Thanks for your reply.
I followed the instructions in the link you provided and encountered two problems.
First. When I ran
./configure --prefix=/mingw64 --disable-all --enable-clearlooks
it complained
GTK±2.12 is required to compile gtk-engines
Could you please advise me how to install GTK+2.12? I believe I already have gtk2 2.24.28-1 and gtkmm 2.24.4-3 installed. What else do I need here?
Secondly, since I was not able to compile Clearlooks, I skipped that step and downloaded gtk3 branch. However, when I ran the cmake command for RT, it complained
CMake Error: Could not create named generator MSYS Makefiles
Can you also please advise me how to fix this issue?
Thanks!