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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit autotools flag-o-matic toolchain-funcs multilib pax-utils

DESCRIPTION="An open-source memory debugger for GNU/Linux"
HOMEPAGE="http://www.valgrind.org"
LICENSE="GPL-2"
SLOT="0"
IUSE="mpi"

if [[ ${PV} == "9999" ]]; then
	EGIT_REPO_URI="https://sourceware.org/git/${PN}.git"
	inherit git-r3
else
	SRC_URI="ftp://sourceware.org/pub/valgrind/${P}.tar.bz2"
	KEYWORDS="-* amd64 arm arm64 ppc ppc64 x86 ~amd64-linux ~x86-linux ~x64-macos ~x86-macos ~x64-solaris"
fi

DEPEND="mpi? ( virtual/mpi )"
RDEPEND="${DEPEND}"

src_prepare() {
	# Correct hard coded doc location
	sed -i -e "s:doc/valgrind:doc/${PF}:" docs/Makefile.am || die

	# Don't force multiarch stuff on OSX, bug #306467
	sed -i -e 's:-arch \(i386\|x86_64\)::g' Makefile.all.am || die

	# Respect CFLAGS, LDFLAGS
	eapply "${FILESDIR}"/${PN}-3.7.0-respect-flags.patch

	eapply "${FILESDIR}"/${PN}-3.15.0-Build-ldst_multiple-test-with-fno-pie.patch

	if [[ ${CHOST} == *-solaris* ]] ; then
		# upstream doesn't support this, but we don't build with
		# Sun/Oracle ld, we have a GNU toolchain, so get some things
		# working the Linux/GNU way
		find "${S}" -name "Makefile.am" -o -name "Makefile.tool.am" | xargs \
			sed -i -e 's:-M,/usr/lib/ld/map.noexstk:-z,noexecstack:' || die
		cp "${S}"/coregrind/link_tool_exe_{linux,solaris}.in
	fi

	# Allow users to test their own patches
	eapply_user

	# Regenerate autotools files
	eautoreconf
}

src_configure() {
	local myconf=()

	# Respect ar, bug #468114
	tc-export AR

	# -fomit-frame-pointer	"Assembler messages: Error: junk `8' after expression"
	#                       while compiling insn_sse.c in none/tests/x86
	# -fstack-protector     more undefined references to __guard and __stack_smash_handler
	#                       because valgrind doesn't link to glibc (bug #114347)
	# -fstack-protector-all    Fails same way as -fstack-protector/-fstack-protector-strong.
	#                          Note: -fstack-protector-explicit is a no-op for Valgrind, no need to strip it
	# -fstack-protector-strong See -fstack-protector (bug #620402)
	# -m64 -mx32			for multilib-portage, bug #398825
	# -ggdb3                segmentation fault on startup
	filter-flags -fomit-frame-pointer
	filter-flags -fstack-protector
	filter-flags -fstack-protector-all
	filter-flags -fstack-protector-strong
	filter-flags -m64 -mx32
	replace-flags -ggdb3 -ggdb2

	if use amd64 || use ppc64; then
		! has_multilib_profile && myconf+=("--enable-only64bit")
	fi

	# Force bitness on darwin, bug #306467
	use x86-macos && myconf+=("--enable-only32bit")
	use x64-macos && myconf+=("--enable-only64bit")

	# Don't use mpicc unless the user asked for it (bug #258832)
	if ! use mpi; then
		myconf+=("--without-mpicc")
	fi

	econf "${myconf[@]}"
}

src_install() {
	default

	if [[ ${PV} == "9999" ]]; then
		# Otherwise FAQ.txt won't exist:
		emake -C docs FAQ.txt
		mv docs/FAQ.txt . || die "Couldn't move FAQ.txt"
	fi

	dodoc FAQ.txt

	pax-mark m "${ED}"/usr/$(get_libdir)/valgrind/*-*-linux

	if [[ ${CHOST} == *-darwin* ]] ; then
		# fix install_names on shared libraries, can't turn them into bundles,
		# as dyld won't load them any more then, bug #306467
		local l
		for l in "${ED}"/usr/lib/valgrind/*.so ; do
			install_name_tool -id "${EPREFIX}"/usr/lib/valgrind/${l##*/} "${l}"
		done
	fi
}

pkg_postinst() {
	elog "Valgrind will not work if glibc does not have debug symbols."
	elog "To fix this you can add splitdebug to FEATURES in make.conf"
	elog "and remerge glibc.  See:"
	elog "https://bugs.gentoo.org/show_bug.cgi?id=214065"
	elog "https://bugs.gentoo.org/show_bug.cgi?id=274771"
	elog "https://bugs.gentoo.org/show_bug.cgi?id=388703"
}