add mesa 10.5.0-rc1

2 files changed, 494 insertions, 0 deletions

diff --git a/media-libs/mesa/Manifest b/media-libs/mesa/Manifest
index 835fb85..7fe8eb5 100644
--- a/media-libs/mesa/Manifest
+++ b/media-libs/mesa/Manifest
@@ -2,6 +2,8 @@ AUX eselect-mesa.conf.9.2 1676 SHA256 bcf5f77140b4695f147d4cd3c2db4b954fb57eccfd
 DIST MesaLib-10.4.2.tar.bz2 7480751 SHA256 08a119937d9f2aa2f66dd5de97baffc2a6e675f549e40e699a31f5485d15327f SHA512 dcf479c28de8d13e6e3348c18b020944c085a476a419110d4da36df93bd1961c2b04989abbc737820f9408bbc007c64a69d2348871c661be80a6a06a8b7a0a04 WHIRLPOOL ef34048c53a032b37808737a7014f384f7df378a1ae2f7333107d2197d3ca73d3c66c41ac3c7812c34073221420a7f3667bf3da4bca68158716b506f3cdac262
 DIST MesaLib-10.4.3.tar.bz2 7504749 SHA256 ef6ecc9c2f36c9f78d1662382a69ae961f38f03af3a0c3268e53f351aa1978ad SHA512 b59ce48fb663d3ea1c5400fd43cc90983d244068bc45fd809cb175ab64e416473a45d81ccb9274661d8a9a2d7753c4f57726bfe294aea801cb266fd76a732901 WHIRLPOOL 7ef298f400c5caa6757c8ec9a2764236896dc4d517564e2d6411423a43381843cf3cc7dedd1eb1dd884d9f1cd7111458c1f188ff959fc530df2cdb459ed10faf
 DIST MesaLib-10.4.4.tar.bz2 7507100 SHA256 f18a967e9c4d80e054b2fdff8c130ce6e6d1f8eecfc42c9f354f8628d8b4df1c SHA512 72d289d051bcb676ea93714c73f43e3decddaf1877e39bc7b9f092946b79d4e9c40dd534187a9eae81c844f8f9843bc6d0a804e5f22fae0cafc2b482859c7357 WHIRLPOOL ec89fcf5ac70170d8253a7b5d41dd0f46dc666e1b39d6b981d1a0169fbe360efa26c6f550c5391122baf1745f70786bc8a6a6b5d070404a455374aa358800e04
+DIST mesa-10.5.0-rc1.tar.xz 6914148 SHA256 4047cdc87488e7a94ab97a507baa4b91f8f84418445aab47e5b29fe3cc49c4bd SHA512 71fd2eb3495aea0194f8276391d4279542f94df246f2876ad64d652e4c998e603ebd372d71ccedfc5bb5125f773a11921c9f59d8369b320bcae96be18e923667 WHIRLPOOL 739b8e261fe222bddb2b1c627e989451c1f79318e07297a85b464f5126e041a6fb2174eecc3f1126b8d245719b04c57f79dde608f1584e564fc675a5830fe51b
 EBUILD mesa-10.4.2.ebuild 13535 SHA256 a7d833949eb5c74eebd5174c280b77c0d43a45c4f258cac8ccb8ca1d8952a9f3 SHA512 7309c6cf5450611528c1cf714cfe2d13ffb6b4fae0ea7337e44c55221392e4208f9b3e30dc00d00966def132f0e5ee3ced2fe7f95e983aafc2413e3c2f9da31e WHIRLPOOL b9f6a667d7c110ee4aae0f20a8f3caa6059989457d6c24c0af92888c3b6cb90000c0a2bc809ff429b03e5f7f384e463506751604388ca3168dcfe16c838e5e73
 EBUILD mesa-10.4.3.ebuild 13535 SHA256 a7d833949eb5c74eebd5174c280b77c0d43a45c4f258cac8ccb8ca1d8952a9f3 SHA512 7309c6cf5450611528c1cf714cfe2d13ffb6b4fae0ea7337e44c55221392e4208f9b3e30dc00d00966def132f0e5ee3ced2fe7f95e983aafc2413e3c2f9da31e WHIRLPOOL b9f6a667d7c110ee4aae0f20a8f3caa6059989457d6c24c0af92888c3b6cb90000c0a2bc809ff429b03e5f7f384e463506751604388ca3168dcfe16c838e5e73
 EBUILD mesa-10.4.4.ebuild 13535 SHA256 a7d833949eb5c74eebd5174c280b77c0d43a45c4f258cac8ccb8ca1d8952a9f3 SHA512 7309c6cf5450611528c1cf714cfe2d13ffb6b4fae0ea7337e44c55221392e4208f9b3e30dc00d00966def132f0e5ee3ced2fe7f95e983aafc2413e3c2f9da31e WHIRLPOOL b9f6a667d7c110ee4aae0f20a8f3caa6059989457d6c24c0af92888c3b6cb90000c0a2bc809ff429b03e5f7f384e463506751604388ca3168dcfe16c838e5e73
