Removed CMake version checks that we don't need anymore.

cmake/OpenCVConfig.cmake

@@ -38,11 +38,9 @@
 #      - OpenCV_STATIC
 #      - OpenCV_CUDA
 
-if(CMAKE_VERSION VERSION_GREATER 2.6)
-  get_property(OpenCV_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
-  if(NOT ";${OpenCV_LANGUAGES};" MATCHES ";CXX;")
-    enable_language(CXX)
-  endif()
+get_property(OpenCV_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
+if(NOT ";${OpenCV_LANGUAGES};" MATCHES ";CXX;")
+  enable_language(CXX)
 endif()
 
 if(NOT DEFINED OpenCV_STATIC)
@@ -92,9 +90,7 @@ elseif(MINGW)
   endif()
 endif()
 
-if(CMAKE_VERSION VERSION_GREATER 2.6.2)
-  unset(OpenCV_CONFIG_PATH CACHE)
-endif()
+unset(OpenCV_CONFIG_PATH CACHE)
 
 get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_FILE}" PATH CACHE)
 if(OpenCV_RUNTIME AND OpenCV_ARCH)
@@ -156,4 +152,3 @@ else()
   set(OpenCV_FOUND FALSE CACHE BOOL "" FORCE)
   set(OPENCV_FOUND FALSE CACHE BOOL "" FORCE)
 endif()
-

cmake/OpenCVDetectAndroidSDK.cmake

@@ -124,7 +124,7 @@ if(ANDROID_EXECUTABLE)
   if(NOT ANDROID_SDK_TARGET)
     set(ANDROID_SDK_TARGET "" CACHE STRING "Android SDK target for the OpenCV Java API and samples")
   endif()
-  if(ANDROID_SDK_TARGETS AND CMAKE_VERSION VERSION_GREATER "2.8")
+  if(ANDROID_SDK_TARGETS)
     set_property( CACHE ANDROID_SDK_TARGET PROPERTY STRINGS ${ANDROID_SDK_TARGETS} )
   endif()
 endif(ANDROID_EXECUTABLE)

cmake/OpenCVDetectCUDA.cmake

@@ -1,8 +1,3 @@
-if(${CMAKE_VERSION} VERSION_LESS "2.8.3")
-  message(STATUS "WITH_CUDA flag requires CMake 2.8.3 or newer. CUDA support is disabled.")
-  return()
-endif()
-
 if(WIN32 AND NOT MSVC)
   message(STATUS "CUDA compilation is disabled (due to only Visual Studio compiler supported on your platform).")
   return()

cmake/OpenCVFindLibsGUI.cmake

@@ -15,7 +15,7 @@ endif(WITH_WIN32UI)
 # --- QT4 ---
 ocv_clear_vars(HAVE_QT HAVE_QT5)
 if(WITH_QT)
-  if(NOT CMAKE_VERSION VERSION_LESS 2.8.3 AND NOT WITH_QT EQUAL 4)
+  if(NOT WITH_QT EQUAL 4)
     find_package(Qt5Core)
     find_package(Qt5Gui)
     find_package(Qt5Widgets)