From b237c50006ee7a8481fbdc6925a184a24ef04365 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrius=20=C5=A0tikonas?= <andrius@stikonas.eu>
Date: Sun, 1 Dec 2019 22:56:29 +0000
Subject: [PATCH] Add ebuild to rebuild jamvm with ecj 4.2

---
 dev-java/jamvm/jamvm-2.0.0-r100.ebuild | 136 +++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 dev-java/jamvm/jamvm-2.0.0-r100.ebuild

diff --git a/dev-java/jamvm/jamvm-2.0.0-r100.ebuild b/dev-java/jamvm/jamvm-2.0.0-r100.ebuild
new file mode 100644
index 0000000..c06dc18
--- /dev/null
+++ b/dev-java/jamvm/jamvm-2.0.0-r100.ebuild
@@ -0,0 +1,136 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=5
+
+inherit eutils flag-o-matic multilib java-vm-2 autotools
+
+DESCRIPTION="An extremely small and specification-compliant virtual machine"
+HOMEPAGE="http://jamvm.sourceforge.net/"
+SRC_URI="mirror://sourceforge/${PN}/${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="bootstrap"
+KEYWORDS="amd64"
+IUSE="libffi"
+
+DEPEND="dev-java/gnu-classpath:bootstrap
+	dev-java/eclipse-ecj:4.2
+	libffi? ( virtual/libffi )
+	ppc64? ( virtual/libffi )
+	sparc? ( virtual/libffi )"
+RDEPEND="${DEPEND}"
+
+PATCHES=(
+	"${FILESDIR}"/"${P}-classes-location.patch"
+	"${FILESDIR}"/"${P}-noexecstack.patch"
+)
+
+src_prepare() {
+	# without this patch, classes.zip is not found at runtime
+	epatch "${PATCHES[@]}"
+
+	sed -i -e "s/return CLASSPATH_INSTALL_DIR\"\/lib\/classpath\";/return CLASSPATH_INSTALL_DIR\"\/$(get_libdir)\/classpath\";/g" src/classlib/gnuclasspath/dll.c || die "Sed failed!"
+
+	eautoreconf
+
+	# These come precompiled.
+	# configure script uses detects the compiler
+	# from PATH. I guess we should compile this from source.
+	# Then just make sure not to hit
+	# https://bugs.gentoo.org/show_bug.cgi?id=163801
+	#
+	rm -v src/classlib/gnuclasspath/lib/classes.zip || die
+}
+
+src_configure() {
+	export CLASSPATH=/usr/share/classpath/glibj.zip
+
+	filter-flags "-fomit-frame-pointer"
+
+	if use ppc64 || use sparc || use libffi; then
+		append-cflags "$(pkg-config --cflags-only-I libffi)"
+	fi
+
+	local fficonf="--enable-ffi"
+	if { ! use ppc64 && ! use sparc; }; then
+		fficonf="$(use_enable libffi ffi)"
+	fi
+
+	econf ${fficonf} \
+		--disable-dependency-tracking \
+		--libdir="${EPREFIX}"/usr/$(get_libdir)/${PN} \
+		--includedir="${EPREFIX}"/usr/include/${PN} \
+		--with-classpath-install-dir="${EPREFIX}/usr"
+}
+
+src_compile() {
+	export LD_LIBRARY_PATH="${EPREFIX}/usr/$(get_libdir)/classpath"
+	default
+}
+
+create_launcher() {
+	local script="${D}/${INSTALL_DIR}/bin/${1}"
+	cat > "${script}" <<-EOF
+		#!/bin/sh
+		exec /usr/bin/jamvm \
+			-Xbootclasspath/p:/usr/share/classpath/tools.zip" \
+			gnu.classpath.tools.${1}.Main "\$@"
+	EOF
+	chmod +x "${script}" || die
+}
+
+src_install() {
+	local libdir=$(get_libdir)
+	local CLASSPATH_DIR=/usr/libexec/gnu-classpath
+	local JDK_DIR=/usr/${libdir}/${PN}-jdk
+
+	emake DESTDIR="${D}" install
+
+	dodoc ACKNOWLEDGEMENTS AUTHORS ChangeLog NEWS README
+
+	set_java_env "${FILESDIR}/${P}-env.file"
+
+	dodir ${JDK_DIR}/bin
+	dosym /usr/bin/jamvm ${JDK_DIR}/bin/java
+	for files in ${CLASSPATH_DIR}/g*; do
+		if [ $files = "${CLASSPATH_DIR}/bin/gjdoc" ] ; then
+			dosym $files ${JDK_DIR}/bin/javadoc || die
+		else
+			dosym $files \
+				${JDK_DIR}/bin/$(echo $files|sed "s#$(dirname $files)/g##") || die
+		fi
+	done
+
+	dodir ${JDK_DIR}/jre/lib
+	dosym /usr/share/classpath/glibj.zip ${JDK_DIR}/jre/lib/rt.jar
+	dodir ${JDK_DIR}/lib
+	dosym "${EPREFIX}/usr/share/classpath/tools.zip" ${JDK_DIR}/lib/tools.jar
+	dosym "${EPREFIX}/usr/include/classpath" ${JDK_DIR}/include
+
+	local ecj_jar="$(readlink "${EPREFIX}"/usr/share/eclipse-ecj/ecj.jar)"
+	exeinto ${JDK_DIR}/bin
+	sed -e "s#@JAVA@#/usr/bin/jamvm#" \
+		-e "s#@ECJ_JAR@#${ecj_jar}#" \
+		-e "s#@RT_JAR@#/usr/share/classpath/glibj.zip#" \
+		-e "s#@TOOLS_JAR@#/usr/share/classpath/tools.zip#" \
+		"${FILESDIR}"/"${P}-javac.in" | newexe - javac
+
+	local libarch="${ARCH}"
+	[ ${ARCH} == x86 ] && libarch="i386"
+	[ ${ARCH} == x86_64 ] && libarch="amd64"
+	dodir ${JDK_DIR}/jre/lib/${libarch}/client
+	dodir ${JDK_DIR}/jre/lib/${libarch}/server
+	dosym /usr/${libdir}/${PN}/libjvm.so ${JDK_DIR}/jre/lib/${libarch}/client/libjvm.so
+	dosym /usr/${libdir}/${PN}/libjvm.so ${JDK_DIR}/jre/lib/${libarch}/server/libjvm.so
+
+	# Can't use java-vm_set-pax-markings as doesn't work with symbolic links
+	# Ensure a PaX header is created.
+	local pax_markings="C"
+	# Usually disabling MPROTECT is sufficient.
+	local pax_markings+="m"
+	# On x86 for heap sizes over 700MB disable SEGMEXEC and PAGEEXEC as well.
+	use x86 && pax_markings+="sp"
+
+	pax-mark ${pax_markings} "${ED}"/usr/bin/jamvm
+}