gtkmm 3.0 linking problem.

[John Coppens <john jcoppens com>]

Hello all,

On #include <gtkmm.h>, I get messages indicating a problem in (I
suspect) gdkmm:

In file included from /usr/include/gdkmm-3.0/gdkmm/window.h:37:0,
                 from /usr/include/gdkmm-3.0/gdkmm.h:29,
                 from /usr/include/gtkmm-3.0/gtkmm.h:92,
                 from ../main.cc:11:
/usr/include/gdkmm-3.0/gdkmm/rgba.h: In static member function ‘static Gdk::RGBATraits::CType Gdk::RGBATraits::to_c_type(const Gdk::RGBATraits::CppType&)’:
/usr/include/gdkmm-3.0/gdkmm/rgba.h:220:54: error: return type ‘struct Gdk::RGBATraits::CType’ is incomplete
/usr/include/gdkmm-3.0/gdkmm/rgba.h: In static member function ‘static Gdk::RGBATraits::CType Gdk::RGBATraits::to_c_type(const Gdk::RGBATraits::CType&)’:
/usr/include/gdkmm-3.0/gdkmm/rgba.h:221:54: error: return type ‘struct Gdk::RGBATraits::CType’ is incomplete

gtkmm is version 3.0.1


Looked all over the 'net, no luck...
John