opencv: rename package with python bindings. (#13034)

* opencv: rename package with python bindings.

Includes other minor cleanups.

This is "the other half" of #12949.

* opencv, build fix for cmake >= 4.0

* Update media-libs/opencv/opencv-4.8.0.recipe

Co-authored-by: OscarL <oscar.lesta@gmail.com>

---------

Co-authored-by: Luc Schrijvers <begasus@gmail.com>

media-libs/opencv/opencv-4.8.0.recipe

@@ -10,15 +10,16 @@ COPYRIGHT="2000-2020, Intel Corporation
 	2015-2016, Itseez Inc.
 	2019-2020, Xperience AI"
 LICENSE="BSD (3-clause)"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://github.com/opencv/opencv/archive/$portVersion.tar.gz"
 SOURCE_FILENAME="opencv-$portVersion.tar.gz"
 CHECKSUM_SHA256="cbf47ecc336d2bff36b0dcd7d6c179a9bb59e805136af6b9670ca944aef889bd"
 SOURCE_URI_2="https://github.com/opencv/opencv_contrib/archive/refs/tags/$portVersion.tar.gz"
 SOURCE_FILENAME_2="opencv_contrib-$portVersion.tar.gz"
 CHECKSUM_SHA256_2="b4aef0f25a22edcd7305df830fa926ca304ea9db65de6ccd02f6cfa5f3357dbb"
+PATCHES="opencv-$portVersion.patchset"
 
-ARCHITECTURES="all !x86_gcc2 ?x86"
+ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 
 # On x86_gcc2 we don't want to install the commands in bin/<arch>/, but in bin/.
@@ -192,13 +193,29 @@ REQUIRES_devel="
 	opencv$secondaryArchSuffix == $portVersion base
 	"
 
-PROVIDES_python="
-	opencv${secondaryArchSuffix}_python = $portVersionCompat
-	"
-REQUIRES_python="
+pythonVersion=3.10
+pythonPackage=python${pythonVersion//.}
+
+# Allows using dot in sub-package names (eg: "_python3.10" vs "_python310"):
+eval "PACKAGE_NAME_$pythonPackage=\"${portName}_python$pythonVersion\""
+
+eval "PROVIDES_$pythonPackage=\"
+	${portName}_python$pythonVersion = $portVersionCompat
+	\""
+
+if [ -n "$secondaryArchSuffix" ]; then
+	eval "PROVIDES_${pythonPackage}+=\"
+		${portBaseName}_python$pythonVersion= $portVersionCompat
+		\""
+fi
+
+eval "REQUIRES_$pythonPackage=\"
 	haiku$secondaryArchSuffix
 	opencv$secondaryArchSuffix == $portVersion base
-	"
+	cmd:python$pythonVersion
+	\""
+
+eval "REPLACES_$pythonPackage=\"${portName}_python\""
 
 PROVIDES_tools="
 	opencv${secondaryArchSuffix}_tools = $portVersionCompat
@@ -213,8 +230,8 @@ PROVIDES_tools="
 REQUIRES_tools="
 	haiku$secondaryArchSuffix
 	opencv$secondaryArchSuffix == $portVersion base
-	numpy${secondaryArchSuffix}_python310
-	cmd:python3
+	numpy_$pythonPackage
+	cmd:python$pythonVersion
 	"
 
 BUILD_REQUIRES="
@@ -268,7 +285,7 @@ BUILD_PREREQUIRES="
 #	cmd:ant
 	cmd:cmake
 	cmd:doxygen
-	numpy${secondaryArchSuffix}_python310
+	numpy_$pythonPackage
 	cmd:gcc$secondaryArchSuffix
 #	cmd:javac
 #	cmd:jni
@@ -276,7 +293,7 @@ BUILD_PREREQUIRES="
 	cmd:make
 #	cmd:matlab # maybe later
 	cmd:pkg_config$secondaryArchSuffix
-	cmd:python3
+	cmd:python$pythonVersion
 	"
 
 defineDebugInfoPackage opencv$secondaryArchSuffix \
@@ -345,10 +362,8 @@ BUILD()
 		ARCH_SUBDIR="$secondaryArchSuffix/"
 	fi
 
