Comment 15 for bug 1069172

<off-topic>
Mentioning it here, since AFAICT there is no specific report tracking issues with C++ification:
GTK3 builds on OS X 10.7.4, with GTK+ 3.4.4. as well as GTK+ 3.6.2 fail since r11986:

  CXX widgets/sp-color-slider.o
../../src/widgets/sp-color-slider.cpp: In function ‘gint sp_color_slider_button_press(GtkWidget*, GdkEventButton*)’:
../../src/widgets/sp-color-slider.cpp:312: error: ‘GDK_EVENT’ was not declared in this scope
../../src/widgets/sp-color-slider.cpp: In function ‘gint sp_color_slider_button_release(GtkWidget*, GdkEventButton*)’:
../../src/widgets/sp-color-slider.cpp:339: error: ‘GDK_EVENT’ was not declared in this scope
make[1]: *** [widgets/sp-color-slider.o] Error 1
make: *** [install-exec-recursive] Error 1

</off-topic>