Clarify why check for XInput

[freeglut] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dee50b1..fc22ed6 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -228,6 +228,7 @@ IF(UNIX AND NOT ANDROID)
         LIST(APPEND LIBS ${X11_Xxf86vm_LIB})
     ENDIF()
     IF(X11_Xinput_FOUND)
+        # Needed for multi-touch:
         CHECK_INCLUDE_FILES("${X11_Xinput_INCLUDE_PATH}/X11/extensions/XInput2.h" HAVE_X11_EXTENSIONS_XINPUT2_H)
         LIST(APPEND LIBS ${X11_Xinput_LIB})
     ENDIF()
@@ -397,9 +398,11 @@ ADD_DEMO(Resizer         progs/demos/Resizer/Resizer.cpp)
 ADD_DEMO(multi-touch     progs/demos/multi-touch/multi-touch.c)
 ADD_DEMO(shapes          progs/demos/shapes/shapes.c)
 ADD_DEMO(smooth_opengl3  progs/demos/smooth_opengl3/smooth_opengl3.c)
-ADD_DEMO(spaceball       progs/demos/spaceball/spaceball.c
-                         progs/demos/spaceball/vmath.c
-                         progs/demos/spaceball/vmath.h)
+IF(UNIX)
+    ADD_DEMO(spaceball       progs/demos/spaceball/spaceball.c
+                             progs/demos/spaceball/vmath.c
+                             progs/demos/spaceball/vmath.h)
+ENDIF()
 ADD_DEMO(subwin          progs/demos/subwin/subwin.c)
 ADD_DEMO(timer           progs/demos/timer/timer.c)