Build under Windows without a problem.
I have installed MSYS64 – very detailed description eg here:
https://www.devdungeon.com/content/i...ndows-msys2-cc
I typed "make" and a few seconds later I had cssparser.exe running
If the program is to run quite independently, it needs three DLL files:
libgcc_s_seh-1.dll
libstdc++-6.dll
libwinpthread-1.dll
By default dll files are in the C:\msys64\mingw64\bin\ folder