$ make
make  all-recursive
make[1]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel'
Making all in libxfce4panel
make[2]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel/libxfce4panel'
  GEN      libxfce4panel-enum-types.h
  GEN      libxfce4panel-alias.h
  GEN      libxfce4panel-aliasdef.c
  GEN      libxfce4panel-enum-types.c
  GEN      libxfce4panel-marshal.c
  GEN      libxfce4panel-marshal.h
make  all-am
make[3]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel/libxfce4panel'
  CC       libxfce4panel_1_0_la-libxfce4panel-aliasdef.lo
  CC       libxfce4panel_1_0_la-libxfce4panel-enum-types.lo
  CC       libxfce4panel_1_0_la-libxfce4panel-marshal.lo
  CC       libxfce4panel_1_0_la-libxfce4panel-config.lo
  CC       libxfce4panel_1_0_la-xfce-arrow-button.lo
  CC       libxfce4panel_1_0_la-xfce-hvbox.lo
  CC       libxfce4panel_1_0_la-xfce-panel-convenience.lo
  CC       libxfce4panel_1_0_la-xfce-panel-plugin.lo
  CC       libxfce4panel_1_0_la-xfce-panel-plugin-provider.lo
  CC       libxfce4panel_1_0_la-xfce-panel-image.lo
  CCLD     libxfce4panel-1.0.la
Creating library file: .libs/libxfce4panel-1.0.dll.a
make[3]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel/libxfce4panel'
make[2]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel/libxfce4panel'
Making all in common
make[2]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel/common'
  CC       libpanel_common_la-panel-debug.lo
  CC       libpanel_common_la-panel-utils.lo
  CC       libpanel_common_la-panel-xfconf.lo
  CCLD     libpanel-common.la
make[2]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel/common'
Making all in panel
make[2]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel/panel'
  GEN      panel-dbus-service-infos.h
  GEN      panel-dbus-client-infos.h
  GEN      panel-marshal.c
  GEN      panel-marshal.h
  GEN      panel-plugin-external-wrapper-infos.h
  GEN      panel-preferences-dialog-ui.h
make  all-am
make[3]: Entering directory `/home/jphustman/src/xfce/git/xfce4-panel/panel'
  CC       xfce4_panel-panel-marshal.o
  CC       xfce4_panel-main.o
  CC       xfce4_panel-panel-application.o
  CC       xfce4_panel-panel-base-window.o
  CC       xfce4_panel-panel-dbus-client.o
  CC       xfce4_panel-panel-dbus-service.o
  CC       xfce4_panel-panel-dialogs.o
  CC       xfce4_panel-panel-item-dialog.o
  CC       xfce4_panel-panel-itembar.o
  CC       xfce4_panel-panel-module.o
  CC       xfce4_panel-panel-module-factory.o
  CC       xfce4_panel-panel-plugin-external.o
  CC       xfce4_panel-panel-plugin-external-wrapper.o
panel-plugin-external-wrapper.c: In function ‘panel_plugin_external_wrapper_set_properties’:
panel-plugin-external-wrapper.c:274:5: warning: ‘g_value_array_free’ is deprecated (declared at /usr/include/glib-2.0/gobject/gvaluearray.h:72): Use 'g_array_unref' instead
  CC       xfce4_panel-panel-plugin-external-46.o
  CC       xfce4_panel-panel-preferences-dialog.o
  CC       xfce4_panel-panel-tic-tac-toe.o
  CC       xfce4_panel-panel-window.o
  CCLD     xfce4-panel.exe
../common/.libs/libpanel-common.a(libpanel_common_la-panel-xfconf.o): In function `panel_properties_get_channel':
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-xfconf.c:102: undefined reference to `_xfce_panel_get_channel_name'
../common/.libs/libpanel-common.a(libpanel_common_la-panel-utils.o): In function `panel_utils_builder_new':
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:62: undefined reference to `_xfce_panel_plugin_get_type'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:72: undefined reference to `_xfce_panel_plugin_take_window'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:74: undefined reference to `_xfce_panel_plugin_block_menu'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:75: undefined reference to `_xfce_panel_plugin_unblock_menu'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:100: undefined reference to `_xfce_panel_plugin_get_unique_id'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:100: undefined reference to `_xfce_panel_plugin_get_name'
../common/.libs/libpanel-common.a(libpanel_common_la-panel-utils.o): In function `panel_utils_help_button_clicked':
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:41: undefined reference to `_xfce_panel_plugin_get_type'
/home/jphustman/src/xfce/git/xfce4-panel/common/panel-utils.c:45: undefined reference to `_xfce_panel_plugin_get_name'
collect2: ld returned 1 exit status
Makefile:549: recipe for target `xfce4-panel.exe' failed
make[3]: *** [xfce4-panel.exe] Error 1
make[3]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel/panel'
Makefile:468: recipe for target `all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel/panel'
Makefile:528: recipe for target `all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jphustman/src/xfce/git/xfce4-panel'
Makefile:438: recipe for target `all' failed
make: *** [all] Error 2