[MacPorts] #53427: opencv build error on 10.9.5

[MacPorts]

#53427: opencv build error on 10.9.5
----------------------+--------------------
 Reporter:  RJVB      |      Owner:
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  opencv
----------------------+--------------------
 The recent (openmaintainer) upgrade to 3.2.0 seems to be missing a patch
 to allow building on 10.9.5 with the "stock" AppleClang compiler.

 Without the attached patch I get the following error:

 {{{
 :info:build cd /path/to/opencv/work/build/modules/highgui &&
 /usr/bin/clang++   -DCVAPI_EXPORTS -DHIGHGUI_EXPORTS -DQT_CONCURRENT_LIB
 -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -DQT_OPENGL_LIB
 -DQT_TESTCASE_BUILDDIR=\"/path/to/opencv/work/build\" -DQT_TESTLIB_LIB
 -DQT_WIDGETS_LIB -D__OPENCV_BUILD=1
 -I/path/to/opencv/work/build/modules/highgui
 -I/path/to/opencv/work/opencv-3.2.0/modules/highgui
 -I/path/to/opencv/work/build/Accelerate -I/path/to/opencv/work/build
 -isystem /opt/local/include/eigen3 -isystem /opt/local/include -iframework
 /opt/local/libexec/qt5/Library/Frameworks -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtCore.framework/Headers
 -isystem /opt/local/share/qt5/mkspecs/macx-clang -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtGui.framework/Headers -isystem
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/OpenGL.framework/Headers
 -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtWidgets.framework/Headers
 -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtTest.framework/Headers
 -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtConcurrent.framework/Headers
 -isystem
 /opt/local/libexec/qt5/Library/Frameworks/QtOpenGL.framework/Headers
 -I/path/to/opencv/work/opencv-3.2.0/modules/highgui/include
 -I/path/to/opencv/work/opencv-3.2.0/modules/highgui/src
 -I/path/to/opencv/work/opencv-3.2.0/modules/core/include
 -I/path/to/opencv/work/opencv-3.2.0/modules/imgproc/include
 -I/path/to/opencv/work/opencv-3.2.0/modules/imgcodecs/include
 -I/path/to/opencv/work/opencv-3.2.0/modules/videoio/include  -O3
 -march=native -g -DNDEBUG -I/opt/local/include -stdlib=libc++   -fsigned-
 char -arch x86_64 -mmacosx-version-min=10.9 -fPIC   -fPIC -std=gnu++11 -o
 CMakeFiles/opencv_highgui.dir/src/window_QT.cpp.o -c
 /path/to/opencv/work/opencv-3.2.0/modules/highgui/src/window_QT.cpp
 :info:build
 /path/to/opencv/work/opencv-3.2.0/modules/highgui/src/window_QT.cpp:106:66:
 error: non-constant-expression cannot be narrowed from type 'int' to
 'float' in initializer list [-Wc++11-narrowing]
 :info:build     CvFont f =
 {nameFont,color,style,NULL,NULL,NULL,0,0,0,weight,spacing,pointSize};
 :info:build
 ^~~~~~~
 :info:build
 /path/to/opencv/work/opencv-3.2.0/modules/highgui/src/window_QT.cpp:106:66:
 note: override this message by inserting an explicit cast
 :info:build     CvFont f =
 {nameFont,color,style,NULL,NULL,NULL,0,0,0,weight,spacing,pointSize};
 :info:build
 ^~~~~~~
 :info:build
 static_cast<float>( )
 :info:build 1 error generated.
 :info:build make[2]: ***
 [modules/highgui/CMakeFiles/opencv_highgui.dir/src/window_QT.cpp.o] Error
 1
 }}}

 Clang is kind enough to indicate the fix, which is trivial and safe.

--
Ticket URL: <https://trac.macports.org/ticket/53427>
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