Hi,

on my system X11 comes with the X video mode extensions, consisting of a 
header xf86vmode.h and a library libXxf86vm.so.

Question is: are there (older, proprietary) systems, where this header exists, 
but there is no libXxf86vm.so ?

To check, you can run cmake on the attached CMakeLists.txt. If it says that it 
found the header, but not the library, please let me know.

Thanks
Alex
cmake_minimum_required(VERSION 2.8)

find_path(X11_xf86vmode_INCLUDE_PATH X11/extensions/xf86vmode.h )
find_library(X11_Xxf86vm_LIB Xxf86vm    )

message(STATUS "inc dir: ${X11_xf86vmode_INCLUDE_PATH} lib: ${X11_Xxf86vm_LIB}")

if (X11_xf86vmode_INCLUDE_PATH AND NOT X11_Xxf86vm_LIB)
  message(FATAL_ERROR "Include dir found but no library found !")
endif()

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