TCCygwin is a lightweight C compiler for Windows that combines Tiny C Compiler's small footprint with Cygwin's POSIX runtime support, enabling fast compilation and self-hosting builds with a ~2 MB distribution size.
TCC_CYGWIN is a native Windows compiler that generates code for the Cygwin POSIX layer, available in stable (3.6.10-1) and development (3.7.0-0.602) versions. The compiler requires cygwin1.dll to run and works best when placed in a standard FHS-compliant directory structure.