Added cmake option for abi descriptor generating (GENERATE_ABI_DESCRIPTOR)

cmake/OpenCVGenABI.cmake

@@ -0,0 +1,29 @@
+if (NOT GENERATE_ABI_DESCRIPTOR)
+  return()
+endif()
+
+set(filename "opencv_abi.xml")
+set(path1 "${CMAKE_BINARY_DIR}/${filename}")
+
+set(modules "${OPENCV_MODULES_PUBLIC}")
+ocv_list_filterout(modules "opencv_ts")
+
+message(STATUS "Generating ABI compliance checker configuration: ${filename}")
+
+if (OPENCV_VCSVERSION AND NOT OPENCV_VCSVERSION STREQUAL "unknown")
+  set(OPENCV_ABI_VERSION "${OPENCV_VCSVERSION}")
+else()
+  set(OPENCV_ABI_VERSION "${OPENCV_VERSION}")
+endif()
+
+# Headers
+set(OPENCV_ABI_HEADERS "{RELPATH}/${OPENCV_INCLUDE_INSTALL_PATH}")
+
+# Libraries
+set(OPENCV_ABI_LIBRARIES "{RELPATH}/${OPENCV_LIB_INSTALL_PATH}")
+
+# Options
+set(OPENCV_ABI_GCC_OPTIONS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE}")
+string(REGEX REPLACE "([^ ]) +([^ ])" "\\1\\n    \\2" OPENCV_ABI_GCC_OPTIONS "${OPENCV_ABI_GCC_OPTIONS}")
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/opencv_abi.xml.in" "${path1}")