media-libs/mesa: Version bump to 18.0.0_rc4

2 files changed, 583 insertions, 0 deletions

diff --git a/media-libs/mesa/Manifest b/media-libs/mesa/Manifest
index a2275f96feb6..45ec23d7c04f 100644
--- a/media-libs/mesa/Manifest
+++ b/media-libs/mesa/Manifest
@@ -3,3 +3,4 @@ DIST mesa-17.2.8.tar.xz 10393304 BLAKE2B 558321eefc6d599aaedfe468f03c2f1f99b5c96
 DIST mesa-17.3.3.tar.xz 10637708 BLAKE2B a2cec4abc58eb71c1ec92d073ac3a128e1f993f69b163c9f6e474fef4520fe074d84ca8d972a7822a76226e132230f6e7fac320b940ea3462553d398ef6bcfce SHA512 7ac8ecdcf3b2b43239835bc2c5da7f2730f80a2db945fe00df03d1548920fbc074dd4806ddd345a1ce682fd29d75b2209ef81b6b06e657f9c8ae8622a34a03c1
 DIST mesa-18.0.0-rc2.tar.xz 10962300 BLAKE2B 89444a46261d837bd5c7bc54898ebdafe58e863d3532bd80f6592432d2925317fc0ac144dd55862a249d6390efc3955942dc2980ce87e589b9360de61a1f6148 SHA512 aada4caf4c2021bc1e7c071b32ed0ccbbbfe415bc1cb5a80eee3911b1b11a2bd87a10e99c5a152790709488afbdb60e87b4b66c2ca22c0cf89c029fb10c6e8b3
 DIST mesa-18.0.0-rc3.tar.xz 10964880 BLAKE2B 4887e2962b3d1c328734af9effe33cac7fd69c888b3c500d28423c62bae0a26fe58396c8371b1e0861e68a90c03be0029d5a32019efa920f40908b0b054d7c6c SHA512 62e7491cdd5a6651c2bb7c0268685654d5376a68135c1904c684f716805695840c0a16fcff324c75f3ec000bebfa835b3da9a13c479b612da715b171fe68bc0b
+DIST mesa-18.0.0-rc4.tar.xz 11027596 BLAKE2B 96554acd69636b91d1b79e7fefa4ba6e3f701ef7ef6c16718493070d62ab41c7bbd66e2f4d4a97fac8c236ac4c9150b2ce41e4e57b865fff6122b3f60b047e25 SHA512 91dd0a4396715a7896fc47aabf38c4b486df3b50c9764795805550ef01724d2e2281ba9b000e82760ea0e199c58d8c9943dbc732b2adab46554ff5c2f9e2ece1
diff --git a/media-libs/mesa/mesa-18.0.0_rc4.ebuild b/media-libs/mesa/mesa-18.0.0_rc4.ebuild
new file mode 100644
index 000000000000..e2f425d49acd
--- /dev/null
+++ b/media-libs/mesa/mesa-18.0.0_rc4.ebuild
@@ -0,0 +1,582 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+EGIT_REPO_URI="https://anongit.freedesktop.org/git/mesa/mesa.git"
+
+if [[ ${PV} = 9999 ]]; then
+	GIT_ECLASS="git-r3"
+	EXPERIMENTAL="true"
+fi
+
+PYTHON_COMPAT=( python2_7 )
+
+inherit autotools llvm multilib-minimal python-any-r1 pax-utils ${GIT_ECLASS}
+
+OPENGL_DIR="xorg-x11"
+
+MY_P="${P/_/-}"
+
+DESCRIPTION="OpenGL-like graphic library for Linux"
+HOMEPAGE="https://www.mesa3d.org/ https://mesa.freedesktop.org/"
+
+if [[ $PV == 9999 ]]; then
+	SRC_URI=""
+else
+	SRC_URI="https://mesa.freedesktop.org/archive/${MY_P}.tar.xz"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~arm-linux ~x86-linux ~sparc-solaris ~x64-solaris ~x86-solaris"
+fi
+
+LICENSE="MIT"
+SLOT="0"
+RESTRICT="!bindist? ( bindist )"
+
+RADEON_CARDS="r100 r200 r300 r600 radeon radeonsi"
+VIDEO_CARDS="${RADEON_CARDS} freedreno i915 i965 imx intel nouveau vc4 virgl vivante vmware"
+for card in ${VIDEO_CARDS}; do
+	IUSE_VIDEO_CARDS+=" video_cards_${card}"
+done
+
+IUSE="${IUSE_VIDEO_CARDS}
+	bindist +classic d3d9 debug +dri3 +egl +gallium +gbm gles1 gles2 unwind
+	+llvm +nptl opencl osmesa pax_kernel openmax pic selinux vaapi valgrind
+	vdpau vulkan wayland xvmc xa"
+
+REQUIRED_USE="
+	d3d9?   ( dri3 gallium )
+	llvm?   ( gallium )
+	opencl? ( gallium llvm )
+	openmax? ( gallium )
+	gles1?  ( egl )
+	gles2?  ( egl )
+	vaapi? ( gallium )
+	vdpau? ( gallium )
