diff '--color=auto' -ur QGIS-final-4_0_0.orig/CMakeLists.txt QGIS-final-4_0_0/CMakeLists.txt
--- QGIS-final-4_0_0.orig/CMakeLists.txt	2026-03-06 18:54:12.950443100 +0100
+++ QGIS-final-4_0_0/CMakeLists.txt	2026-03-06 18:55:06.060226622 +0100
@@ -103,6 +103,7 @@
             message(STATUS "Couldn't find OpenCL C++ headers, using internal: ${OPENCL_HPP_INCLUDE_DIR}")
         endif()
         set(OpenCL_INCLUDE_DIRS ${OpenCL_INCLUDE_DIRS} ${OPENCL_HPP_INCLUDE_DIR})
+        include_directories(SYSTEM ${OpenCL_INCLUDE_DIRS})
     else()
         message(STATUS "Couldn't find OpenCL: support DISABLED")
     endif()