-You can build OpenOCD for Windows natively with either MinGW/MSYS or
-Cygwin. Alternatively, one can cross-compile it using MinGW on a *nix
+You can build OpenOCD for Windows natively with either MinGW-w64/MSYS
+or Cygwin (plain MinGW might work with --disable-werror but is not
+recommended as it doesn't provide enough C99 compatibility).
+Alternatively, one can cross-compile it using MinGW-w64 on a *nix