Сравнение libsigc++-2.12.0 с libsigc++-3.4.0

/usr/portage/dev-libs/libsigc++/libsigc++-3.4.0.ebuild 2023-10-09 14:52:29.528368351 +0300
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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inherit flag-o-matic gnome.org meson-multilib
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inherit gnome.org flag-o-matic meson-multilib
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DESCRIPTION="Typesafe callback system for standard C++"
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HOMEPAGE="https://libsigcplusplus.github.io/libsigcplusplus/
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	https://github.com/libsigcplusplus/libsigcplusplus"
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LICENSE="LGPL-2.1+"
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SLOT="2"
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SLOT="3"
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KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~loong ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
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IUSE="gtk-doc test"
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RESTRICT="!test? ( test )"
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DEPEND="test? ( dev-libs/boost[${MULTILIB_USEDEP}] )"
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BDEPEND="sys-devel/m4
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	gtk-doc? ( app-doc/doxygen[dot] )"
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BDEPEND="
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	gtk-doc? (
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		app-doc/doxygen[dot]
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		dev-lang/perl
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		dev-libs/libxslt
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	)
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"
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multilib_src_configure() {
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	filter-flags -fno-exceptions #84263
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	local -a emesonargs=(
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		$(meson_use test benchmark)
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		$(meson_native_use_bool gtk-doc build-documentation)
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	local emesonargs=(
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		-Dbuild-examples=false
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		$(meson_native_use_bool gtk-doc build-documentation)
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		$(meson_use test build-tests)
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	)
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	meson_src_configure
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}
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multilib_src_install_all() {
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	# Note: html docs are installed into /usr/share/doc/libsigc++-2.0
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	# Note: html docs are installed into /usr/share/doc/libsigc++-3.0
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	# We can't use /usr/share/doc/${PF} because of links from glibmm etc. docs
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	:;
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}
Спасибо!