patch-CMakeLists.txt

--- CMakeLists.txt.orig	2023-10-16 06:14:43 UTC
+++ CMakeLists.txt
@@ -32,9 +32,10 @@ find_package(SDL2 REQUIRED)
 set(SDL2_BUILDING_LIBRARY ON)
 
 find_package(SDL2 REQUIRED)
+find_package(X11 REQUIRED)
 FIND_PACKAGE(SDL2_mixer REQUIRED)
 
-include_directories(${SDL2_INCLUDE_DIR} ${SDL2_MIXER_INCLUDE_DIR})
+include_directories(${SDL2_INCLUDE_DIR} ${SDL2_MIXER_INCLUDE_DIR} ${X11_INCLUDE_DIR})
 get_property(dirs DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY INCLUDE_DIRECTORIES)
 foreach(dir ${dirs})
   message(STATUS "Include dir='${dir}'")
@@ -215,7 +216,7 @@ endif()
             )
 endif()
 
-target_link_libraries(SpaceCadetPinball ${SDL2_LIBRARY} ${SDL2_MIXER_LIBRARY})
+target_link_libraries(SpaceCadetPinball ${SDL2_LIBRARY} ${SDL2_MIXER_LIBRARY} ${X11_LIBRARIES})
 
 # On Windows, copy DLL to output
 if(WIN32)