--- /dev/null
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI="5"
+
+PYTHON_COMPAT=( python2_7 )
+inherit versionator eutils toolchain-funcs python-single-r1 linux-info
+
+MY_PV="${PV/_/-}"
+MY_PV="${MY_PV/-pre/-git}"
+
+DESCRIPTION="Userland tools for Linux Performance Counters"
+HOMEPAGE="http://perf.wiki.kernel.org/"
+
+LINUX_V="${PV:0:1}.x"
+if [[ ${PV} == *_rc* ]] ; then
+ LINUX_VER=$(get_version_component_range 1-2).$(($(get_version_component_range 3)-1))
+ PATCH_VERSION=$(get_version_component_range 1-3)
+ LINUX_PATCH=patch-${PV//_/-}.xz
+ SRC_URI="mirror://kernel/linux/kernel/v${LINUX_V}/testing/${LINUX_PATCH}
+ mirror://kernel/linux/kernel/v${LINUX_V}/testing/v${PATCH_VERSION}/${LINUX_PATCH}"
+else
+ VER_COUNT=$(get_version_component_count)
+ if [[ ${VER_COUNT} -gt 2 ]] ; then
+ # stable-release series
+ LINUX_VER=$(get_version_component_range 1-2)
+ LINUX_PATCH=patch-${PV}.xz
+ SRC_URI="mirror://kernel/linux/kernel/v${LINUX_V}/${LINUX_PATCH}"
+ else
+ LINUX_VER=${PV}
+ SRC_URI=""
+ fi
+fi
+
+LINUX_SOURCES="linux-${LINUX_VER}.tar.xz"
+SRC_URI+=" mirror://kernel/linux/kernel/v${LINUX_V}/${LINUX_SOURCES}"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~ppc ~x86"
+IUSE="audit debug +demangle +doc gtk numa perl python slang unwind"
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+RDEPEND="audit? ( sys-process/audit )
+ demangle? ( sys-devel/binutils:= )
+ gtk? ( x11-libs/gtk+:2 )
+ numa? ( sys-process/numactl )
+ perl? ( dev-lang/perl )
+ slang? ( dev-libs/newt )
+ unwind? ( sys-libs/libunwind )
+ dev-libs/elfutils"
+DEPEND="${RDEPEND}
+ ${LINUX_PATCH+dev-util/patchutils}
+ sys-devel/bison
+ sys-devel/flex
+ doc? (
+ app-text/asciidoc
+ app-text/sgml-common
+ app-text/xmlto
+ sys-process/time
+ )
+ python? ( ${PYTHON_DEPS} )"
+
+S_K="${WORKDIR}/linux-${LINUX_VER}"
+S="${S_K}/tools/perf"
+
+CONFIG_CHECK="~PERF_EVENTS ~KALLSYMS"
+
+pkg_setup() {
+ linux-info_pkg_setup
+ use python && python-single-r1_pkg_setup
+}
+
+src_unpack() {
+ local paths=(
+ tools/build tools/include tools/lib tools/perf tools/scripts
+ include lib "arch/*/include" "arch/*/lib"
+ )
+
+ # We expect the tar implementation to support the -j option (both
+ # GNU tar and libarchive's tar support that).
