Revert "dev-java/openjdk: drop old 11"

This reverts commit 1a56dd109509399af44cec59a2158136f95d359b.

Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>

3 files changed, 546 insertions, 0 deletions

diff --git a/dev-java/openjdk/Manifest b/dev-java/openjdk/Manifest
index eabaadac69e9..0cf213bf2f1e 100644
--- a/dev-java/openjdk/Manifest
+++ b/dev-java/openjdk/Manifest
@@ -1,4 +1,6 @@
+DIST openjdk-11.0.10_p9.tar.bz2 95141294 BLAKE2B f35cd0392b433210eb06b023bd92a168e17363635e27addcdcf1f1f9de7091a9f447a15b0fbbd1b0e3425377cb770de8dedf31c3a1cb1d7ecfc944175be4464d SHA512 755d6b9789ddca274fefa1762a68892ec0597e581d16fa2a26cfce0e5c10232c73706f3beb99fcaf99e80a051d0db7365e3c5402e952c2dec4405626ac2a4ef7
 DIST openjdk-11.0.11_p9.tar.bz2 95298760 BLAKE2B 7572d297fecffa9d38998c79dda00ea9361c1cf2f6c8bf51bac782da17cd3b6b272d08ab57fff96d523a1299f5514cb3788d05eeb37ef467ee7ad8bbb156d98e SHA512 72deecf32b793fa331deb6a1c0294b1efc68b72af9aebc1ba0528189e0097ff6d226cd0c3947d3cdc35c3cf28b3450cc538d375be0b9d43dca379f244894d20e
+DIST openjdk-11.0.9_p11.tar.bz2 91638327 BLAKE2B a04b7fb5ebde3b6c024e5f3931a2efe796e08ad66c0190cddfa4268d5181f46f24685d9d51ae328547916e8ece723967bf653feeac87347ee14ecbe213ad657a SHA512 a0a6726d5adbe95904b78d8b4319bc4386c594a563f80f63d59072cf72d00928b451163b91258b44193a80851400ce8b8d142fecfd2bd902ff7a5e47cb4a9976
 DIST openjdk-8.272_p10.tar.bz2 457222 BLAKE2B 51e487d36c1922c5fc04d8922f1000a776e4872142517933ef5e8d5fd825f221fa02325bd755bf3f48f7f3221a2da3ca182301fb303675cb7d712d7b2f1c7751 SHA512 488b7fa0ed725936d483efd54242dbf4409752c685f29277023fb47c4375b5700b34e743d819d7d7c2406a2f8845d1c3d4fc548c156b6c7c30e43574c1b51527
 DIST openjdk-8.282_p08.tar.bz2 457358 BLAKE2B 4451b2de340136ceb152615a32e33a3db60ff0f000d00e758d992f549af0110c4f64e3724abdd6ca7d679862e927557d475a2a36e923f0c3c5dd48fcb81b9b45 SHA512 40ccce0a25da6a6eef5cadfc0d6b208d0243ccd1fbc2a7aaef4c627802144122dbda96677c2d3ba45e05c5ac123a058ed37f59b8f035f0afcf34e832d50e8c35
 DIST openjdk-8.292_p10.tar.bz2 457861 BLAKE2B 043c1d6f7d040dedaadd05091ce4fdf3f516c1cd241e3603c81f2c49fd81df9c4f1082822a5471255381d56f3ab838a24e499b4ec647f3354ee051078c496b2c SHA512 6e1ac380db32fa5f1decc80291dcdb5e1d3d9afb0dc4587966c5a1b840588a984bc07109c23cb0c69c60509c6db8152e7306509280063f7d2e853aed41e391cc
diff --git a/dev-java/openjdk/openjdk-11.0.10_p9.ebuild b/dev-java/openjdk/openjdk-11.0.10_p9.ebuild
new file mode 100644
index 000000000000..ca908bb4c188
--- /dev/null
+++ b/dev-java/openjdk/openjdk-11.0.10_p9.ebuild
@@ -0,0 +1,272 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit autotools check-reqs flag-o-matic java-pkg-2 java-vm-2 multiprocessing pax-utils toolchain-funcs
+
+# we need -ga tag to fetch tarball and unpack it, but exact number everywhere else to
+# set build version properly
+MY_PV="${PV%_p*}-ga"
+SLOT="${MY_PV%%[.+]*}"
+
+DESCRIPTION="Open source implementation of the Java programming language"
+HOMEPAGE="https://openjdk.java.net"
+SRC_URI="https://hg.${PN}.java.net/jdk-updates/jdk${SLOT}u/archive/jdk-${MY_PV}.tar.bz2 -> ${P}.tar.bz2"
+
