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diff --git a/dev-lang/go/go-1.4.2.ebuild b/dev-lang/go/go-1.4.2.ebuild
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+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+export CTARGET=${CTARGET:-${CHOST}}
+
+inherit eutils toolchain-funcs
+
+if [[ ${PV} = 9999 ]]; then
+ EGIT_REPO_URI="git://github.com/golang/go.git"
+ inherit git-r3
+else
+ SRC_URI="https://storage.googleapis.com/golang/go${PV}.src.tar.gz"
+ # Upstream only supports go on amd64, arm and x86 architectures.
+ KEYWORDS="-* amd64 arm x86 ~amd64-fbsd ~x86-fbsd ~x64-macos ~x86-macos"
+fi
+
+DESCRIPTION="A concurrent garbage collected and typesafe programming language"
+HOMEPAGE="http://www.golang.org"
+
+LICENSE="BSD"
+SLOT="0"
+IUSE=""
+
+DEPEND=""
+RDEPEND=""
+
+# These test data objects have writable/executable stacks.
+QA_EXECSTACK="
+ usr/lib/go/src/debug/elf/testdata/go-relocation-test-gcc482-aarch64.obj
+ usr/lib/go/src/debug/elf/testdata/gcc-amd64-openbsd-debug-with-rela.obj"
+
+ REQUIRES_EXCLUDE="/usr/lib/go/src/debug/elf/testdata/*"
+
+# The tools in /usr/lib/go should not cause the multilib-strict check to fail.
+QA_MULTILIB_PATHS="usr/lib/go/pkg/tool/.*/.*"
+
+# The go language uses *.a files which are _NOT_ libraries and should not be
+# stripped.
+STRIP_MASK="/usr/lib/go/pkg/linux*/*.a /usr/lib/go/pkg/freebsd*/*.a /usr/lib/go/pkg/darwin*/*.a"
+
+if [[ ${PV} != 9999 ]]; then
+ S="${WORKDIR}"/go
+fi
+
+src_prepare()
+{
+ if [[ ${PV} != 9999 ]]; then
+ sed -i -e 's#"-Werror",##g' src/cmd/dist/build.c ||
+ die "sed failed"
+ fi
+ epatch_user
+}
+
+src_compile()
+{
+ export GOROOT_FINAL="${EPREFIX}"/usr/lib/go
+ export GOROOT="$(pwd)"
+ export GOBIN="${GOROOT}/bin"
+ if [[ $CTARGET = armv5* ]]
+ then
+ export GOARM=5
+ fi
+ tc-export CC
+
+ cd src
+ ./make.bash || die "build failed"
+}
+
+src_test()
+{
+ cd src
+ PATH="${GOBIN}:${PATH}" \
+ ./run.bash --no-rebuild --banner || die "tests failed"
+}
+
+src_install()
+{
+ dobin bin/*
+ dodoc AUTHORS CONTRIBUTORS PATENTS README
+
+ dodir /usr/lib/go
+ insinto /usr/lib/go
+
+ # There is a known issue which requires the source tree to be installed [1].
+ # Once this is fixed, we can consider using the doc use flag to control
+ # installing the doc and src directories.
+ # [1] https://golang.org/issue/2775
+ doins -r doc include lib pkg src
+ fperms -R +x /usr/lib/go/pkg/tool
+}
+
+pkg_preinst()
+{
+ has_version '<dev-lang/go-1.4' &&
+ export had_support_files=true ||
+ export had_support_files=false
+}
+
+pkg_postinst()
+{
+ # If the go tool sees a package file timestamped older than a dependancy it
+ # will rebuild that file. So, in order to stop go from rebuilding lots of
+ # packages for every build we need to fix the timestamps. The compiler and
+ # linker are also checked - so we need to fix them too.
+ ebegin "fixing timestamps to avoid unnecessary rebuilds"
+ tref="usr/lib/go/pkg/*/runtime.a"
+ find "${EROOT}"usr/lib/go -type f \
+ -exec touch -r "${EROOT}"${tref} {} \;
+ eend $?
+
+ if [[ ${PV} != 9999 && -n ${REPLACING_VERSIONS} &&
+ ${REPLACING_VERSIONS} != ${PV} ]]; then
+ elog "Release notes are located at http://golang.org/doc/go1.4"
+ fi
+
+ if $had_support_files; then
+ ewarn
+ ewarn "All editor support, IDE support, shell completion"
+ ewarn "support, etc has been removed from the go package"
+ ewarn "upstream."
+ ewarn "For more information on which support is available, see"
+ ewarn "the following URL:"
+ ewarn "https://github.com/golang/go/wiki/IDEsAndTextEditorPlugins"
+ fi
+}