+	vulkan? ( || ( video_cards_i965 video_cards_radeonsi )
+			  video_cards_radeonsi? ( llvm ) )
+	wayland? ( egl gbm )
+	xa?  ( gallium )
+	video_cards_freedreno?  ( gallium )
+	video_cards_intel?  ( classic )
+	video_cards_i915?   ( || ( classic gallium ) )
+	video_cards_i965?   ( classic )
+	video_cards_imx?    ( gallium video_cards_vivante )
+	video_cards_nouveau? ( || ( classic gallium ) )
+	video_cards_radeon? ( || ( classic gallium )
+						  gallium? ( x86? ( llvm ) amd64? ( llvm ) ) )
+	video_cards_r100?   ( classic )
+	video_cards_r200?   ( classic )
+	video_cards_r300?   ( gallium x86? ( llvm ) amd64? ( llvm ) )
+	video_cards_r600?   ( gallium )
+	video_cards_radeonsi?   ( gallium llvm )
+	video_cards_vc4? ( gallium )
+	video_cards_virgl? ( gallium )
+	video_cards_vivante? ( gallium gbm )
+	video_cards_vmware? ( gallium )
+"
+
+LIBDRM_DEPSTRING=">=x11-libs/libdrm-2.4.89"
+# keep correct libdrm and dri2proto dep
+# keep blocks in rdepend for binpkg
+RDEPEND="
+	!<x11-base/xorg-server-1.7
+	!<=x11-proto/xf86driproto-2.0.3
+	abi_x86_32? ( !app-emulation/emul-linux-x86-opengl[-abi_x86_32(-)] )
+	classic? ( app-eselect/eselect-mesa )
+	gallium? ( app-eselect/eselect-mesa )
+	>=app-eselect/eselect-opengl-1.3.0
+	>=dev-libs/expat-2.1.0-r3:=[${MULTILIB_USEDEP}]
+	>=sys-libs/zlib-1.2.8[${MULTILIB_USEDEP}]
+	>=x11-libs/libX11-1.6.2:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libxshmfence-1.1:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libXdamage-1.1.4-r1:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libXext-1.3.2:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libXxf86vm-1.1.3:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libxcb-1.9.3:=[${MULTILIB_USEDEP}]
+	x11-libs/libXfixes:=[${MULTILIB_USEDEP}]
+	unwind? ( sys-libs/libunwind[${MULTILIB_USEDEP}] )
+	llvm? (
+		video_cards_radeonsi? (
+			virtual/libelf:0=[${MULTILIB_USEDEP}]
+		)
+		video_cards_r600? (
+			virtual/libelf:0=[${MULTILIB_USEDEP}]
+		)
+		video_cards_radeon? (
+			virtual/libelf:0=[${MULTILIB_USEDEP}]
+		)
+	)
+	opencl? (
+				app-eselect/eselect-opencl
+				dev-libs/libclc
+				virtual/libelf:0=[${MULTILIB_USEDEP}]
+			)
+	openmax? ( >=media-libs/libomxil-bellagio-0.9.3:=[${MULTILIB_USEDEP}] )
+	vaapi? (
+		>=x11-libs/libva-1.7.3:=[${MULTILIB_USEDEP}]
+		video_cards_nouveau? ( !<=x11-libs/libva-vdpau-driver-0.7.4-r3 )
+	)
+	vdpau? ( >=x11-libs/libvdpau-1.1:=[${MULTILIB_USEDEP}] )
+	wayland? (
+		>=dev-libs/wayland-1.11.0:=[${MULTILIB_USEDEP}]
+		>=dev-libs/wayland-protocols-1.8
+	)
+	xvmc? ( >=x11-libs/libXvMC-1.0.8:=[${MULTILIB_USEDEP}] )
+	${LIBDRM_DEPSTRING}[video_cards_freedreno?,video_cards_nouveau?,video_cards_vc4?,video_cards_vivante?,video_cards_vmware?,${MULTILIB_USEDEP}]
+
+	video_cards_intel? (
+		!video_cards_i965? ( ${LIBDRM_DEPSTRING}[video_cards_intel] )
+	)
+	video_cards_i915? ( ${LIBDRM_DEPSTRING}[video_cards_intel] )
+"
+for card in ${RADEON_CARDS}; do
+	RDEPEND="${RDEPEND}
+		video_cards_${card}? ( ${LIBDRM_DEPSTRING}[video_cards_radeon] )
+	"
+done
+RDEPEND="${RDEPEND}
+	video_cards_radeonsi? ( ${LIBDRM_DEPSTRING}[video_cards_amdgpu] )
+"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling one than more slot
+# simultaneously.