+EBUILD mesa-10.5.0_rc1.ebuild 13508 SHA256 7a5111f43529239f89cbea2e0987bbacddb2d4746efdf9b3522a11055b704ec7 SHA512 ec95af2a3ffed967bcfa19731167ee0ac3bf4871e51f534965ef14b69c1d6211671f10c3095e9e7163865893f236f0e7ef00b6fdd5541632b03a682a809c4f1d WHIRLPOOL ad8bcc250c9882617d69650962084746a2a3a703a9d0425c91a63ab0ebf623a33bc0fae5cafbd2b3c59e2ed4c22551c56b9003b541f33459c8b7c5cbfa997592
diff --git a/media-libs/mesa/mesa-10.5.0_rc1.ebuild b/media-libs/mesa/mesa-10.5.0_rc1.ebuild
new file mode 100644
index 0000000..679185b
--- /dev/null
+++ b/media-libs/mesa/mesa-10.5.0_rc1.ebuild
@@ -0,0 +1,492 @@
+# Copyright 1999-2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/media-libs/mesa/mesa-10.3.5-r1.ebuild,v 1.2 2014/12/08 18:50:55 mattst88 Exp $
+
+EAPI=5
+
+EGIT_REPO_URI="git://anongit.freedesktop.org/mesa/mesa"
+
+if [[ ${PV} = 9999* ]]; then
+	GIT_ECLASS="git-r3"
+	EXPERIMENTAL="true"
+fi
+
+PYTHON_COMPAT=( python{2_6,2_7} )
+
+inherit base autotools multilib multilib-minimal flag-o-matic \
+	python-any-r1 toolchain-funcs pax-utils ${GIT_ECLASS}
+
+OPENGL_DIR="xorg-x11"
+
+MY_P="${PN}-${PV/_/-}"
+MY_SRC_P="${PN}-${PV/_/-}"
+
+FOLDER="${PV%_rc*}"
+
+DESCRIPTION="OpenGL-like graphic library for Linux"
+HOMEPAGE="http://mesa3d.sourceforge.net/"
+
+#SRC_PATCHES="mirror://gentoo/${P}-gentoo-patches-01.tar.bz2"
+if [[ $PV = 9999* ]]; then
+	SRC_URI="${SRC_PATCHES}"
+else
+	SRC_URI="ftp://ftp.freedesktop.org/pub/mesa/${FOLDER}/${MY_SRC_P}.tar.xz
+		${SRC_PATCHES}"
+fi
+
+# The code is MIT/X11.
+# GLES[2]/gl[2]{,ext,platform}.h are SGI-B-2.0
+LICENSE="MIT SGI-B-2.0"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd ~x86-freebsd ~amd64-linux ~arm-linux ~ia64-linux ~x86-linux ~sparc-solaris ~x64-solaris ~x86-solaris"
+
+INTEL_CARDS="i915 i965 ilo intel"
+RADEON_CARDS="r100 r200 r300 r600 radeon radeonsi"
+VIDEO_CARDS="${INTEL_CARDS} ${RADEON_CARDS} freedreno nouveau vmware"
+for card in ${VIDEO_CARDS}; do
+	IUSE_VIDEO_CARDS+=" video_cards_${card}"
+done
+
+IUSE="${IUSE_VIDEO_CARDS}
+	bindist +classic debug +dri3 +egl +gallium +gbm gles1 gles2 +llvm +nptl
+	opencl openvg osmesa pax_kernel openmax pic r600-llvm-compiler selinux
+	+udev vdpau wayland xvmc xa kernel_FreeBSD kernel_linux"
+
+REQUIRED_USE="
+	llvm?   ( gallium )
+	openvg? ( egl gallium )
+	opencl? (
+		gallium
+		llvm
+		video_cards_r600? ( r600-llvm-compiler )
+		video_cards_radeon? ( r600-llvm-compiler )
+		video_cards_radeonsi? ( r600-llvm-compiler )
+	)
+	openmax? ( gallium )
+	gles1?  ( egl )
+	gles2?  ( egl )
+	r600-llvm-compiler? ( gallium llvm || ( video_cards_r600 video_cards_radeonsi video_cards_radeon ) )
+	wayland? ( egl gbm )
+	xa?  ( gallium )
+	video_cards_freedreno?  ( gallium )
+	video_cards_intel?  ( || ( classic gallium ) )
+	video_cards_i915?   ( || ( classic gallium ) )
+	video_cards_i965?   ( classic )
+	video_cards_ilo?    ( gallium )
+	video_cards_nouveau? ( || ( classic gallium ) )
+	video_cards_radeon? ( || ( classic gallium ) )
+	video_cards_r100?   ( classic )
+	video_cards_r200?   ( classic )
+	video_cards_r300?   ( gallium )
+	video_cards_r600?   ( gallium )
+	video_cards_radeonsi?   ( gallium llvm )
+	video_cards_vmware? ( gallium )
+	${PYTHON_REQUIRED_USE}
+"
+
+LIBDRM_DEPSTRING=">=x11-libs/libdrm-2.4.56"
