CMake: Check for libDl, conditionally check for libXCB

commonLibs/xcbXorg/CMakeLists.txt

@@ -1,14 +1,20 @@
-add_library(xcbXorg SHARED
-    xcbXorg.cpp
-)
+option(ENABLE_LIB_xcbXorg "Enable XCB/Xorg Connection Manager backend lib" ON)
 
-target_include_directories(xcbXorg PUBLIC
-    ${XCB_INCLUDE_DIRS}
-)
+if(ENABLE_LIB_xcbXorg)
+    pkg_check_modules(XCB REQUIRED xcb)
+    if(NOT XCB_FOUND)
+        message(FATAL_ERROR "XCB library not found. XCB/Xorg requires the XCB dev headers and shlib.")
+    endif()
 
-target_link_libraries(xcbXorg
-    ${XCB_LIBRARIES}
-)
+    add_library(xcbXorg SHARED
+        xcbXorg.cpp
+    )
 
-# Install rules
-install(TARGETS xcbXorg DESTINATION lib) 
+    # Set config define for header generation
+    add_compile_definitions(CONFIG_LIB_XCBXORG_ENABLED)
+    target_include_directories(xcbXorg PUBLIC ${XCB_INCLUDE_DIRS})
+    target_link_libraries(xcbXorg ${XCB_LIBRARIES})
+
+    # Install rules
+    install(TARGETS xcbXorg DESTINATION lib)
+endif()