+#
+# How to use it:
+# 1. List all the working slots (with min versions) in ||, newest first.
+# 2. Update the := to specify *max* version, e.g. < 7.
+# 3. Specify LLVM_MAX_SLOT, e.g. 6.
+LLVM_DEPSTR="
+	|| (
+		sys-devel/llvm:7[${MULTILIB_USEDEP}]
+		sys-devel/llvm:6[${MULTILIB_USEDEP}]
+		sys-devel/llvm:5[${MULTILIB_USEDEP}]
+		sys-devel/llvm:4[${MULTILIB_USEDEP}]
+		>=sys-devel/llvm-3.9.0:0[${MULTILIB_USEDEP}]
+	)
+	sys-devel/llvm:=[${MULTILIB_USEDEP}]
+"
+LLVM_DEPSTR_AMDGPU=${LLVM_DEPSTR//]/,llvm_targets_AMDGPU(-)]}
+CLANG_DEPSTR=${LLVM_DEPSTR//llvm/clang}
+CLANG_DEPSTR_AMDGPU=${CLANG_DEPSTR//]/,llvm_targets_AMDGPU(-)]}
+RDEPEND="${RDEPEND}
+	llvm? (
+		opencl? (
+			video_cards_r600? (
+				${CLANG_DEPSTR_AMDGPU}
+			)
+			!video_cards_r600? (
+				video_cards_radeonsi? (
+					${CLANG_DEPSTR_AMDGPU}
+				)
+			)
+			!video_cards_r600? (
+				!video_cards_radeonsi? (
+					video_cards_radeon? (
+						${CLANG_DEPSTR_AMDGPU}
+					)
+				)
+			)
+			!video_cards_r600? (
+				!video_cards_radeon? (
+					!video_cards_radeonsi? (
+						${CLANG_DEPSTR}
+					)
+				)
+			)
+		)
+		!opencl? (
+			video_cards_r600? (
+				${LLVM_DEPSTR_AMDGPU}
+			)
+			!video_cards_r600? (
+				video_cards_radeonsi? (
+					${LLVM_DEPSTR_AMDGPU}
+				)
+			)
+			!video_cards_r600? (
+				!video_cards_radeonsi? (
+					video_cards_radeon? (
+						${LLVM_DEPSTR_AMDGPU}
+					)
+				)
+			)
+			!video_cards_r600? (
+				!video_cards_radeon? (
+					!video_cards_radeonsi? (
+						${LLVM_DEPSTR}
+					)
+				)
+			)
+		)
+	)
+"
+unset {LLVM,CLANG}_DEPSTR{,_AMDGPU}
+
+DEPEND="${RDEPEND}
+	${PYTHON_DEPS}
+	opencl? (
+		>=sys-devel/gcc-4.6
+	)
+	sys-devel/gettext
+	virtual/pkgconfig
+	valgrind? ( dev-util/valgrind )
+	>=x11-proto/dri2proto-2.8-r1:=[${MULTILIB_USEDEP}]
+	dri3? (
+		>=x11-proto/dri3proto-1.0:=[${MULTILIB_USEDEP}]
+		>=x11-proto/presentproto-1.0:=[${MULTILIB_USEDEP}]
+	)
+	>=x11-proto/glproto-1.4.17-r1:=[${MULTILIB_USEDEP}]
+	>=x11-proto/xextproto-7.2.1-r1:=[${MULTILIB_USEDEP}]
+	>=x11-proto/xf86driproto-2.1.1-r1:=[${MULTILIB_USEDEP}]
+	>=x11-proto/xf86vidmodeproto-2.3.1-r1:=[${MULTILIB_USEDEP}]
+	vulkan? (
+		$(python_gen_any_dep ">=dev-python/mako-0.7.3[\${PYTHON_USEDEP}]")
+	)
+"
+[[ ${PV} == 9999 ]] && DEPEND+="
+	sys-devel/bison
+	sys-devel/flex
+	$(python_gen_any_dep ">=dev-python/mako-0.7.3[\${PYTHON_USEDEP}]")
+"
+
+S="${WORKDIR}/${MY_P}"
+EGIT_CHECKOUT_DIR=${S}
+
+QA_WX_LOAD="
+x86? (
+	!pic? (
+		usr/lib*/libglapi.so.0.0.0
+		usr/lib*/libGLESv1_CM.so.1.1.0
+		usr/lib*/libGLESv2.so.2.0.0
+		usr/lib*/libGL.so.1.2.0