+LICENSE="GPL-2"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64"
+
+IUSE="alsa cups debug doc examples gentoo-vm headless-awt javafx +jbootstrap +pch selinux source systemtap"
+
+COMMON_DEPEND="
+	media-libs/freetype:2=
+	media-libs/giflib:0/7
+	media-libs/libpng:0=
+	media-libs/lcms:2=
+	sys-libs/zlib
+	virtual/jpeg:0=
+	systemtap? ( dev-util/systemtap )
+"
+
+# Many libs are required to build, but not to run, make is possible to remove
+# by listing conditionally in RDEPEND unconditionally in DEPEND
+RDEPEND="
+	${COMMON_DEPEND}
+	>=sys-apps/baselayout-java-0.1.0-r1
+	!headless-awt? (
+		x11-libs/libX11
+		x11-libs/libXext
+		x11-libs/libXi
+		x11-libs/libXrandr
+		x11-libs/libXrender
+		x11-libs/libXt
+		x11-libs/libXtst
+	)
+	alsa? ( media-libs/alsa-lib )
+	cups? ( net-print/cups )
+	selinux? ( sec-policy/selinux-java )
+"
+
+DEPEND="
+	${COMMON_DEPEND}
+	app-arch/zip
+	media-libs/alsa-lib
+	net-print/cups
+	x11-base/xorg-proto
+	x11-libs/libX11
+	x11-libs/libXext
+	x11-libs/libXi
+	x11-libs/libXrandr
+	x11-libs/libXrender
+	x11-libs/libXt
+	x11-libs/libXtst
+	javafx? ( dev-java/openjfx:${SLOT}= )
+	|| (
+		dev-java/openjdk-bin:${SLOT}
+		dev-java/openjdk:${SLOT}
+	)
+"
+
+REQUIRED_USE="javafx? ( alsa !headless-awt )"
+
+S="${WORKDIR}/jdk${SLOT}u-jdk-${MY_PV}"
+
+# The space required to build varies wildly depending on USE flags,
+# ranging from 2GB to 16GB. This function is certainly not exact but
+# should be close enough to be useful.
+openjdk_check_requirements() {
+	local M
+	M=2048
+	M=$(( $(usex jbootstrap 2 1) * $M ))
+	M=$(( $(usex debug 3 1) * $M ))
+	M=$(( $(usex doc 320 0) + $(usex source 128 0) + 192 + $M ))
+
+	CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+pkg_pretend() {
+	openjdk_check_requirements
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		has ccache ${FEATURES} && die "FEATURES=ccache doesn't work with ${PN}, bug #677876"
+	fi
+}
+
+pkg_setup() {
+	openjdk_check_requirements
+	java-vm-2_pkg_setup
+
+	JAVA_PKG_WANT_BUILD_VM="openjdk-${SLOT} openjdk-bin-${SLOT}"
+	JAVA_PKG_WANT_SOURCE="${SLOT}"
+	JAVA_PKG_WANT_TARGET="${SLOT}"
+
+	# The nastiness below is necessary while the gentoo-vm USE flag is
+	# masked. First we call java-pkg-2_pkg_setup if it looks like the
+	# flag was unmasked against one of the possible build VMs. If not,
+	# we try finding one of them in their expected locations. This would
+	# have been slightly less messy if openjdk-bin had been installed to
+	# /opt/${PN}-${SLOT} or if there was a mechanism to install a VM env
+	# file but disable it so that it would not normally be selectable.
+
+	local vm
+	for vm in ${JAVA_PKG_WANT_BUILD_VM}; do
+		if [[ -d ${EPREFIX}/usr/lib/jvm/${vm} ]]; then
+			java-pkg-2_pkg_setup
+			return
+		fi
+	done
+
+	if has_version --host-root dev-java/openjdk:${SLOT}; then
+		export JDK_HOME=${EPREFIX}/usr/$(get_libdir)/openjdk-${SLOT}
+	else
+		if [[ ${MERGE_TYPE} != "binary" ]]; then
+			JDK_HOME=$(best_version --host-root dev-java/openjdk-bin:${SLOT})
+			[[ -n ${JDK_HOME} ]] || die "Build VM not found!"
