opencv: Update to 4.1.1

Update Makefile to modern standards.

Switched to local tarballs..xz archives are smaller. The .gz archive that
codeload comes with is 85MB.

Replaced PKG_INSTALL with CMAKE_INSTALL to get rid of Build/InstallDev.

Added PKG_BUILD_PARALLEL for faster compilation.

Removed inactive maintainer.

Added uClibc-ng patches to fix compilation.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/opencv/Makefile

@@ -9,16 +9,23 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=opencv
-PKG_VERSION:=3.1.0
-PKG_RELEASE:=3
+PKG_VERSION:=4.1.1
+PKG_RELEASE:=1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).zip
-PKG_SOURCE_URL:=http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/$(PKG_VERSION)/
-PKG_HASH:=1f6990249fdb82804fff40e96fa6d99949023ab0e3277eae4bd459b374e622a4
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/opencv/opencv
+PKG_SOURCE_VERSION:=$(PKG_VERSION)
+PKG_MIRROR_HASH:=c8587820421d2f22acdafe4712d068ae490897dc445bdb4aa128ecaa8e65d3a1
 
+PKG_MAINTAINER:=
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
 
+CMAKE_INSTALL:=1
+CMAKE_BINARY_SUBDIR:=build
+PKG_BUILD_PARALLEL:=1
+PKG_USE_MIPS16:=0
+
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
 
@@ -35,14 +42,12 @@ define Package/opencv
   SECTION:=libs
   CATEGORY:=Libraries
   TITLE:=OpenCV
-  URL:=http://opencv.org/
-  MAINTAINER:=WRTnode Team <pub@wrtnode.com>
-  DEPENDS:=+libpthread +librt +libstdcpp +zlib +libjpeg
+  URL:=https://opencv.org/
+  DEPENDS:=+libpthread +librt +libatomic +libstdcpp +zlib +libjpeg
 endef
 
-PKG_INSTALL:=1
-
-CMAKE_OPTIONS += -DBUILD_opencv_gpu:BOOL=OFF \
+CMAKE_OPTIONS += \
+	-DBUILD_opencv_gpu:BOOL=OFF \
 	-DWITH_1394:BOOL=OFF -DBUILD_opencv_stitching:BOOL=OFF \
 	-DBUILD_opencv_superres:BOOL=OFF -DBUILD_opencv_ts:BOOL=OFF \
 	-DBUILD_opencv_highgui:BOOL=OFF \
@@ -56,15 +61,7 @@ CMAKE_OPTIONS += -DBUILD_opencv_gpu:BOOL=OFF \
 	-DCMAKE_VERBOSE:BOOL=OFF \
 	-DENABLE_PRECOMPILED_HEADERS=OFF
 
-define Build/InstallDev
-	$(INSTALL_DIR) $(1)/usr/include
-	$(CP) $(PKG_INSTALL_DIR)/usr/include/opencv $(1)/usr/include/
-	$(CP) $(PKG_INSTALL_DIR)/usr/include/opencv2 $(1)/usr/include/
-	$(INSTALL_DIR) $(1)/usr/lib
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libopencv* $(1)/usr/lib/
-	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/opencv.pc $(1)/usr/lib/pkgconfig/
-endef
+TARGET_LDFLAGS += -latomic
 
 define Package/opencv/install
 	$(INSTALL_DIR) $(1)/usr/lib

libs/opencv/patches/010-fix-url.patch

@@ -1,11 +0,0 @@
---- a/3rdparty/ippicv/downloader.cmake
-+++ b/3rdparty/ippicv/downloader.cmake
-@@ -64,7 +64,7 @@ function(_icv_downloader)
-       if(DEFINED ENV{OPENCV_ICV_URL})
-         set(OPENCV_ICV_URL $ENV{OPENCV_ICV_URL})
-       else()
--        set(OPENCV_ICV_URL "https://raw.githubusercontent.com/Itseez/opencv_3rdparty/${IPPICV_BINARIES_COMMIT}/ippicv")
-+        set(OPENCV_ICV_URL "https://raw.githubusercontent.com/opencv/opencv_3rdparty/${IPPICV_BINARIES_COMMIT}/ippicv")
-       endif()
-     endif()
- 

libs/opencv/patches/010-uclibc-ng.patch

@@ -0,0 +1,46 @@
+--- a/modules/gapi/include/opencv2/gapi/core.hpp
++++ b/modules/gapi/include/opencv2/gapi/core.hpp
+@@ -392,8 +392,8 @@ namespace core {
+             {
+                 GAPI_Assert(fx != 0. && fy != 0.);
+                 return in.withSize
+-                    (Size(static_cast<int>(std::round(in.size.width  * fx)),
+-                          static_cast<int>(std::round(in.size.height * fy))));
++                    (Size(static_cast<int>(round(in.size.width  * fx)),
++                          static_cast<int>(round(in.size.height * fy))));
+             }
+         }
+     };
+--- a/modules/gapi/include/opencv2/gapi/own/saturate.hpp
++++ b/modules/gapi/include/opencv2/gapi/own/saturate.hpp
+@@ -81,8 +81,8 @@ static inline DST saturate(SRC x, R round)
+ // explicit suffix 'd' for double type
+ inline double  ceild(double x) { return std::ceil(x); }
+ inline double floord(double x) { return std::floor(x); }
+-inline double roundd(double x) { return std::round(x); }
+-inline double  rintd(double x) { return std::rint(x); }
++inline double roundd(double x) { return round(x); }
++inline double  rintd(double x) { return rint(x); }
+ 
+ } //namespace own
+ } //namespace gapi
+--- a/modules/gapi/src/backends/fluid/gfluidcore.cpp
++++ b/modules/gapi/src/backends/fluid/gfluidcore.cpp
+@@ -389,7 +389,7 @@ static void run_arithm_s1(uchar out[], const float in[], int width, const float
+     cv::util::suppress_unused_warning(v_op);
+     for (; w < width; w++)
+     {
+-        out[w] = saturate<uchar>(s_op(in[w], scalar[0]), std::roundf);
++        out[w] = saturate<uchar>(s_op(in[w], scalar[0]), roundf);
+     }
+ }
+ 
+@@ -1954,7 +1954,7 @@ GAPI_FLUID_KERNEL(GFluidCartToPolar, cv::gapi::core::GCartToPolar, false)
+         {
+             float x = in1[l];
+             float y = in2[l];
+-            float magnitude = std::hypot(y, x);
++            float magnitude = hypot(y, x);
+             float angle_rad = std::atan2(y, x);
+             float angle = angleInDegrees?
+                           angle_rad * static_cast<float>(180 / CV_PI):

libs/opencv/patches/020-l_tmpnam.patch

@@ -0,0 +1,13 @@
+--- a/3rdparty/libjasper/jas_stream.c
++++ b/3rdparty/libjasper/jas_stream.c
+@@ -86,6 +86,10 @@
+ #include <io.h>
+ #endif
+ 
++#ifndef L_tmpnam
++#define L_tmpnam 20
++#endif
++
+ #include "jasper/jas_types.h"
+ #include "jasper/jas_stream.h"
+ #include "jasper/jas_malloc.h"