From a56c12278ee130ef59d86dcd284e37d406b70004 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Mon, 15 Apr 2019 20:00:55 +0300
Subject: [PATCH] cmake: fix C++11 flags (ENABLE_CXX11 is not required)

---
 cmake/OpenCVDetectCXXCompiler.cmake     | 2 +-
 cmake/OpenCVDetectInferenceEngine.cmake | 7 -------
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/cmake/OpenCVDetectCXXCompiler.cmake b/cmake/OpenCVDetectCXXCompiler.cmake
index 03afccd935..0c79f42f39 100644
--- a/cmake/OpenCVDetectCXXCompiler.cmake
+++ b/cmake/OpenCVDetectCXXCompiler.cmake
@@ -176,7 +176,7 @@ if(CMAKE_CXX11_COMPILE_FEATURES)
 endif()
 if(NOT HAVE_CXX11)
   ocv_check_compiler_flag(CXX "" HAVE_CXX11 "${OpenCV_SOURCE_DIR}/cmake/checks/cxx11.cpp")
-  if(NOT HAVE_CXX11 AND ENABLE_CXX11)
+  if(NOT HAVE_CXX11)
     ocv_check_compiler_flag(CXX "-std=c++11" HAVE_STD_CXX11 "${OpenCV_SOURCE_DIR}/cmake/checks/cxx11.cpp")
     if(HAVE_STD_CXX11)
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
diff --git a/cmake/OpenCVDetectInferenceEngine.cmake b/cmake/OpenCVDetectInferenceEngine.cmake
index 5a4ddc6470..a5c2b5d948 100644
--- a/cmake/OpenCVDetectInferenceEngine.cmake
+++ b/cmake/OpenCVDetectInferenceEngine.cmake
@@ -17,13 +17,6 @@
 # INF_ENGINE_TARGET - set to name of imported library target representing InferenceEngine
 #
 
-if(NOT HAVE_CXX11)
-    message(WARNING "DL Inference engine requires C++11. You can turn it on via ENABLE_CXX11=ON CMake flag.")
-    return()
-endif()
-
-# =======================
-
 function(add_custom_ie_build _inc _lib _lib_rel _lib_dbg _msg)
   if(NOT _inc OR NOT (_lib OR _lib_rel OR _lib_dbg))
     return()