+# keep correct libdrm and dri2proto dep
+# keep blocks in rdepend for binpkg
+RDEPEND="
+	!<x11-base/xorg-server-1.7
+	!<=x11-proto/xf86driproto-2.0.3
+	abi_x86_32? ( !app-emulation/emul-linux-x86-opengl[-abi_x86_32(-)] )
+	classic? ( app-admin/eselect-mesa )
+	gallium? ( app-admin/eselect-mesa )
+	>=app-admin/eselect-opengl-1.3.0
+	udev? ( kernel_linux? ( >=virtual/libudev-215:=[${MULTILIB_USEDEP}] ) )
+	>=dev-libs/expat-2.1.0-r3:=[${MULTILIB_USEDEP}]
+	>=x11-libs/libX11-1.6.2:=[${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:=[${MULTILIB_USEDEP}]
+	llvm? (
+		video_cards_radeonsi? ( || (
+			>=dev-libs/elfutils-0.155-r1:=[${MULTILIB_USEDEP}]
+			>=dev-libs/libelf-0.8.13-r2:=[${MULTILIB_USEDEP}]
+			) )
+		video_cards_r600? ( || (
+			>=dev-libs/elfutils-0.155-r1:=[${MULTILIB_USEDEP}]
+			>=dev-libs/libelf-0.8.13-r2:=[${MULTILIB_USEDEP}]
+			) )
+		!video_cards_r600? (
+			video_cards_radeon? ( || (
+				>=dev-libs/elfutils-0.155-r1:=[${MULTILIB_USEDEP}]
+				>=dev-libs/libelf-0.8.13-r2:=[${MULTILIB_USEDEP}]
+				) )
+		)
+		>=sys-devel/llvm-3.3-r3:=[${MULTILIB_USEDEP}]
+		video_cards_radeonsi? ( >=sys-devel/llvm-3.4.2:=[${MULTILIB_USEDEP}] )
+	)
+	opencl? (
+				app-admin/eselect-opencl
+				dev-libs/libclc
+			)
+	openmax? ( >=media-libs/libomxil-bellagio-0.9.3:=[${MULTILIB_USEDEP}] )
+	vdpau? ( >=x11-libs/libvdpau-0.7:=[${MULTILIB_USEDEP}] )
+	wayland? ( >=dev-libs/wayland-1.2.0:=[${MULTILIB_USEDEP}] )
+	xvmc? ( >=x11-libs/libXvMC-1.0.8:=[${MULTILIB_USEDEP}] )
+	${LIBDRM_DEPSTRING}[video_cards_freedreno?,video_cards_nouveau?,video_cards_vmware?,${MULTILIB_USEDEP}]
+"
+for card in ${INTEL_CARDS}; do
+	RDEPEND="${RDEPEND}
+		video_cards_${card}? ( ${LIBDRM_DEPSTRING}[video_cards_intel] )
+	"
+done
+
+for card in ${RADEON_CARDS}; do
+	RDEPEND="${RDEPEND}
+		video_cards_${card}? ( ${LIBDRM_DEPSTRING}[video_cards_radeon] )
+	"
+done
+
+DEPEND="${RDEPEND}
+	${PYTHON_DEPS}
+	llvm? (
+		r600-llvm-compiler? ( sys-devel/llvm[video_cards_radeon] )
+		video_cards_radeonsi? ( sys-devel/llvm[video_cards_radeon] )
+	)
+	opencl? (
+				>=sys-devel/llvm-3.4.2:=[${MULTILIB_USEDEP}]
+				>=sys-devel/clang-3.4.2:=[${MULTILIB_USEDEP}]
+				>=sys-devel/gcc-4.6
+	)
+	sys-devel/bison
+	sys-devel/flex
+	sys-devel/gettext
+	virtual/pkgconfig
+	>=x11-proto/dri2proto-2.8-r1:=[${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}]
+"
+
+S="${WORKDIR}/${MY_P}"
+EGIT_CHECKOUT_DIR=${S}
+
+# It is slow without texrels, if someone wants slow
+# mesa without texrels +pic use is worth the shot
+QA_EXECSTACK="usr/lib*/libGL.so*"
+QA_WX_LOAD="usr/lib*/libGL.so*"
+
+# Think about: ggi, fbcon, no-X configs
+
+pkg_setup() {
+	# workaround toc-issue wrt #386545
+	use ppc64 && append-flags -mminimal-toc
+
+	# 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
+
+	python-any-r1_pkg_setup
+}
+
+src_unpack() {
+	default
+	[[ $PV = 9999* ]] && git-r3_src_unpack
+}
+
+src_prepare() {
+	# apply patches
+	if [[ ${PV} != 9999* && -n ${SRC_PATCHES} ]]; then
+		EPATCH_FORCE="yes" \
+		EPATCH_SOURCE="${WORKDIR}/patches" \
+		EPATCH_SUFFIX="patch" \
+		epatch
+	fi
+
