New API change. Now you can build cairo by using visual studio solution. You only need to change props files for your projects. For now you need to manually build all libs before using cairo in windows.
Run IPlug-Youlean\YCAIRO\Cairo_Graphics\projects\cairo.sln
Change 14 line in .props from
<ADDITIONAL_INCLUDES>$(ProjectDir)\..\..\..\MyDSP\ ;..\..\YCAIRO\;..\..\YCAIRO\Cairo_Graphics\Include-Win\cairo;..\..\YCAIRO\Cairo_Graphics\Include-Win;</ADDITIONAL_INCLUDES>
to
<ADDITIONAL_INCLUDES>$(ProjectDir)\..\..\..\MyDSP\ ;..\..\YCAIRO\;..\..\YCAIRO\Cairo_Graphics\cairo\s rc\;..\..\YCAIRO\Cairo_Graphics\freetype\include\; ..\..\YCAIRO\Cairo_Graphics\projects\cairo\src\;</ADDITIONAL_INCLUDES>