patch 7.4.1402
Problem: GTK 3 is not supported.
Solution: Add GTK 3 support. (Kazunobu Kuriyama)
diff --git a/src/gui.h b/src/gui.h
index d026664..f119de5 100644
--- a/src/gui.h
+++ b/src/gui.h
@@ -359,7 +359,9 @@
#endif
#ifdef FEAT_GUI_GTK
+# ifndef USE_GTK3
int visibility; /* Is shell partially/fully obscured? */
+# endif
GdkCursor *blank_pointer; /* Blank pointer */
/* X Resources */
@@ -381,7 +383,12 @@
GdkColor *fgcolor; /* GDK-styled foreground color */
GdkColor *bgcolor; /* GDK-styled background color */
GdkColor *spcolor; /* GDK-styled special color */
+# ifdef USE_GTK3
+ cairo_surface_t *surface; /* drawarea surface */
+ gboolean by_signal; /* cause of draw operation */
+# else
GdkGC *text_gc; /* cached GC for normal text */
+# endif
PangoContext *text_context; /* the context used for all text */
PangoFont *ascii_font; /* cached font for ASCII strings */
PangoGlyphString *ascii_glyphs; /* cached code point -> glyph map */