build: eliminate ICC warnings

cmake/OpenCVCompilerOptions.cmake

@@ -436,6 +436,12 @@ if(MSVC)
     ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4275) # non dll-interface class 'std::exception' used as base for dll-interface class 'cv::Exception'
     ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4589) # Constructor of abstract class 'cv::ORB' ignores initializer for virtual base class 'cv::Algorithm'
   endif()
+
+  if(CV_ICC AND NOT ENABLE_NOISY_WARNINGS)
+    foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
+      string(REGEX REPLACE "( |^)/W[0-9]+( |$)" "\\1\\2" ${flags} "${${flags}}")
+    endforeach()
+  endif()
 endif()
 
 if(APPLE AND NOT CMAKE_CROSSCOMPILING AND NOT DEFINED ENV{LDFLAGS} AND EXISTS "/usr/local/lib")

modules/core/test/test_arithm.cpp

 #include "test_precomp.hpp"
 #include <cmath>
-#ifndef NAN
-#include <limits> // numeric_limits<T>::quiet_NaN()
-#define NAN std::numeric_limits<float>::quiet_NaN()
-#endif
 
 using namespace cv;
 using namespace std;
@@ -1895,7 +1891,7 @@ TEST(MinMaxLoc, regression_4955_nans)
     cv::Mat one_mat(2, 2, CV_32F, cv::Scalar(1));
     cv::minMaxLoc(one_mat, NULL, NULL, NULL, NULL);
 
-    cv::Mat nan_mat(2, 2, CV_32F, cv::Scalar(NAN));
+    cv::Mat nan_mat(2, 2, CV_32F, cv::Scalar(std::numeric_limits<float>::quiet_NaN()));
     cv::minMaxLoc(nan_mat, NULL, NULL, NULL, NULL);
 }