+		usr/lib*/libOSMesa.so.8.0.0
+	)
+)"
+
+llvm_check_deps() {
+	local flags=${MULTILIB_USEDEP}
+	if use video_cards_r600 || use video_cards_radeon || use video_cards_radeonsi
+	then
+		flags+=",llvm_targets_AMDGPU(-)"
+	fi
+
+	if use opencl; then
+		has_version "sys-devel/clang[${flags}]" || return 1
+	fi
+	has_version "sys-devel/llvm[${flags}]"
+}
+
+pkg_setup() {
+	# warning message for bug 459306
+	if use llvm && has_version sys-devel/llvm[!debug=]; then
+		ewarn "Mismatch between debug USE flags in media-libs/mesa and sys-devel/llvm"
+		ewarn "detected! This can cause problems. For details, see bug 459306."
+	fi
+
+	if use llvm; then
+		llvm_pkg_setup
+	fi
+	python-any-r1_pkg_setup
+}
+
+src_prepare() {
+	[[ ${PV} == 9999 ]] && eautoreconf
+	eapply_user
+}
+
+multilib_src_configure() {
+	local myconf
+
+	if use classic; then
+		# Configurable DRI drivers
+		driver_enable swrast
+
+		# Intel code
+		driver_enable video_cards_i915 i915
+		driver_enable video_cards_i965 i965
+		if ! use video_cards_i915 && \
+			! use video_cards_i965; then
+			driver_enable video_cards_intel i915 i965
+		fi
+
+		# Nouveau code
+		driver_enable video_cards_nouveau nouveau
+
+		# ATI code
+		driver_enable video_cards_r100 radeon
+		driver_enable video_cards_r200 r200
+		if ! use video_cards_r100 && \
+				! use video_cards_r200; then
+			driver_enable video_cards_radeon radeon r200
+		fi
+	fi
+
+	if use egl; then
+		myconf+=" --with-platforms=x11,surfaceless$(use wayland && echo ",wayland")$(use gbm && echo ",drm")"
+	fi
+
+	if use gallium; then
+		myconf+="
+			$(use_enable d3d9 nine)
+			$(use_enable llvm)
+			$(use_enable openmax omx-bellagio)
+			$(use_enable vaapi va)
+			$(use_enable vdpau)
+			$(use_enable xa)
+			$(use_enable xvmc)
+		"
+		use vaapi && myconf+=" --with-va-libdir=/usr/$(get_libdir)/va/drivers"
+
+		gallium_enable swrast
+		gallium_enable video_cards_vc4 vc4
+		gallium_enable video_cards_vivante etnaviv
+		gallium_enable video_cards_vmware svga
+		gallium_enable video_cards_nouveau nouveau
+		gallium_enable video_cards_i915 i915
+		gallium_enable video_cards_imx imx
+		if ! use video_cards_i915 && \
+			! use video_cards_i965; then
+			gallium_enable video_cards_intel i915
+		fi
+
+		gallium_enable video_cards_r300 r300
+		gallium_enable video_cards_r600 r600
+		gallium_enable video_cards_radeonsi radeonsi
+		if ! use video_cards_r300 && \
+				! use video_cards_r600; then
+			gallium_enable video_cards_radeon r300 r600
+		fi
+
+		gallium_enable video_cards_freedreno freedreno
+		# opencl stuff
+		if use opencl; then
+			myconf+="