-	pythonVersion=$(python3 --version 2>&1 | sed 's/Python //' | head -c4)
-
 	cmake .. \
-		-DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 		$cmakeDirArgs \
 		-DBUILD_TESTS=OFF \
 		-DBUILD_PERF_TESTS=OFF \
@@ -361,7 +376,6 @@ BUILD()
 		-DWITH_EIGEN=ON \
 		-DWITH_OPENEXR=ON \
 		-DWITH_FFMPEG=ON \
-		-DCMAKE_BUILD_TYPE=Release \
 		-DCMAKE_SKIP_RPATH=ON \
 		-DENABLE_PIC=OFF \
 		-DOPENCV_GENERATE_PKGCONFIG=YES \
@@ -370,9 +384,10 @@ BUILD()
 		-DOpenBLAS_INCLUDE_DIR="$portPackageLinksDir/openblas${secondaryArchSuffix}_devel/develop/headers/$ARCH_SUBDIR" \
 		-DOpenBLAS_LIB="$portPackageLinksDir/openblas${secondaryArchSuffix}_devel/develop/lib/$ARCH_SUBDIR" \
 		-DOPENCV_PYTHON3_INSTALL_PATH="$prefix/lib/python$pythonVersion/vendor-packages" \
-		-DPYTHON3_NUMPY_INCLUDE_DIRS:PATH="`finddir B_SYSTEM_LIB_DIRECTORY`/python${pythonVersion}/vendor-packages/numpy/core/include" \
+		-DPYTHON3_NUMPY_INCLUDE_DIRS:PATH="`finddir B_SYSTEM_LIB_DIRECTORY`/python$pythonVersion/vendor-packages/numpy/_core/include" \
 		-DOPENCV_EXTRA_MODULES_PATH="$sourceDir2/opencv_contrib-$portVersion/modules" \
-		-DEigen3_DIR=`finddir B_SYSTEM_DATA_DIRECTORY`/eigen3/cmake
+		-DEigen3_DIR=`finddir B_SYSTEM_DATA_DIRECTORY`/eigen3/cmake \
+		-Wno-dev
 
 	make $jobArgs
 }
@@ -460,7 +475,7 @@ INSTALL()
 		$libDir/cmake
 
 	# python package
-	packageEntries python \
+	packageEntries $pythonPackage \
 		$prefix/lib/python*
 
 	# tools package

media-libs/opencv/patches/opencv-4.8.0.patchset

@@ -0,0 +1,22 @@
+From 4858c29c68060fce787dd7456eedf2303c0329a2 Mon Sep 17 00:00:00 2001
+From: Luc Schrijvers <begasus@gmail.com>
+Date: Mon, 6 Oct 2025 08:01:12 +0200
+Subject: Build fix for cmake >= 4.0
+
+
+diff --git a/cmake/OpenCVGenPkgconfig.cmake b/cmake/OpenCVGenPkgconfig.cmake
+index 8d36b74..2718b8b 100644
+--- a/cmake/OpenCVGenPkgconfig.cmake
++++ b/cmake/OpenCVGenPkgconfig.cmake
+@@ -110,7 +110,7 @@ endif()
+ # =============================================================================
+ else() # DEFINED CMAKE_HELPER_SCRIPT
+ 
+-cmake_minimum_required(VERSION 2.8.12.2)
++cmake_minimum_required(VERSION 3.5)
+ cmake_policy(SET CMP0012 NEW)
+ include("${CMAKE_HELPER_SCRIPT}")
+ include("${OpenCV_SOURCE_DIR}/cmake/OpenCVUtils.cmake")
+-- 
+2.50.1
+