+			JDK_HOME=${JDK_HOME#*/}
+			JDK_HOME=${EPREFIX}/opt/${JDK_HOME%-r*}
+			export JDK_HOME
+		fi
+	fi
+}
+
+src_prepare() {
+	default
+	chmod +x configure || die
+}
+
+src_configure() {
+	# Work around stack alignment issue, bug #647954. in case we ever have x86
+	use x86 && append-flags -mincoming-stack-boundary=2
+
+	# Work around -fno-common ( GCC10 default ), bug #713180
+	append-flags -fcommon
+
+	# Enabling full docs appears to break doc building. If not
+	# explicitly disabled, the flag will get auto-enabled if pandoc and
+	# graphviz are detected. pandoc has loads of dependencies anyway.
+
+	local myconf=(
+		--disable-ccache
+		--enable-full-docs=no
+		--with-boot-jdk="${JDK_HOME}"
+		--with-extra-cflags="${CFLAGS}"
+		--with-extra-cxxflags="${CXXFLAGS}"
+		--with-extra-ldflags="${LDFLAGS}"
+		--with-giflib=system
+		--with-lcms=system
+		--with-libjpeg=system
+		--with-libpng=system
+		--with-native-debug-symbols=$(usex debug internal none)
+		--with-vendor-name="Gentoo"
+		--with-vendor-url="https://gentoo.org"
+		--with-vendor-bug-url="https://bugs.gentoo.org"
+		--with-vendor-vm-bug-url="https://bugs.openjdk.java.net"
+		--with-vendor-version-string="${PVR}"
+		--with-version-pre=""
+		--with-version-string="${PV%_p*}"
+		--with-version-build="${PV#*_p}"
+		--with-zlib=system
+		--enable-dtrace=$(usex systemtap yes no)
+		--enable-headless-only=$(usex headless-awt yes no)
+		$(tc-is-clang && echo "--with-toolchain-type=clang")
+	)
+
+	if use javafx; then
+		local zip="${EROOT%/}/usr/$(get_libdir)/openjfx-${SLOT}/javafx-exports.zip"
+		if [[ -r ${zip} ]]; then
+			myconf+=( --with-import-modules="${zip}" )
+		else
+			die "${zip} not found or not readable"
+		fi
+	fi
+
+	# PaX breaks pch, bug #601016
+	if use pch && ! host-is-pax; then
+		myconf+=( --enable-precompiled-headers )
+	else
+		myconf+=( --disable-precompiled-headers )
+	fi
+
+	(
+		unset _JAVA_OPTIONS JAVA JAVA_TOOL_OPTIONS JAVAC XARGS
+		CFLAGS= CXXFLAGS= LDFLAGS= \
+		CONFIG_SITE=/dev/null \
+		econf "${myconf[@]}"
+	)
+}
+
+src_compile() {
+	local myemakeargs=(
+		JOBS=$(makeopts_jobs)
+		LOG=debug
+		CFLAGS_WARNINGS_ARE_ERRORS= # No -Werror
+		$(usex doc docs '')
+		$(usex jbootstrap bootcycle-images product-images)
+	)
+	emake "${myemakeargs[@]}" -j1 #nowarn
+}
+
+src_install() {
+	local dest="/usr/$(get_libdir)/${PN}-${SLOT}"
+	local ddest="${ED}${dest#/}"
+
+	cd "${S}"/build/*-release/images/jdk || die
+
+	# Create files used as storage for system preferences.
+	mkdir .systemPrefs || die
+	touch .systemPrefs/.system.lock || die
+	touch .systemPrefs/.systemRootModFile || die
+
+	# Oracle and IcedTea have libjsoundalsa.so depending on
+	# libasound.so.2 but OpenJDK only has libjsound.so. Weird.
