当尝试使用Cygwin构建GLEW时，我收到以下错误：
$ make
cc -DGLEW_NO_GLU -O2 -Wall -W -Iinclude -o tmp/cygwin/defau
src/glew.c
In file included from src/glew.c:37:0:
include/GL/glxew.h:97:22: fatal error: X11/Xlib.h: No such fi
compilation terminated.
Makefile:122: recipe for target `tmp/cygwin/default/shared/gl
make: *** [tmp/cygwin/default/shared/glew.o] Error 1
可能导致这种情况的原因是什么？