dev-libs/libr: add dependencies and make them optional

Signed-off-by: Alexander Golubev <fatzer2@gmail.com>

dev-libs/libr/libr-14.1.0.ebuild

@@ -1,5 +1,5 @@
-# Copyright 1999-2023 Gentoo Authors
-# Copyright 2020-2023 The Trinity Desktop Project
+# Copyright 1999-2024 Gentoo Authors
+# Copyright 2020-2024 The Trinity Desktop Project
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="8"
@@ -16,17 +16,43 @@ SLOT="0"
 if [[ ${PV} != *9999* ]] ; then
 	KEYWORDS="~amd64 ~arm64 ~x86"
 fi
+IUSE="+bfd elf man"
+REQUIRED_USE="?? ( bfd elf )"
 
-DEPEND="sys-libs/binutils-libs:="
+RDEPEND="
+	sys-libs/zlib:=
+	bfd? ( sys-libs/binutils-libs:= )
+	elf? ( virtual/libelf:= )
+"
 DEPEND="${RDEPEND}
-	app-text/doxygen
+	x11-libs/gtk+:2
 "
+# NOTE: gtk uses weak linkage, so it's not necessary during runtime
+BDEPEND="man? ( app-text/doxygen )"
+
+pkg_setup() {
+	if ! use bfd && ! use elf; then
+		ewarn "You haven't selected nor \"bfd\" nor \"elf\" as a backend"
+		ewarn "a fallback read-only implementation will be used to"
+		ewarn "access elf resources, but modification of elf files will"
+		ewarn "be unavailable."
+	fi
+}
+
+src_prepare() {
+	trinity-base-2_src_prepare
+
+	if ! use man; then
+		rm -rf man || die
+	fi
+}
 
 src_configure() {
 	local mycmakeargs=(
-		-DWITH_BACKEND_LIBBFD=ON
-		-DWITH_BACKEND_LIBELF=OFF
-		-DWITH_BACKEND_READONLY=OFF
+		-DWITH_BACKEND_LIBBFD=$(usex bfd)
+		-DWITH_BACKEND_LIBELF=$(usex elf)
+		-DWITH_BACKEND_READONLY=$( (! use bfd && ! use elf) && echo yes || echo no )
 	)
+
 	cmake_src_configure
 }

dev-libs/libr/libr-14.1.1.ebuild

@@ -1,5 +1,5 @@
-# Copyright 1999-2023 Gentoo Authors
-# Copyright 2020-2023 The Trinity Desktop Project
+# Copyright 1999-2024 Gentoo Authors
+# Copyright 2020-2024 The Trinity Desktop Project
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="8"
@@ -16,17 +16,43 @@ SLOT="0"
 if [[ ${PV} != *9999* ]] ; then
 	KEYWORDS="~amd64 ~arm64 ~x86"
 fi
+IUSE="+bfd elf man"
+REQUIRED_USE="?? ( bfd elf )"
 
-DEPEND="sys-libs/binutils-libs:="
+RDEPEND="
+	sys-libs/zlib:=
+	bfd? ( sys-libs/binutils-libs:= )
+	elf? ( virtual/libelf:= )
+"
 DEPEND="${RDEPEND}
-	app-text/doxygen
+	x11-libs/gtk+:2
 "
+# NOTE: gtk uses weak linkage, so it's not necessary during runtime
+BDEPEND="man? ( app-text/doxygen )"
+
+pkg_setup() {
+	if ! use bfd && ! use elf; then
+		ewarn "You haven't selected nor \"bfd\" nor \"elf\" as a backend"
+		ewarn "a fallback read-only implementation will be used to"
+		ewarn "access elf resources, but modification of elf files will"
+		ewarn "be unavailable."
+	fi
+}
+
+src_prepare() {
+	trinity-base-2_src_prepare
+
+	if ! use man; then
+		rm -rf man || die
+	fi
+}
 
 src_configure() {
 	local mycmakeargs=(
-		-DWITH_BACKEND_LIBBFD=ON
-		-DWITH_BACKEND_LIBELF=OFF
-		-DWITH_BACKEND_READONLY=OFF
+		-DWITH_BACKEND_LIBBFD=$(usex bfd)
+		-DWITH_BACKEND_LIBELF=$(usex elf)
+		-DWITH_BACKEND_READONLY=$( (! use bfd && ! use elf) && echo yes || echo no )
 	)
+
 	cmake_src_configure
 }

dev-libs/libr/libr-9999.ebuild

@@ -1,5 +1,5 @@
-# Copyright 1999-2020 Gentoo Authors
-# Copyright 2020 The Trinity Desktop Project
+# Copyright 1999-2024 Gentoo Authors
+# Copyright 2020-2024 The Trinity Desktop Project
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="8"
@@ -16,17 +16,44 @@ SLOT="0"
 if [[ ${PV} != *9999* ]] ; then
 	KEYWORDS="~amd64 ~arm64 ~x86"
 fi
+IUSE="+bfd elf gtk man"
+REQUIRED_USE="?? ( bfd elf )"
 
-DEPEND="sys-libs/binutils-libs:="
+RDEPEND="
+	sys-libs/zlib:=
+	bfd? ( sys-libs/binutils-libs:= )
+	elf? ( virtual/libelf:= )
+"
 DEPEND="${RDEPEND}
-	app-text/doxygen
+	gtk? ( x11-libs/gtk+:2 )
 "
+# NOTE: gtk uses weak linkage, so it's not necessary during runtime
+BDEPEND="man? ( app-text/doxygen )"
+
+pkg_setup() {
+	if ! use bfd && ! use elf; then
+		ewarn "You haven't selected nor \"bfd\" nor \"elf\" as a backend"
+		ewarn "a fallback read-only implementation will be used to"
+		ewarn "access elf resources, but modification of elf files will"
+		ewarn "be unavailable."
+	fi
+}
+
+src_prepare() {
+	trinity-base-2_src_prepare
+
+	if ! use man; then
+		rm -rf man || die
+	fi
+}
 
 src_configure() {
 	local mycmakeargs=(
-		-DWITH_BACKEND_LIBBFD=ON
-		-DWITH_BACKEND_LIBELF=OFF
-		-DWITH_BACKEND_READONLY=OFF
+		-DWITH_BACKEND_LIBBFD=$(usex bfd)
+		-DWITH_BACKEND_LIBELF=$(usex elf)
+		-DWITH_BACKEND_READONLY=$( (! use bfd && ! use elf) && echo yes || echo no )
+		-DWITH_GTK=$(usex gtk)
 	)
+
 	cmake_src_configure
 }

dev-libs/libr/metadata.xml

@@ -5,4 +5,8 @@
     <email>team-gentoo@trinitydesktop.org</email>
     <name>Trinity Gentoo ebuilds project</name>
   </maintainer>
+  <use>
+    <flag name="bfd">Use libbfd from <pkg>sys-libs/binutils-libs</pkg> as a backend</flag>
+    <flag name="elf">Use libelf as a backend</flag>
+  </use>
 </pkgmetadata>