diff -Naur freecad-0.14.3702.orig/src/Gui/CMakeLists.txt freecad-0.14.3702/src/Gui/CMakeLists.txt
--- freecad-0.14.3702.orig/src/Gui/CMakeLists.txt 2014-07-13 10:33:02.000000000 -0500
+++ freecad-0.14.3702/src/Gui/CMakeLists.txt 2014-07-22 21:25:04.508664979 -0500
@@ -57,6 +57,7 @@
set(FreeCADGui_LIBS
${FreeCADGui_LIBS}
${SPNAV_LIBRARIES}
+ X11
)
ENDIF(SPNAV_FOUND)