cygwin에서 Irrlicht엔진 빌드 오류

In file included from CIrrDeviceLinux.cpp:5:0: CIrrDeviceLinux.h:31:38: fatal error: X11/extensions/xf86vmode.h: No such file or directory

이게 웬 에러지.. 하고 한참을 구글링했지만 쉽게 찾아지지 않았다.
하지만 답은 Irrlicht 사이트에 있었다 -_-;;

단순히 irrlicht-1.7.3\include\IrrCompileConfig.h에서

//! On some Linux systems the XF86 vidmode extension or X11 RandR are missing. Use these flags
//! to remove the dependencies such that Irrlicht will compile on those systems, too.
#if defined(_IRR_LINUX_PLATFORM_) && defined(_IRR_COMPILE_WITH_X11_)
#define _IRR_LINUX_X11_VIDMODE_
//#define _IRR_LINUX_X11_RANDR_
#endif

이것을

//! On some Linux systems the XF86 vidmode extension or X11 RandR are missing. Use these flags
//! to remove the dependencies such that Irrlicht will compile on those systems, too.
#if defined(_IRR_LINUX_PLATFORM_) && defined(_IRR_COMPILE_WITH_X11_)
//#define _IRR_LINUX_X11_VIDMODE_
#define _IRR_LINUX_X11_RANDR_
#endif