+				$(use_enable opencl)
+				--with-clang-libdir="${EPREFIX}/usr/lib"
+				"
+		fi
+
+		gallium_enable video_cards_virgl virgl
+	fi
+
+	if use vulkan; then
+		vulkan_enable video_cards_i965 intel
+		vulkan_enable video_cards_radeonsi radeon
+	fi
+
+	# x86 hardened pax_kernel needs glx-rts, bug 240956
+	if [[ ${ABI} == x86 ]]; then
+		myconf+=" $(use_enable pax_kernel glx-read-only-text)"
+	fi
+
+	# on abi_x86_32 hardened we need to have asm disable
+	if [[ ${ABI} == x86* ]] && use pic; then
+		myconf+=" --disable-asm"
+	fi
+
+	if use gallium; then
+		myconf+=" $(use_enable osmesa gallium-osmesa)"
+	else
+		myconf+=" $(use_enable osmesa)"
+	fi
+
+	# build fails with BSD indent, bug #428112
+	use userland_GNU || export INDENT=cat
+
+	ECONF_SOURCE="${S}" \
+	econf \
+		--enable-dri \
+		--enable-glx \
+		--enable-shared-glapi \
+		$(use_enable !bindist texture-float) \
+		$(use_enable d3d9 nine) \
+		$(use_enable debug) \
+		$(use_enable dri3) \
+		$(use_enable egl) \
+		$(use_enable gbm) \
+		$(use_enable gles1) \
+		$(use_enable gles2) \
+		$(use_enable nptl glx-tls) \
+		$(use_enable unwind libunwind) \
+		--enable-valgrind=$(usex valgrind auto no) \
+		--enable-llvm-shared-libs \
+		--disable-opencl-icd \
+		--with-dri-drivers=${DRI_DRIVERS} \
+		--with-gallium-drivers=${GALLIUM_DRIVERS} \
+		--with-vulkan-drivers=${VULKAN_DRIVERS} \
+		PYTHON2="${PYTHON}" \
+		${myconf}
+}
+
+multilib_src_install() {
+	emake install DESTDIR="${D}"
+
+	if use classic || use gallium; then
+			ebegin "Moving DRI/Gallium drivers for dynamic switching"
+			local gallium_drivers=( i915_dri.so i965_dri.so r300_dri.so r600_dri.so swrast_dri.so )
+			keepdir /usr/$(get_libdir)/dri
+			dodir /usr/$(get_libdir)/mesa
+			for x in ${gallium_drivers[@]}; do
+				if [ -f "$(get_libdir)/gallium/${x}" ]; then
+					mv -f "${ED}/usr/$(get_libdir)/dri/${x}" "${ED}/usr/$(get_libdir)/dri/${x/_dri.so/g_dri.so}" \
+						|| die "Failed to move ${x}"
+				fi
+			done
+			if use classic; then
+				emake -C "${BUILD_DIR}/src/mesa/drivers/dri" DESTDIR="${D}" install
+			fi
+			for x in "${ED}"/usr/$(get_libdir)/dri/*.so; do
+				if [ -f ${x} -o -L ${x} ]; then
+					mv -f "${x}" "${x/dri/mesa}" \
+						|| die "Failed to move ${x}"
+				fi
+			done
+			pushd "${ED}"/usr/$(get_libdir)/dri || die "pushd failed"
+			ln -s ../mesa/*.so . || die "Creating symlink failed"
+			# remove symlinks to drivers known to eselect
+			for x in ${gallium_drivers[@]}; do
+				if [ -f ${x} -o -L ${x} ]; then
+					rm "${x}" || die "Failed to remove ${x}"
+				fi
+			done
+			popd
+		eend $?
