Dev talk:Mingw installation

Without cairomm installed from the gtkmm package, I saw this error:

 $ pkg-config --cflags gtkmm-2.4
 Package cairomm-1.0 was not found in the pkg-config search path.
 Perhaps you should add the directory containing `cairomm-1.0.pc'
 to the PKG_CONFIG_PATH environment variable
 Package 'cairomm-1.0', required by 'gdkmm', not found

so I added cairomm to the list of elements from gtkmm which are needed.