+	# Solaris needs some recent POSIX stuff in our case
+	if [[ ${CHOST} == *-solaris* ]] ; then
+		sed -i -e "s/-DSVR4/-D_POSIX_C_SOURCE=200112L/" configure.ac || die
+	fi
+
+	base_src_prepare
+
+	eautoreconf
+	multilib_copy_sources
+}
+
+multilib_src_configure() {
+	local myconf
+
+	if use classic; then
+	# Configurable DRI drivers
+		driver_enable swrast
+
+	# Intel code
+		driver_enable video_cards_i915 i915
+		driver_enable video_cards_i965 i965
+		if ! use video_cards_i915 && \
+			! use video_cards_i965; then
+			driver_enable video_cards_intel i915 i965
+		fi
+
+		# Nouveau code
+		driver_enable video_cards_nouveau nouveau
+
+		# ATI code
+		driver_enable video_cards_r100 radeon
+		driver_enable video_cards_r200 r200
+		if ! use video_cards_r100 && \
+				! use video_cards_r200; then
+			driver_enable video_cards_radeon radeon r200
+		fi
+	fi
+
+	if use egl; then
+		myconf+="--with-egl-platforms=x11$(use wayland && echo ",wayland")$(use gbm && echo ",drm") "
+	fi
+
+	if use gallium; then
+		myconf+="
+			$(use_enable llvm gallium-llvm)
+			$(use_enable openvg)
+			$(use_enable openvg gallium-egl)
+			$(use_enable openmax omx)
+			$(use_enable r600-llvm-compiler)
+			$(use_enable vdpau)
+			$(use_enable xa)
+			$(use_enable xvmc)
+		"
+		gallium_enable swrast
+		gallium_enable video_cards_vmware svga
+		gallium_enable video_cards_nouveau nouveau
+		gallium_enable video_cards_i915 i915
+		gallium_enable video_cards_ilo ilo
+		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+="
+				$(use_enable opencl)
+				--with-opencl-libdir="${EPREFIX}/usr/$(get_libdir)/OpenCL/vendors/mesa"
+				--with-clang-libdir="${EPREFIX}/usr/lib"
+				"
+		fi
+	fi
+
+	# x86 hardened pax_kernel needs glx-rts, bug 240956
+	if use pax_kernel; then
+		myconf+="
+			$(use_enable x86 glx-rts)
+		"
+	fi
+
+	# on abi_x86_32 hardened we need to have asm disable  
+	if [[ ${ABI} == x86* ]] && use pic; then
+		myconf+=" --disable-asm"
+	fi
+
+	# build fails with BSD indent, bug #428112
+	use userland_GNU || export INDENT=cat
+
+	econf \
+		--enable-dri \
+		--enable-glx \
+		--enable-shared-glapi \
+		$(use_enable !bindist texture-float) \
+		$(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 osmesa) \
+		$(use_enable !udev sysfs) \
+		--enable-llvm-shared-libs \
+		--with-dri-drivers=${DRI_DRIVERS} \
+		--with-gallium-drivers=${GALLIUM_DRIVERS} \
+		PYTHON2="${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() {
+	prune_libtool_files --all
+	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 patents.txt for an explanation."
+	fi
+
+	local using_radeon r_flag
+	for r_flag in ${RADEON_CARDS}; do
+		if use video_cards_${r_flag}; then
+			using_radeon=1
+			break
+		fi
+	done
+
+	if [[ ${using_radeon} = 1 ]] && ! has_version media-libs/libtxc_dxtn; then
+		elog "Note that in order to have full S3TC support, it is necessary to install"
+		elog "media-libs/libtxc_dxtn as well. This may be necessary to get nice"
+		elog "textures in some apps, and some others even require this to run."
+	fi
+}
+
+pkg_prerm() {
+	if use openmax; then
+		rm "${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
+}