MinGW: try -mpreferred-stack-boundary instead of mstackrealign

cmake/OpenCVCompilerOptions.cmake

@@ -32,15 +32,15 @@ if(MINGW)
   # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
   # here we are trying to workaround the problem
   include(CheckCXXCompilerFlag)
-  CHECK_CXX_COMPILER_FLAG(-mstackrealign HAVE_STACKREALIGN_FLAG)
-  if(HAVE_STACKREALIGN_FLAG)
-    set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -mstackrealign")
-  else()
+#  CHECK_CXX_COMPILER_FLAG(-mstackrealign HAVE_STACKREALIGN_FLAG)
+ # if(HAVE_STACKREALIGN_FLAG)
+  #  set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -mstackrealign")
+  #else()
     CHECK_CXX_COMPILER_FLAG(-mpreferred-stack-boundary=2 HAVE_PREFERRED_STACKBOUNDARY_FLAG)
     if(HAVE_PREFERRED_STACKBOUNDARY_FLAG)
       set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -mstackrealign")
     endif()
-  endif()
+  #endif()
 endif()
 
 if(CMAKE_COMPILER_IS_GNUCXX)