# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit multilib-minimal preserve-libs

MY_PV=${PV/_rc/-rc}
MY_P=${PN}-${MY_PV}

DESCRIPTION="a portable, high level programming interface to various calling conventions"
HOMEPAGE="https://sourceware.org/libffi/"
SRC_URI="https://github.com/libffi/libffi/releases/download/v${MY_PV}/${MY_P}.tar.gz
	experimental-loong? ( https://dev.gentoo.org/~xen0n/distfiles/${MY_P}-loongarch64-20220428.patch.xz )"
S="${WORKDIR}"/${MY_P}

LICENSE="MIT"
# This is a core package which is depended on by e.g. Python
# Please use preserve-libs.eclass in pkg_{pre,post}inst to cover users
# with FEATURES="-preserved-libs" or another package manager if SONAME
# changes.
SLOT="0/8" # SONAME=libffi.so.8
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
IUSE="debug exec-static-trampoline experimental-loong pax-kernel static-libs test"

RESTRICT="!test? ( test )"
BDEPEND="test? ( dev-util/dejagnu )"

DOCS="ChangeLog* README.md"

ECONF_SOURCE=${S}

PATCHES=( "${FILESDIR}/libffi-3.4.2-backport-pr-722.patch" ) # bug 827215

src_prepare() {
	if use experimental-loong; then
		PATCHES+=( "${WORKDIR}/${MY_P}-loongarch64-20220428.patch" )
	fi

	default
	if [[ ${CHOST} == arm64-*-darwin* ]] ; then
		# ensure we use aarch64 asm, not x86 on arm64
		sed -i -e 's/aarch64\*-\*-\*/arm64*-*-*|&/' \
			configure configure.host || die
	fi
}

multilib_src_configure() {
	# --includedir= path maintains a few properties:
	# 1. have stable name across libffi versions: some packages like
	#    dev-lang/ghc or kde-frameworks/networkmanager-qt embed
	#    ${includedir} at build-time. Don't require those to be
	#    rebuilt unless SONAME changes. bug #695788
	#
	#    We use /usr/.../${PN} (instead of former /usr/.../${P}).
	#
	# 2. have ${ABI}-specific location as ffi.h is target-dependent.
	#
	#    We use /usr/$(get_libdir)/... to have ABI identifier.
	econf \
		--includedir="${EPREFIX}"/usr/$(get_libdir)/${PN}/include \
		--disable-multi-os-directory \
		$(use_enable static-libs static) \
		$(use_enable exec-static-trampoline exec-static-tramp) \
		$(use_enable pax-kernel pax_emutramp) \
		$(use_enable debug)
}

multilib_src_install_all() {
	find "${ED}" -name "*.la" -delete || die
	einstalldocs
}

pkg_preinst() {
	preserve_old_lib /usr/$(get_libdir)/libffi.so.7
}

pkg_postinst() {
	preserve_old_lib_notify /usr/$(get_libdir)/libffi.so.7
}