+	if ! use alsa ; then
+		rm -v lib/libjsound.* || die
+	fi
+
+	if ! use examples ; then
+		rm -vr demo/ || die
+	fi
+
+	if ! use source ; then
+		rm -v lib/src.zip || die
+	fi
+
+	rm -v lib/security/cacerts || die
+
+	dodir "${dest}"
+	cp -pPR * "${ddest}" || die
+
+	dosym ../../../../../etc/ssl/certs/java/cacerts "${dest}"/lib/security/cacerts
+
+	# must be done before running itself
+	java-vm_set-pax-markings "${ddest}"
+
+	einfo "Creating the Class Data Sharing archives and disabling usage tracking"
+	"${ddest}/bin/java" -server -Xshare:dump -Djdk.disableLastUsageTracking || die
+
+	use gentoo-vm && java-vm_install-env "${FILESDIR}"/${PN}-${SLOT}.env.sh
+	java-vm_revdep-mask
+	java-vm_sandbox-predict /dev/random /proc/self/coredump_filter
+
+	if use doc ; then
+		docinto html
+		dodoc -r "${S}"/build/*-release/images/docs/*
+		dosym ../../../usr/share/doc/"${PF}" /usr/share/doc/"${PN}-${SLOT}"
+	fi
+}
+
+pkg_postinst() {
+	java-vm-2_pkg_postinst
+
+	if use gentoo-vm ; then
+		ewarn "WARNING! You have enabled the gentoo-vm USE flag, making this JDK"
+		ewarn "recognised by the system. This will almost certainly break"
+		ewarn "many java ebuilds as they are not ready for openjdk-11"
+	else
+		ewarn "The experimental gentoo-vm USE flag has not been enabled so this JDK"
+		ewarn "will not be recognised by the system. For example, simply calling"
+		ewarn "\"java\" will launch a different JVM. This is necessary until Gentoo"
+		ewarn "fully supports Java ${SLOT}. This JDK must therefore be invoked using its"
+		ewarn "absolute location under ${EPREFIX}/usr/$(get_libdir)/${PN}-${SLOT}."
+	fi
+}
diff --git a/dev-java/openjdk/openjdk-11.0.9_p11.ebuild b/dev-java/openjdk/openjdk-11.0.9_p11.ebuild
new file mode 100644
index 000000000000..ca908bb4c188
--- /dev/null
+++ b/dev-java/openjdk/openjdk-11.0.9_p11.ebuild
@@ -0,0 +1,272 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit autotools check-reqs flag-o-matic java-pkg-2 java-vm-2 multiprocessing pax-utils toolchain-funcs
+
+# we need -ga tag to fetch tarball and unpack it, but exact number everywhere else to
+# set build version properly
+MY_PV="${PV%_p*}-ga"
+SLOT="${MY_PV%%[.+]*}"
+
+DESCRIPTION="Open source implementation of the Java programming language"
+HOMEPAGE="https://openjdk.java.net"
+SRC_URI="https://hg.${PN}.java.net/jdk-updates/jdk${SLOT}u/archive/jdk-${MY_PV}.tar.bz2 -> ${P}.tar.bz2"
+
+LICENSE="GPL-2"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64"
+
+IUSE="alsa cups debug doc examples gentoo-vm headless-awt javafx +jbootstrap +pch selinux source systemtap"
+
+COMMON_DEPEND="
+	media-libs/freetype:2=
+	media-libs/giflib:0/7
+	media-libs/libpng:0=
+	media-libs/lcms:2=
+	sys-libs/zlib
+	virtual/jpeg:0=
+	systemtap? ( dev-util/systemtap )
+"
+
+# Many libs are required to build, but not to run, make is possible to remove
+# by listing conditionally in RDEPEND unconditionally in DEPEND
+RDEPEND="
+	${COMMON_DEPEND}
+	>=sys-apps/baselayout-java-0.1.0-r1
+	!headless-awt? (
+		x11-libs/libX11
+		x11-libs/libXext
+		x11-libs/libXi
+		x11-libs/libXrandr
+		x11-libs/libXrender
+		x11-libs/libXt
+		x11-libs/libXtst
+	)
+	alsa? ( media-libs/alsa-lib )
+	cups? ( net-print/cups )
+	selinux? ( sec-policy/selinux-java )
+"
+
+DEPEND="
+	${COMMON_DEPEND}
+	app-arch/zip
+	media-libs/alsa-lib
+	net-print/cups
+	x11-base/xorg-proto
+	x11-libs/libX11
+	x11-libs/libXext
+	x11-libs/libXi
+	x11-libs/libXrandr
+	x11-libs/libXrender
+	x11-libs/libXt
+	x11-libs/libXtst
+	javafx? ( dev-java/openjfx:${SLOT}= )
+	|| (
+		dev-java/openjdk-bin:${SLOT}
+		dev-java/openjdk:${SLOT}
+	)
+"
+
+REQUIRED_USE="javafx? ( alsa !headless-awt )"
+
+S="${WORKDIR}/jdk${SLOT}u-jdk-${MY_PV}"
+
+# The space required to build varies wildly depending on USE flags,
+# ranging from 2GB to 16GB. This function is certainly not exact but
+# should be close enough to be useful.
