I don't have access to any win CE system. So I had no chance to test winflexbison there.
If you describe the problem in more details (compilation logs etc.) I will try to fix it.
Or you can make a pull request there - https://github.com/lexxmark/winflexbison
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
It looks like that errno.h is not enough for flex in windows CE.
I don't have access to any win CE system. So I had no chance to test winflexbison there.
If you describe the problem in more details (compilation logs etc.) I will try to fix it.
Or you can make a pull request there - https://github.com/lexxmark/winflexbison