+	fi
+	if use opencl; then
+		ebegin "Moving Gallium/Clover OpenCL implementation for dynamic switching"
+		local cl_dir="/usr/$(get_libdir)/OpenCL/vendors/mesa"
+		dodir ${cl_dir}/{lib,include}
+		if [ -f "${ED}/usr/$(get_libdir)/libOpenCL.so" ]; then
+			mv -f "${ED}"/usr/$(get_libdir)/libOpenCL.so* \
+			"${ED}"${cl_dir}
+		fi
+		if [ -f "${ED}/usr/include/CL/opencl.h" ]; then
+			mv -f "${ED}"/usr/include/CL \
+			"${ED}"${cl_dir}/include
+		fi
+		eend $?
+	fi
+
+	if use openmax; then
+		echo "XDG_DATA_DIRS=\"${EPREFIX}/usr/share/mesa/xdg\"" > "${T}/99mesaxdgomx"
+		doenvd "${T}"/99mesaxdgomx
+		keepdir /usr/share/mesa/xdg
+	fi
+}
+
+multilib_src_install_all() {
+	find "${ED}" -name '*.la' -delete
+	einstalldocs
+
+	if use !bindist; then
+		dodoc docs/patents.txt
+	fi
+
+	# Install config file for eselect mesa
+	insinto /usr/share/mesa
+	newins "${FILESDIR}/eselect-mesa.conf.9.2" eselect-mesa.conf
+}
+
+multilib_src_test() {
+	if use llvm; then
+		local llvm_tests='lp_test_arit lp_test_arit lp_test_blend lp_test_blend lp_test_conv lp_test_conv lp_test_format lp_test_format lp_test_printf lp_test_printf'
+		pushd src/gallium/drivers/llvmpipe >/dev/null || die
+		emake ${llvm_tests}
+		pax-mark m ${llvm_tests}
+		popd >/dev/null || die
+	fi
+	emake check
+}
+
+pkg_postinst() {
+	# Switch to the xorg implementation.
+	echo
+	eselect opengl set --use-old ${OPENGL_DIR}
+
+	# Select classic/gallium drivers
+	if use classic || use gallium; then
+		eselect mesa set --auto
+	fi
+
+	# Switch to mesa opencl
+	if use opencl; then
+		eselect opencl set --use-old ${PN}
+	fi
+
+	# run omxregister-bellagio to make the OpenMAX drivers known system-wide
+	if use openmax; then
+		ebegin "Registering OpenMAX drivers"
+		BELLAGIO_SEARCH_PATH="${EPREFIX}/usr/$(get_libdir)/libomxil-bellagio0" \
+			OMX_BELLAGIO_REGISTRY=${EPREFIX}/usr/share/mesa/xdg/.omxregister \
+			omxregister-bellagio
+		eend $?
+	fi
+
+	# warn about patent encumbered texture-float
+	if use !bindist; then
+		elog "USE=\"bindist\" was not set. Potentially patent encumbered code was"
+		elog "enabled. Please see /usr/share/doc/${P}/patents.txt.bz2 for an"
+		elog "explanation."
+	fi
+}
+
+pkg_prerm() {
+	if use openmax; then
+		rm "${EPREFIX}"/usr/share/mesa/xdg/.omxregister
+	fi
+}
+
+# $1 - VIDEO_CARDS flag
+# other args - names of DRI drivers to enable
+# TODO: avoid code duplication for a more elegant implementation
+driver_enable() {
+	case $# in
+		# for enabling unconditionally
+		1)
+			DRI_DRIVERS+=",$1"
+			;;
+		*)
+			if use $1; then
+				shift
+				for i in $@; do
+					DRI_DRIVERS+=",${i}"
+				done
+			fi
+			;;
+	esac
+}
+
+gallium_enable() {
+	case $# in
+		# for enabling unconditionally
+		1)
+			GALLIUM_DRIVERS+=",$1"
+			;;
+		*)
+			if use $1; then
+				shift
+				for i in $@; do
+					GALLIUM_DRIVERS+=",${i}"
+				done
+			fi
+			;;
+	esac
+}
+
+vulkan_enable() {
+	case $# in
+		# for enabling unconditionally
+		1)
+			VULKAN_DRIVERS+=",$1"
+			;;
+		*)
+			if use $1; then
+				shift
+				for i in $@; do
+					VULKAN_DRIVERS+=",${i}"
+				done
+			fi
+			;;
+	esac
+}