+openjdk_check_requirements() {
+	local M
+	M=2048
+	M=$(( $(usex jbootstrap 2 1) * $M ))
+	M=$(( $(usex debug 3 1) * $M ))
+	M=$(( $(usex doc 320 0) + $(usex source 128 0) + 192 + $M ))
+
+	CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+pkg_pretend() {
+	openjdk_check_requirements
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		has ccache ${FEATURES} && die "FEATURES=ccache doesn't work with ${PN}, bug #677876"
+	fi
+}
+
+pkg_setup() {
+	openjdk_check_requirements
+	java-vm-2_pkg_setup
+
+	JAVA_PKG_WANT_BUILD_VM="openjdk-${SLOT} openjdk-bin-${SLOT}"
+	JAVA_PKG_WANT_SOURCE="${SLOT}"
+	JAVA_PKG_WANT_TARGET="${SLOT}"
+
+	# The nastiness below is necessary while the gentoo-vm USE flag is
+	# masked. First we call java-pkg-2_pkg_setup if it looks like the
+	# flag was unmasked against one of the possible build VMs. If not,
+	# we try finding one of them in their expected locations. This would
+	# have been slightly less messy if openjdk-bin had been installed to
+	# /opt/${PN}-${SLOT} or if there was a mechanism to install a VM env
+	# file but disable it so that it would not normally be selectable.
+
+	local vm
+	for vm in ${JAVA_PKG_WANT_BUILD_VM}; do
+		if [[ -d ${EPREFIX}/usr/lib/jvm/${vm} ]]; then
+			java-pkg-2_pkg_setup
+			return
+		fi
+	done
+
+	if has_version --host-root dev-java/openjdk:${SLOT}; then
+		export JDK_HOME=${EPREFIX}/usr/$(get_libdir)/openjdk-${SLOT}
+	else
+		if [[ ${MERGE_TYPE} != "binary" ]]; then
+			JDK_HOME=$(best_version --host-root dev-java/openjdk-bin:${SLOT})
+			[[ -n ${JDK_HOME} ]] || die "Build VM not found!"
+			JDK_HOME=${JDK_HOME#*/}
+			JDK_HOME=${EPREFIX}/opt/${JDK_HOME%-r*}
+			export JDK_HOME
+		fi
+	fi
+}
+
+src_prepare() {
+	default
+	chmod +x configure || die
+}
+
+src_configure() {
+	# Work around stack alignment issue, bug #647954. in case we ever have x86
+	use x86 && append-flags -mincoming-stack-boundary=2
+
+	# Work around -fno-common ( GCC10 default ), bug #713180
+	append-flags -fcommon
+
+	# Enabling full docs appears to break doc building. If not
+	# explicitly disabled, the flag will get auto-enabled if pandoc and
+	# graphviz are detected. pandoc has loads of dependencies anyway.