+ echo ">>> Unpacking ${LINUX_SOURCES} (${paths[*]}) to ${PWD}"
+ tar --wildcards -xpf "${DISTDIR}"/${LINUX_SOURCES} \
+ "${paths[@]/#/linux-${LINUX_VER}/}" || die
+
+ if [[ -n ${LINUX_PATCH} ]] ; then
+ eshopts_push -o noglob
+ ebegin "Filtering partial source patch"
+ filterdiff -p1 ${paths[@]/#/-i } -z "${DISTDIR}"/${LINUX_PATCH} \
+ > ${P}.patch || die
+ eend $? || die "filterdiff failed"
+ eshopts_pop
+ fi
+
+ local a
+ for a in ${A}; do
+ [[ ${a} == ${LINUX_SOURCES} ]] && continue
+ [[ ${a} == ${LINUX_PATCH} ]] && continue
+ unpack ${a}
+ done
+}
+
+src_prepare() {
+ if [[ -n ${LINUX_PATCH} ]] ; then
+ cd "${S_K}"
+ epatch "${WORKDIR}"/${P}.patch
+ fi
+
+ # Drop some upstream too-developer-oriented flags and fix the
+ # Makefile in general
+ sed -i \
+ -e 's:-Werror::' \
+ -e 's:-ggdb3::' \
+ -e 's:-fstack-protector-all::' \
+ -e 's:^LDFLAGS =:EXTLIBS +=:' \
+ -e '/\(PERL\|PYTHON\)_EMBED_LDOPTS/s:ALL_LDFLAGS +=:EXTLIBS +=:' \
+ -e '/-x c - /s:\$(ALL_LDFLAGS):\0 $(EXTLIBS):' \
+ -e '/^ALL_CFLAGS =/s:$: $(CFLAGS_OPTIMIZE):' \
+ -e '/^ALL_LDFLAGS =/s:$: $(LDFLAGS_OPTIMIZE):' \
+ -e 's:$(sysconfdir_SQ)/bash_completion.d:/usr/share/bash-completion:' \
+ "${S}"/Makefile || die
+ sed -i -e 's:-Werror::' "${S_K}"/tools/lib/api/Makefile || die
+ sed -i \
+ -e '/.FORCE-PERF-VERSION-FILE/s,.FORCE-PERF-VERSION-FILE,,g' \
+ "${S}"/Makefile \
+ "${S}"/Documentation/Makefile || die
+
+ # Avoid the call to make kernelversion
+ echo "#define PERF_VERSION \"${MY_PV}\"" > PERF-VERSION-FILE
+
+ # The code likes to compile local assembly files which lack ELF markings.
+ find -name '*.S' -exec sed -i '$a.section .note.GNU-stack,"",%progbits' {} +
+}
+
+puse() { usex $1 "" no; }
+perf_make() {
+ # The arch parsing is a bit funky. The perf tools package is integrated
+ # into the kernel, so it wants an ARCH that looks like the kernel arch,
+ # but it also wants to know about the split value -- i386/x86_64 vs just
+ # x86. We can get that by telling the func to use an older linux version.
+ # It's kind of a hack, but not that bad ...
+ # prefix="/usr" bindir_relative="bin" \
+ local arch=$(tc-arch-kernel)
+ emake V=1 \
+ CC="$(tc-getCC)" AR="$(tc-getAR)" \
+ CFLAGS_OPTIMIZE="${CFLAGS}" \
+ LDFLAGS_OPTIMIZE="${LDFLAGS}" \
+ ARCH="${arch}" \
+ NO_DEMANGLE=$(puse demangle) \
+ NO_GTK2=$(puse gtk) \
+ NO_LIBAUDIT=$(puse audit) \
+ NO_LIBPERL=$(puse perl) \
+ NO_LIBPYTHON=$(puse python) \
+ NO_LIBUNWIND=$(puse unwind) \
+ NO_NEWT=$(puse slang) \
+ NO_LIBNUMA=$(puse numa) \
+ WERROR=0 \
+ "$@"
+}
+
+src_compile() {
+ perf_make -f Makefile.perf
+ use doc && perf_make -C Documentation
+}
+
+src_test() {
+ :
+}
+
+src_install() {
+ perf_make -f Makefile.perf install DESTDIR="${D}"
+
+ dodoc CREDITS
+
+ dodoc *txt Documentation/*.txt
+ if use doc ; then
+ dohtml Documentation/*.html
+ doman Documentation/*.1
+ fi
+}
+
+pkg_postinst() {
+ if ! use doc ; then
+ elog "Without the doc USE flag you won't get any documentation nor man pages."
+ elog "And without man pages, you won't get any --help output for perf and its"
+ elog "sub-tools."
+ fi
+}
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