make && make install
Scanning dependencies of target decoration
[  0%] Building C object libdecoration/CMakeFiles/decoration.dir/decoration.c.o
Linking C shared library libdecoration.so
[  0%] Built target decoration
[  1%] Generating gwd.schemas
Generating and caching the translation database
Merging translations into /home/devin/sandbox/build/gtk/window-decorator/gwd.schemas.
CREATED /home/devin/sandbox/build/gtk/window-decorator/gwd.schemas
Scanning dependencies of target gtk-window-decorator
[  1%] Building C object gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/gtk-window-decorator.c.o
In file included from /usr/include/metacity/metacity-private/theme.h:26:0,
                 from /home/devin/sandbox/gtk/window-decorator/gtk-window-decorator.h:109,
                 from /home/devin/sandbox/gtk/window-decorator/gtk-window-decorator.c:26:
/usr/include/metacity/metacity-private/gradient.h:38:51: error: unknown type name ‘GdkRGBA’
                                             const GdkRGBA    *from,
                                                   ^
/usr/include/metacity/metacity-private/gradient.h:39:51: error: unknown type name ‘GdkRGBA’
                                             const GdkRGBA    *to,
                                                   ^
/usr/include/metacity/metacity-private/gradient.h:43:51: error: unknown type name ‘GdkRGBA’
                                             const GdkRGBA    *colors,
                                                   ^
/usr/include/metacity/metacity-private/gradient.h:48:51: error: unknown type name ‘GdkRGBA’
                                             const GdkRGBA     colors1[2],
                                                   ^
/usr/include/metacity/metacity-private/gradient.h:50:51: error: unknown type name ‘GdkRGBA’
                                             const GdkRGBA     colors2[2],
                                                   ^
In file included from /home/devin/sandbox/gtk/window-decorator/gtk-window-decorator.h:109:0,
                 from /home/devin/sandbox/gtk/window-decorator/gtk-window-decorator.c:26:
/usr/include/metacity/metacity-private/theme.h:304:7: error: unknown type name ‘GdkRGBA’
       GdkRGBA color;
       ^
/usr/include/metacity/metacity-private/theme.h:308:7: error: unknown type name ‘GtkStateFlags’
       GtkStateFlags state;
       ^
/usr/include/metacity/metacity-private/theme.h:315:7: error: unknown type name ‘GdkRGBA’
       GdkRGBA color;
       ^
/usr/include/metacity/metacity-private/theme.h:321:7: error: unknown type name ‘GdkRGBA’
       GdkRGBA color;
       ^
/usr/include/metacity/metacity-private/theme.h:550:7: error: unknown type name ‘GtkStateFlags’
       GtkStateFlags state;
       ^
/usr/include/metacity/metacity-private/theme.h:562:7: error: unknown type name ‘GtkStateFlags’
       GtkStateFlags state;
       ^
/usr/include/metacity/metacity-private/theme.h:571:7: error: unknown type name ‘GtkStateFlags’
       GtkStateFlags state;
       ^
/usr/include/metacity/metacity-private/theme.h:946:49: error: unknown type name ‘GtkStateFlags’
                                                 GtkStateFlags         state);
                                                 ^
/usr/include/metacity/metacity-private/theme.h:949:49: error: unknown type name ‘GtkStyleContext’
                                                 GtkStyleContext   *style_gtk,
                                                 ^
/usr/include/metacity/metacity-private/theme.h:950:49: error: unknown type name ‘GdkRGBA’
                                                 GdkRGBA           *color);
                                                 ^
/usr/include/metacity/metacity-private/theme.h:960:53: error: unknown type name ‘GtkStyleContext’
                                                     GtkStyleContext      *style_gtk,
                                                     ^
/usr/include/metacity/metacity-private/theme.h:974:46: error: unknown type name ‘GtkStyleContext’
                                              GtkStyleContext        *widget,
                                              ^
/usr/include/metacity/metacity-private/theme.h:1044:40: error: unknown type name ‘GtkStyleContext’
                                        GtkStyleContext        *style_gtk,
                                        ^
/usr/include/metacity/metacity-private/theme.h:1148:1: error: unknown type name ‘GtkStateFlags’
 GtkStateFlags         meta_gtk_state_from_string       (const char            *str);
 ^
/usr/include/metacity/metacity-private/theme.h:1153:57: error: unknown type name ‘GtkStyleContext’
 void                  meta_gtk_style_get_light_color   (GtkStyleContext      *style,
                                                         ^
/usr/include/metacity/metacity-private/theme.h:1154:57: error: unknown type name ‘GtkStateFlags’
                                                         GtkStateFlags         state,
                                                         ^
/usr/include/metacity/metacity-private/theme.h:1155:57: error: unknown type name ‘GdkRGBA’
                                                         GdkRGBA              *color);
                                                         ^
/usr/include/metacity/metacity-private/theme.h:1156:57: error: unknown type name ‘GtkStyleContext’
 void                  meta_gtk_style_get_dark_color    (GtkStyleContext      *style,
                                                         ^
/usr/include/metacity/metacity-private/theme.h:1157:57: error: unknown type name ‘GtkStateFlags’
                                                         GtkStateFlags         state,
                                                         ^
/usr/include/metacity/metacity-private/theme.h:1158:57: error: unknown type name ‘GdkRGBA’
                                                         GdkRGBA              *color);
                                                         ^
gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/build.make:59: recipe for target 'gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/gtk-window-decorator.c.o' failed
make[2]: *** [gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/gtk-window-decorator.c.o] Error 1
CMakeFiles/Makefile2:1846: recipe for target 'gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/all' failed
make[1]: *** [gtk/window-decorator/CMakeFiles/gtk-window-decorator.dir/all] Error 2
Makefile:143: recipe for target 'all' failed
make: *** [all] Error 2