I don't suppose anyone has managed to build gtkmm 3 for windows 64 bit, or knows of a good build?
There are around 3-4 links on google where people have tried that, but for various reasons I can't get any of them working. Either the pkg-config files are missing (so I can't compile any programs), or I get incompatible .dll.a style error messages, or the programs just crash.
I have tried building it myself and failed as I don't think I'm experienced enough, and I tried asking on the gtkmm mailing list and nobody replied. There are official win64 installers but only for gtkmm 2.
I realize the original question is 4 years old. gtkmm on Windows can now be easily installed with vcpkg.