I want to make a videogame using a proprietary license. It would utilize the SDL library and POSIX. From my understanding, every modern platform uses POSIX except for Windows. To fix this, when building for Windows, I want to link with Cygwin.
Cygwin is licensed under the LGPL with special exceptions for linking proprietary software. If I wanted to distribute this software via a platform like Steam, and distribute Cygwin with it, and link my proprietary game with it, could I?