefined reference to `gtk_box_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:188: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:188: undefined reference to `gtk_box_pack_end\'\n/home/vickey/work/gst-player-0.0.0/ui.c:190: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:193: undefined reference to `gtk_drawing_area_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:195: undefined reference to `gtk_box_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:195: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:195: undefined reference to `gtk_box_pack_start\'\n/home/vickey/work/gst-player-0.0.0/ui.c:197: undefined reference to `gtk_widget_set_size_request\'\n/home/vickey/work/gst-player-0.0.0/ui.c:199: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:203: undefined reference to `gtk_button_new_with_label\'\n/home/vickey/work/gst-player-0.0.0/ui.c:205: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:205: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:208: undefined reference to `gtk_box_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:208: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:208: undefined reference to `gtk_box_pack_start\'\n/home/vickey/work/gst-player-0.0.0/ui.c:210: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:216: undefined reference to `gtk_button_new_with_label\'\n/home/vickey/work/gst-player-0.0.0/ui.c:218: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:218: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:221: undefined reference to `gtk_box_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:221: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:221: undefined reference to `gtk_box_pack_start\'\n/home/vickey/work/gst-player-0.0.0/ui.c:223: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:228: undefined reference to `gtk_adjustment_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:229: undefined reference to `gtk_adjustment_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:229: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:229: undefined reference to `gtk_hscale_new\'\n/home/vickey/work/gst-player-0.0.0/ui.c:231: undefined reference to `gtk_box_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:231: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:231: undefined reference to `gtk_box_pack_end\'\n/home/vickey/work/gst-player-0.0.0/ui.c:233: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:233: undefined reference to `g_signal_connect_data\'\n/home/vickey/work/gst-player-0.0.0/ui.c:236: undefined reference to `gtk_widget_show\'\n/home/vickey/work/gst-player-0.0.0/ui.c:239: undefined reference to `gtk_widget_show\'\n/tmp/cckH1GSv.o: In function `init\':\n/    home/vickey/work/gst-player-0.0.0/ui.c:245: undefined reference to `gdk_x11_drawable_get_xid\'\n/tmp/cckH1GSv.o: In function `timeout\':\n/home/vickey/work/gst-player-0.0.0/ui.c:275: undefined reference to `gtk_range_get_type\'\n/home/vickey/work/gst-player-0.0.0/ui.c:275: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/ui.c:275: undefined reference to `gtk_range_set_value\'\n/tmp/cckH1GSv.o: In function `main\':\n/home/vickey/work/gst-player-0.0.0/ui.c:285: undefined reference to `gtk_init\'\n/home/vickey/work/gst-player-0.0.0/ui.c:293: undefined reference to `g_strdup\'\n/home/vickey/work/gst-player-0.0.0/ui.c:295: undefined reference to `g_strdup_printf\'\n/home/vickey/work/gst-player-0.0.0/ui.c:299: undefined reference to `g_idle_add\'\n/home/vickey/work/gst-player-0.0.0/ui.c:300: undefined reference to `g_timeout_add\'\n/home/vickey/work/gst-player-0.0.0/ui.c:302: undefined reference to `gtk_main\'\n/home/vickey/work/gst-player-0.0.0/ui.c:304: undefined reference to `g_free\'\n/tmp/cc9cDvJS.o: In function `bus_cb\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:39: undefined reference to `g_log\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:47: undefined reference to `gst_message_parse_error\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:48: undefined reference to `g_free\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:50: undefined reference to `g_log\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:51: undefined reference to `g_error_free\'\n/tmp/cc9cDvJS.o: In function `backend_init\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:65: undefined reference to `gst_init\'\n/tmp/cc9cDvJS.o: In function `backend_play\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:79: undefined reference to `gst_pipeline_new\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:81: undefined reference to `gst_element_factory_make\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:82: undefined reference to `gst_element_factory_make\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:84: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:84: undefined reference to `g_object_set\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:86: undefined reference to `gst_bin_get_type\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:86: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:86: undefined reference to `gst_bin_add\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:90: undefined reference to `gst_pipeline_get_type\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:90: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:90: undefined reference to `gst_pipeline_get_bus\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:91: undefined reference to `gst_bus_add_watch\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:92: undefined reference to `gst_object_unref\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:95: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:95: undefined reference to `g_object_set\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:97: undefined reference to `gst_x_overlay_get_type\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:97: undefined reference to `gst_implements_interface_check\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:99: undefined reference to `gst_x_overlay_get_type\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:99: undefined reference to `gst_implements_interface_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:99: undefined reference to `gst_x_overlay_set_xwindow_id\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:102: undefined reference to `gst_element_set_state\'\n/tmp/cc9cDvJS.o: In function `backend_stop\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:110: undefined reference to `gst_element_set_state\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:111: undefined reference to `gst_object_get_type\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:111: undefined reference to `g_type_check_instance_cast\'\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:111: undefined reference to `gst_object_unref\'\n/tmp/cc9cDvJS.o: In function `backend_pause\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:119: undefined reference to `gst_element_set_state\'\n/tmp/cc9cDvJS.o: In function `backend_resume\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:125: undefined reference to `gst_element_set_state\'\n/tmp/cc9cDvJS.o: In function `backend_reset\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:131: undefined reference to `gst_element_seek\'\n/tmp/cc9cDvJS.o: In function `backend_seek\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:141: undefined reference to `gst_element_seek\'\n/tmp/cc9cDvJS.o: In function `backend_seek_absolute\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:151: undefined reference to `gst_element_seek\'\n/tmp/cc9cDvJS.o: In function `backend_query_position\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:164: undefined reference to `gst_element_query_position\'\n/tmp/cc9cDvJS.o: In function `backend_query_duration\':\n/home/vickey/work/gst-player-0.0.0/gst-backend.c:177: undefined reference to `gst_element_query_duration\'\ncollect2: ld returned 1 exit status\nmake: *** [gst-player] Error 1\n

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我想我可能缺少一些库导入，但我无法弄清楚。谢谢

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Answer 1

问题很可能是因为链接器在编译中看到库中的任何符号之前不会链接到库，因为源代码出现在编译时链接到库之后。由于链接器在遇到来自源的库中的符号之前不会链接到库，因此您需要在编译命令的开头移动源。目前Makefile源链接中的提供构建如下：

 19 gst-player: ui.c gst-backend.c
 20     $(CC) $(CFLAGS) $(GTK_CFLAGS) $(GTK_LIBS) $(GST_CFLAGS) $(GST_LIBS) $+ -o $@

将其更改为：

 19 gst-player: ui.c gst-backend.c
 20     $(CC) $+ $(CFLAGS) $(GTK_CFLAGS) $(GTK_LIBS) $(GST_CFLAGS) $(GST_LIBS) -o $@

（请注意，现在来源就在 后面$(CC)）。或者，您可以要求链接器链接库，无论使用-Wl, --no-as-needed选项是否遇到库中的符号。在这种情况下，Makefile更改可能如下所示：

 19 gst-player: ui.c gst-backend.c
 20     $(CC) -Wl,--no-as-needed $(CFLAGS) $(GTK_CFLAGS) $(GTK_LIBS) $(GST_CFLAGS) $(GST_LIBS) $+ -o $@  

希望这可以帮助！