sys-fs/fuse: disable -flto in ~arch ebuilds, bug #663518

Due to https://gcc.gnu.org/PR91186 gcc-9 in -lto mode does not do work
parition correctly for symbols introduced with `asm .symver`. That
causes linker failures in form of:
    <artificial>:(.text+0xdafe): undefined reference to `__fuse_read_cmd@'

To work it around we filter out -flto flags (already done
for masked ebuilds).

Bug: https://gcc.gnu.org/PR91186
Closes: https://bugs.gentoo.org/663518
Package-Manager: Portage-2.3.69, Repoman-2.3.16
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

sys-fs/fuse/fuse-2.9.9-r1.ebuild

@@ -0,0 +1,76 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+inherit flag-o-matic libtool linux-info udev toolchain-funcs
+
+DESCRIPTION="An interface for filesystems implemented in userspace"
+HOMEPAGE="https://github.com/libfuse/libfuse"
+SRC_URI="https://github.com/libfuse/libfuse/releases/download/${P}/${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-linux ~x86-linux"
+IUSE="examples kernel_linux kernel_FreeBSD static-libs"
+
+PDEPEND="kernel_FreeBSD? ( sys-fs/fuse4bsd )"
+DEPEND="virtual/pkgconfig"
+RDEPEND=">=sys-fs/fuse-common-3.3.0-r1"
+
+pkg_setup() {
+	if use kernel_linux ; then
+		if kernel_is lt 2 6 9 ; then
+			die "Your kernel is too old."
+		fi
+		CONFIG_CHECK="~FUSE_FS"
+		WARNING_FUSE_FS="You need to have FUSE module built to use user-mode utils"
+		linux-info_pkg_setup
+	fi
+}
+
+src_prepare() {
+	local PATCHES=( "${FILESDIR}"/${PN}-2.9.3-kernel-types.patch )
+	# sandbox violation with mtab writability wrt #438250
+	# don't sed configure.in without eautoreconf because of maintainer mode
+	sed -i 's:umount --fake:true --fake:' configure || die
+	elibtoolize
+
+	# lto not supported yet -- https://github.com/libfuse/libfuse/issues/198
+	# gcc-9 with -flto leads to link failures: #663518,
+	# https://gcc.gnu.org/PR91186
+	filter-flags -flto*
+
+	default
+}
+
+src_configure() {
+	econf \
+		INIT_D_PATH="${EPREFIX}/etc/init.d" \
+		MOUNT_FUSE_PATH="${EPREFIX}/sbin" \
+		UDEV_RULES_PATH="${EPREFIX}/$(get_udevdir)/rules.d" \
+		$(use_enable static-libs static) \
+		--disable-example
+}
+
+src_install() {
+	local DOCS=( AUTHORS ChangeLog README.md README.NFS NEWS doc/how-fuse-works doc/kernel.txt )
+	default
+
+	if use examples ; then
+		docinto examples
+		dodoc example/*
+	fi
+
+	if use kernel_FreeBSD ; then
+		insinto /usr/include/fuse
+		doins include/fuse_kernel.h
+	fi
+
+	find "${ED}" -name '*.la' -delete || die
+
+	# installed via fuse-common
+	rm -r "${ED}"/{etc,$(get_udevdir)} || die
+
+	# handled by the device manager
+	rm -r "${D}"/dev || die
+}