Merged the trunk r8384:8407 (inclusive)

cmake/OpenCVCompilerOptions.cmake

@@ -1,3 +1,18 @@
+if(MINGW)
+  # mingw compiler is known to produce unstable SSE code with -O3 hence we are trying to use -O2 instead
+  if(CMAKE_COMPILER_IS_GNUCXX)
+    foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
+      string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
+    endforeach()
+  endif()
+
+  if(CMAKE_COMPILER_IS_GNUCC)
+    foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
+      string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
+    endforeach()
+  endif()
+endif()
+
 if(MSVC)
   if(CMAKE_CXX_FLAGS STREQUAL CMAKE_CXX_FLAGS_INIT)
     # override cmake default exception handling option
@@ -14,18 +29,18 @@ set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "")
 set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "")
 
 if(MINGW)
-  # mingw compiler is known to produce unstable SSE code
+  # 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)

cmake/OpenCVDetectAndroidSDK.cmake

@@ -8,7 +8,7 @@ file(TO_CMAKE_PATH "$ENV{HOME}" HOME_ENV_PATH)
 if(CMAKE_HOST_WIN32)
   set(ANDROID_SDK_OS windows)
 elseif(CMAKE_HOST_APPLE)
-  set(ANDROID_SDK_OS mac)
+  set(ANDROID_SDK_OS macosx)
 else()
   set(ANDROID_SDK_OS linux)
 endif()

cmake/OpenCVDetectPython.cmake

@@ -1,4 +1,4 @@
-if(MSVC AND NOT PYTHON_EXECUTABLE)
+if(WIN32 AND NOT PYTHON_EXECUTABLE)
   # search for executable with the same bitness as resulting binaries
   # standard FindPythonInterp always prefers executable from system path
   # this is really important because we are using the interpreter for numpy search and for choosing the install location

cmake/OpenCVUtils.cmake

@@ -11,7 +11,7 @@ if(NOT COMMAND find_host_program)
   endmacro()
 endif()
 
-#added include directories in such way that directories from the OpenCV source tree go first
+# adds include directories in such way that directories from the OpenCV source tree go first
 function(ocv_include_directories)
   set(__add_before "")
   foreach(dir ${ARGN})
@@ -25,6 +25,12 @@ function(ocv_include_directories)
   include_directories(BEFORE ${__add_before})
 endfunction()
 
+# clears all passed variables
+macro(ocv_clear_vars)
+  foreach(_var ${ARGN})
+    unset(${_var} CACHE)
+  endforeach()
+endmacro()
 
 # Provides an option that the user can optionally select.
 # Can accept condition to control when option is available for user.
@@ -352,10 +358,11 @@ macro(ocv_parse_header2 LIBNAME HDR_PATH VARNAME SCOPE)
       set(${LIBNAME}_VERSION_STRING "${${LIBNAME}_VERSION_STRING}.${${LIBNAME}_VERSION_TWEAK}" ${SCOPE})
     endif()
   else()
-    unset(${LIBNAME}_VERSION_MAJOR CACHE)
-    unset(${LIBNAME}_VERSION_MINOR CACHE)
-    unset(${LIBNAME}_VERSION_PATCH CACHE)
-    unset(${LIBNAME}_VERSION_TWEAK CACHE)
-    unset(${LIBNAME}_VERSION_STRING CACHE)
+    ocv_clear_vars(${LIBNAME}_VERSION_MAJOR
+                   ${LIBNAME}_VERSION_MAJOR
+                   ${LIBNAME}_VERSION_MINOR
+                   ${LIBNAME}_VERSION_PATCH
+                   ${LIBNAME}_VERSION_TWEAK
+                   ${LIBNAME}_VERSION_STRING)
   endif()
 endmacro()