Jon
> In file included from SkyRenderableInstance.hpp:27,
>                  from SkySceneManager.hpp:38,
>                  from SkySceneManager.cpp:29:
> mat33.hpp:60: warning: friend declaration `Vec3<Type> operator*(const
>    Vec3<Type>&, const Mat33<Type>&)' declares a non-template function
> mat33.hpp:60: warning: (if this is not what you intended, make sure the
>    function template has already been declared and add <> after the function
>    name here) -Wno-non-template-friend disables this warning
> mat33.hpp:64: warning: friend declaration `Mat33<Type> operator*(Type, const
>    Mat44<Type>&)' declares a non-template function
I'd just be taking a blind guess, but it looks like one of those errors
that occurs when upgrading a gcc version (I'm running something archaic
here so I wouldn't know).

Did you try it's advice, regarding about adding <> after the function
name?

I think this should be 

friend Vec3<Type> operator *<> (const Vec3<Type>& V, const Mat33<Type>&
M);




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