Merge branch 4.x

samples/android/tutorial-4-opencl/build.gradle.in

@@ -15,11 +15,13 @@ android {
                 if (gradle.opencv_source == "sdk_path") {
                     arguments "-DOpenCV_DIR=" + project(':opencv').projectDir + "/@ANDROID_PROJECT_JNI_PATH@",
                               "-DOPENCV_FROM_SDK=TRUE",
+                              "-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON",
                               "-DANDROID_OPENCL_SDK=@ANDROID_OPENCL_SDK@" @OPENCV_ANDROID_CMAKE_EXTRA_ARGS@
 
                 } else {
                     arguments "-DOPENCV_VERSION_MAJOR=@OPENCV_VERSION_MAJOR@",
                               "-DOPENCV_FROM_SDK=FALSE",
+                              "-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON",
                               "-DANDROID_OPENCL_SDK=@ANDROID_OPENCL_SDK@" @OPENCV_ANDROID_CMAKE_EXTRA_ARGS@
                 }
                 targets "JNIpart"

samples/android/tutorial-4-opencl/jni/CMakeLists.txt

@@ -18,6 +18,14 @@ find_package(OpenCL QUIET)
 file(GLOB srcs *.cpp *.c)
 file(GLOB hdrs *.hpp *.h)
 
+# For 16k pages support with NDK prior 27
+# Details: https://developer.android.com/guide/practices/page-sizes?hl=en
+if(ANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES)
+  if(ANDROID_ABI STREQUAL arm64-v8a OR ANDROID_ABI STREQUAL x86_64)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,max-page-size=16384")
+  endif()
+endif()
+
 include_directories("${CMAKE_CURRENT_LIST_DIR}")
 add_library(${target} SHARED ${srcs} ${hdrs})