Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtopengl/Manifest

@@ -0,0 +1,5 @@
+DIST qtbase-5.15-gentoo-patchset-6.tar.xz 8288 BLAKE2B ad9695a528345dd3b8e9ce72b7bdfe8f744f16685a567bbc7862ba6c28e5a426260cb0b73e2573cb3a6f16f1785786898ffb44c90f5d75354b97e5756c7573db SHA512 97bc4d5375e1750a5578439ff320ee2e5e929df1dafe56b4e86f2de8ad26c91dc4002e45ad75d9f936347d49b9f54c0c42f8fc2cb7dfd4f54bf08a210b3bc720
+DIST qtbase-5.15.16-gentoo-kde-1.tar.xz 319504 BLAKE2B 52675483f6be19a3efbddbe68335ee575852859137c51ca9e7cc219740a3529d270cb2af085eee8de1964c2171eab4f0c64b79c03f1bac453a4829748aff528d SHA512 0a38ce02b563f79364f3559fda4d4e13092ee79b820fb780db10e40af3bac158ee139e1a216f4de3c986eacbd933965e7ed8c261de7a65d487981887aed840dd
+DIST qtbase-5.15.17-gentoo-kde-1.tar.xz 314280 BLAKE2B a13b0589fab0f43be9b2ba6a669845572ee499363cbe2a8c0975eaf193101960f11efc96f3324d8662a458e41bea42e6d706b3f099f4cfbbea585cab8c3f3f55 SHA512 4b12db534e9fa5f24f597f4e760c8b70d5a41e732b588a9a53f95f4e849cb07a5c8a7f4c3fb690c8b98986a13b1c972b9aac15cfe43ef5b8ab26492b8987169a
+DIST qtbase-everywhere-opensource-src-5.15.16.tar.xz 51392072 BLAKE2B f7f83f18f91200350eff4d2d8d56769b537540290434a1c434d7c891b0b533d5a77000b5a670228a947d74c21f131f207b31aeb96f1f2ec867bbf608202c99b0 SHA512 190581c7df9763c2550466f884784d6f38817a087ab44fe57b99c1d1ac2ea3bae94ced8a6d0873a7999e523d63831d135cd7407812c8814ac4ef957840b7058e
+DIST qtbase-everywhere-opensource-src-5.15.17.tar.xz 51478524 BLAKE2B 1700126de93ecfc2efd128056a295b8fdd2293e2df41e4fefa3d6f61c250d1ae8502a483192ffa85bd1fbd8d086cfd26612c951fb822c19bd0ec3f1b49241968 SHA512 8be592e27279d1009b596535fee95cb6fa8a379e991db5b0f3fa24fcddde7433d2cdfe2cd3fc5fff3f8e112110c5d8fa60c9efd9254053ea08ded5c3f9b73571

dev-qt/qtopengl/metadata.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>qt@gentoo.org</email>
+		<name>Gentoo Qt Project</name>
+	</maintainer>
+	<upstream>
+		<bugs-to>https://bugreports.qt.io/</bugs-to>
+		<doc>https://doc.qt.io/</doc>
+	</upstream>
+	<slots>
+		<subslots>
+			Must only be used by packages that are known to use private parts of the Qt API.
+		</subslots>
+	</slots>
+</pkgmetadata>

dev-qt/qtopengl/qtopengl-5.15.16.ebuild

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+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv x86"
+fi
+
+QT5_MODULE="qtbase"
+VIRTUALX_REQUIRED="test"
+inherit qt5-build
+
+DESCRIPTION="OpenGL support library for the Qt5 framework (deprecated)"
+
+IUSE="gles2-only"
+
+DEPEND="
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	=dev-qt/qtgui-${QT5_PV}*[gles2-only=]
+	=dev-qt/qtwidgets-${QT5_PV}*[gles2-only=]
+"
+RDEPEND="${DEPEND}"
+
+QT5_TARGET_SUBDIRS=(
+	src/opengl
+)
+
+src_configure() {
+	local myconf=(
+		-opengl $(usex gles2-only es2 desktop)
+	)
+	qt5-build_src_configure
+}

dev-qt/qtopengl/qtopengl-5.15.17.ebuild

@@ -0,0 +1,35 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+QT5_MODULE="qtbase"
+VIRTUALX_REQUIRED="test"
+inherit qt5-build
+
+DESCRIPTION="OpenGL support library for the Qt5 framework (deprecated)"
+
+IUSE="gles2-only"
+
+DEPEND="
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	=dev-qt/qtgui-${QT5_PV}*[gles2-only=]
+	=dev-qt/qtwidgets-${QT5_PV}*[gles2-only=]
+"
+RDEPEND="${DEPEND}"
+
+QT5_TARGET_SUBDIRS=(
+	src/opengl
+)
+
+src_configure() {
+	local myconf=(
+		-opengl $(usex gles2-only es2 desktop)
+	)
+	qt5-build_src_configure
+}

dev-qt/qtopengl/qtopengl-5.15.18.ebuild

@@ -0,0 +1,35 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv x86"
+fi
+
+QT5_MODULE="qtbase"
+VIRTUALX_REQUIRED="test"
+inherit qt5-build
+
+DESCRIPTION="OpenGL support library for the Qt5 framework (deprecated)"
+
+IUSE="gles2-only"
+
+DEPEND="
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	=dev-qt/qtgui-${QT5_PV}*[gles2-only=]
+	=dev-qt/qtwidgets-${QT5_PV}*[gles2-only=]
+"
+RDEPEND="${DEPEND}"
+
+QT5_TARGET_SUBDIRS=(
+	src/opengl
+)
+
+src_configure() {
+	local myconf=(
+		-opengl $(usex gles2-only es2 desktop)
+	)
+	qt5-build_src_configure
+}