+
+	local myconf=(
+		--disable-ccache
+		--enable-full-docs=no
+		--with-boot-jdk="${JDK_HOME}"
+		--with-extra-cflags="${CFLAGS}"
+		--with-extra-cxxflags="${CXXFLAGS}"
+		--with-extra-ldflags="${LDFLAGS}"
+		--with-giflib=system
+		--with-lcms=system
+		--with-libjpeg=system
+		--with-libpng=system
+		--with-native-debug-symbols=$(usex debug internal none)
+		--with-vendor-name="Gentoo"
+		--with-vendor-url="https://gentoo.org"
+		--with-vendor-bug-url="https://bugs.gentoo.org"
+		--with-vendor-vm-bug-url="https://bugs.openjdk.java.net"
+		--with-vendor-version-string="${PVR}"
+		--with-version-pre=""
+		--with-version-string="${PV%_p*}"
+		--with-version-build="${PV#*_p}"
+		--with-zlib=system
+		--enable-dtrace=$(usex systemtap yes no)
+		--enable-headless-only=$(usex headless-awt yes no)
+		$(tc-is-clang && echo "--with-toolchain-type=clang")
+	)
+
+	if use javafx; then
+		local zip="${EROOT%/}/usr/$(get_libdir)/openjfx-${SLOT}/javafx-exports.zip"
+		if [[ -r ${zip} ]]; then
+			myconf+=( --with-import-modules="${zip}" )
+		else
+			die "${zip} not found or not readable"
+		fi
+	fi
+
+	# PaX breaks pch, bug #601016
+	if use pch && ! host-is-pax; then
+		myconf+=( --enable-precompiled-headers )
+	else
+		myconf+=( --disable-precompiled-headers )
+	fi
+
+	(
+		unset _JAVA_OPTIONS JAVA JAVA_TOOL_OPTIONS JAVAC XARGS
+		CFLAGS= CXXFLAGS= LDFLAGS= \
+		CONFIG_SITE=/dev/null \
+		econf "${myconf[@]}"
+	)
+}
+
+src_compile() {
+	local myemakeargs=(
+		JOBS=$(makeopts_jobs)
+		LOG=debug
+		CFLAGS_WARNINGS_ARE_ERRORS= # No -Werror
+		$(usex doc docs '')
+		$(usex jbootstrap bootcycle-images product-images)
+	)
+	emake "${myemakeargs[@]}" -j1 #nowarn
+}
+
+src_install() {
+	local dest="/usr/$(get_libdir)/${PN}-${SLOT}"
+	local ddest="${ED}${dest#/}"
+
+	cd "${S}"/build/*-release/images/jdk || die
+
+	# Create files used as storage for system preferences.
+	mkdir .systemPrefs || die
+	touch .systemPrefs/.system.lock || die
+	touch .systemPrefs/.systemRootModFile || die
+
+	# Oracle and IcedTea have libjsoundalsa.so depending on
+	# libasound.so.2 but OpenJDK only has libjsound.so. Weird.
+	if ! use alsa ; then
+		rm -v lib/libjsound.* || die
+	fi
+
+	if ! use examples ; then
+		rm -vr demo/ || die
+	fi
+
+	if ! use source ; then
+		rm -v lib/src.zip || die
+	fi
+
+	rm -v lib/security/cacerts || die
+
+	dodir "${dest}"
+	cp -pPR * "${ddest}" || die
+
+	dosym ../../../../../etc/ssl/certs/java/cacerts "${dest}"/lib/security/cacerts
+
+	# must be done before running itself
+	java-vm_set-pax-markings "${ddest}"
+
+	einfo "Creating the Class Data Sharing archives and disabling usage tracking"
+	"${ddest}/bin/java" -server -Xshare:dump -Djdk.disableLastUsageTracking || die
+
+	use gentoo-vm && java-vm_install-env "${FILESDIR}"/${PN}-${SLOT}.env.sh
+	java-vm_revdep-mask
+	java-vm_sandbox-predict /dev/random /proc/self/coredump_filter
+
+	if use doc ; then
+		docinto html
+		dodoc -r "${S}"/build/*-release/images/docs/*
+		dosym ../../../usr/share/doc/"${PF}" /usr/share/doc/"${PN}-${SLOT}"
+	fi
+}
+
+pkg_postinst() {
+	java-vm-2_pkg_postinst
+
+	if use gentoo-vm ; then
+		ewarn "WARNING! You have enabled the gentoo-vm USE flag, making this JDK"
+		ewarn "recognised by the system. This will almost certainly break"
+		ewarn "many java ebuilds as they are not ready for openjdk-11"
+	else
+		ewarn "The experimental gentoo-vm USE flag has not been enabled so this JDK"
+		ewarn "will not be recognised by the system. For example, simply calling"
+		ewarn "\"java\" will launch a different JVM. This is necessary until Gentoo"
+		ewarn "fully supports Java ${SLOT}. This JDK must therefore be invoked using its"
+		ewarn "absolute location under ${EPREFIX}/usr/$(get_libdir)/${PN}-${SLOT}."
+	fi
+}