Description: Ensure that missing optional libraries for the build of x0vncserver are now fatal build errors.
Author: Joachim Falk <joachim.falk@gmx.de>

Index: pkg-tigervnc/unix/x0vncserver/CMakeLists.txt
===================================================================
--- pkg-tigervnc/unix/x0vncserver/CMakeLists.txt.orig	2019-06-15 13:15:24.325682003 +0200
+++ pkg-tigervnc/unix/x0vncserver/CMakeLists.txt	2019-06-15 13:16:03.301580417 +0200
@@ -26,28 +26,28 @@
   add_definitions(-DHAVE_XTEST)
   target_link_libraries(x0vncserver ${X11_XTest_LIB})
 else()
-  message(WARNING "No XTest extension.  x0vncserver will be view-only.")
+  message(FATAL_ERROR "No XTest extension.  x0vncserver will be view-only.")
 endif()
 
 if(X11_FOUND AND X11_Xdamage_LIB)
   add_definitions(-DHAVE_XDAMAGE)
   target_link_libraries(x0vncserver ${X11_Xdamage_LIB})
 else()
-  message(WARNING "No DAMAGE extension.  x0vncserver will have to use the slower polling method.")
+  message(FATAL_ERROR "No DAMAGE extension.  x0vncserver will have to use the slower polling method.")
 endif()
 
 if(X11_FOUND AND X11_Xfixes_LIB)
   add_definitions(-DHAVE_XFIXES)
   target_link_libraries(x0vncserver ${X11_Xfixes_LIB})
 else()
-  message(WARNING "No XFIXES extension.  x0vncserver will not be able to show cursors.")
+  message(FATAL_ERROR "No XFIXES extension.  x0vncserver will not be able to show cursors.")
 endif()
 
 if(X11_FOUND AND X11_Xrandr_LIB)
   add_definitions(-DHAVE_XRANDR)
   target_link_libraries(x0vncserver ${X11_Xrandr_LIB})
 else()
-  message(WARNING "No Xrandr extension.  x0vncserver will not be able to resize session.")
+  message(FATAL_ERROR "No Xrandr extension.  x0vncserver will not be able to resize session.")
 endif()
 
 target_link_libraries(x0vncserver ${X11_LIBRARIES})