Add patches for XFS v5 superblocks, bug 525682. Fix build on musl, bug 529356.
authorMike Gilbert <floppym@gentoo.org>
Sun, 1 Feb 2015 18:43:56 +0000 (18:43 +0000)
committerMike Gilbert <floppym@gentoo.org>
Sun, 1 Feb 2015 18:43:56 +0000 (18:43 +0000)
Package-Manager: portage-2.2.15/cvs/Linux x86_64
Manifest-Sign-Key: 0x0BBEEA1FEA4843A4

sys-boot/grub/ChangeLog
sys-boot/grub/Manifest
sys-boot/grub/grub-2.02_beta2-r7.ebuild [new file with mode: 0644]

index 94e2f9af901e1ed7d26e933a2de5ffba28d33c73..5e16d054eb20b8f780aa68c45ed3bdef0e10c8eb 100644 (file)
@@ -1,6 +1,11 @@
 # ChangeLog for sys-boot/grub
 # Copyright 1999-2015 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/sys-boot/grub/ChangeLog,v 1.340 2015/01/04 03:16:03 floppym Exp $
+# $Header: /var/cvsroot/gentoo-x86/sys-boot/grub/ChangeLog,v 1.341 2015/02/01 18:43:52 floppym Exp $
+
+*grub-2.02_beta2-r7 (01 Feb 2015)
+
+  01 Feb 2015; Mike Gilbert <floppym@gentoo.org> +grub-2.02_beta2-r7.ebuild:
+  Add patches for XFS v5 superblocks, bug 525682. Fix build on musl, bug 529356.
 
   04 Jan 2015; Mike Gilbert <floppym@gentoo.org> grub-2.00_p5107-r2.ebuild,
   grub-2.02_beta2-r3.ebuild, grub-2.02_beta2-r6.ebuild, grub-9999-r1.ebuild:
index 02b135f3014373420d981518b955d204c2a3ffe5..6bc18afff9be0763d75229da6cb5b4e0034936eb 100644 (file)
@@ -11,6 +11,7 @@ DIST grub-0.97-patches-1.14.tar.bz2 52916 SHA256 5c7ca31fd9b2123471daf2e46a1936c
 DIST grub-0.97.tar.gz 971783 SHA256 4e1d15d12dbd3e9208111d6b806ad5a9857ca8850c47877d36575b904559260b SHA512 c2bc9ffc8583aeae71cee9ddcc4418969768d4e3764d47307da54f93981c0109fb07d84b061b3a3628bd00ba4d14a54742bc04848110eb3ae8ca25dbfbaabadb WHIRLPOOL 0ad7f5dc035e2a3ad5fd29b6388f06fd12a8cc694117b4cbd42b5302433aa522db23566222d35219fe17fb95edb5090553156198507f70208eda5d858fd52dd5
 DIST grub-2.00_p5107.tar.xz 5836972 SHA256 92fd8f93621e7083f32ba6ef407f2984e5d3caaafdc35fb3d89ed054ca7c4dac SHA512 a70017dfc837e8fa869af7f71ca6191973f3f44f5a93378100cff5da425aa132b3903a3602ab907ef070872bb7a17f0586c8415845645c596d0621a4929ca83d WHIRLPOOL 5d88806fc849d2ff78ca590312110be4505e2801fee7c68faba39a54a44eedc16eb25dad88f1ff0058dea2e98382944c7e7632ccfa6f4a171ff0ef00cf67fd2d
 DIST grub-2.02_beta2-gentoo-r1.tar.xz 8048 SHA256 9a69edb0d64024b785a7f1bca58269b11e1be40f13ff2a96247249594bdb47d2 SHA512 c2ddaa188e7a2747e2256d0bb1e7c42427d5733cced3ff4b334be0671da8fab8d370861cdfee0319b4a29903a247375cf2e2a56955cc38e94a303bac5a93d974 WHIRLPOOL 0d923ed97921e145857580f7cff1f63278a4a95563d6e346b3680581991f9c7ad6d9b9965d40e407448392ee37b8c7862068281ac8f66b2a71856e1035f28eda
+DIST grub-2.02_beta2-gentoo-r2.tar.xz 14200 SHA256 a8033930576386cda0b86c4e487a652f9556b2068d5ce4988619868112ddf732 SHA512 dc375eb3b3f79c2205fe3528d13693c2d2d0df95dd474e6b737f3cec66be8fc8a139f83254289c27abf1640f73f1fa769c21dc6214ba68fd6eeb116a402bdb55 WHIRLPOOL 93686f4fabf41318b4b01c2969f55644dc2978407da999bdd296713e974ac36f5de11a0e7b3e00588a90c03b36777b49fb7a79988d89b9436f582064faad17ec
 DIST grub-2.02_beta2-gentoo.tar.xz 6916 SHA256 63453b35faa6e02cc6e3067160158a591ed8d1e417fc2d1fce25556b28f76e03 SHA512 edc37adae1a4c9bad4bb29f335379e1e2b0a25ba7ef2768689fe0dfc236ea7057d80699659fd5facda431df957073827eba1cd83dd0204e81f068570de3722a7 WHIRLPOOL b463cb3f4a714b20845d3dbd493a0d3408a47a1fe140ca3a4dffa77052f9bfcf25046de7881e516022aa970c48701a1278cd8b598e8e1ce03a28347fbd68dab0
 DIST grub-2.02~beta2.tar.xz 5798740 SHA256 f6c702b2a8ea58f27a2b02928bb77973cb5a827af08f63db38c471c0a01b418d SHA512 359903928febce1df53b3bd38aab701b4ea010dfad0dee434e853c865af4bbc60d115e61eac100c79f18d89aa78b2216ef20123f4ef04cc948ecbe226ea1a58c WHIRLPOOL f92e94f43888648484a972a0c82b0a2ac4dc7fbdd6e35ca8b11a6ee92168ac8cf7ee68987b84697ec46ad18189e5c5c9aee8105b91bb131cd7f6f499f45cd58f
 DIST splash.xpm.gz 33856 SHA256 b95600f777331b0dd31d51c68f60f0e846e4c8b628857a41165f4e6b30e6acaf SHA512 5ae1f786f7d46a95a7061068d5b2b3ad64607c7b190d6f28379508c5dce67e26308325bfd637542a84855dfcf1ea3d143947326fdb189a6a8972208d3ead23da WHIRLPOOL d95b7b588ea8ac7c2c8c53eb8057aef21c825da6411afe3b7e864c606aeffaaebce8ae41ce3e979f277bd6b48a9e82a1f2ea8afc836213b56523d8a854227d7b
@@ -23,13 +24,14 @@ EBUILD grub-0.97-r14.ebuild 10014 SHA256 2e9e0186fe10825696eea49800abba52c6b88a5
 EBUILD grub-2.00_p5107-r2.ebuild 8176 SHA256 dd465775321948d280745f53ec053bbde5adba0ac9d2455dbfee12276797c11b SHA512 d9f94d5b5cf3c098ef4a4dc5c80ecfe67b0e507a6b4e9b2e950c4ca586176ef23cc5e4ca877e5409ca05bfad014a27a5c76f239813ca19e9ef4f37361119ccfc WHIRLPOOL 22bd70e31bbfc2d24b89b4e2ffd14410c139b6fb909cbe29f335fe6b924daf926e42404dbf69f37e2f34a7cfc9519f42ae130f10e7b6c6b777a7b8897d5b045d
 EBUILD grub-2.02_beta2-r3.ebuild 8348 SHA256 c1750499c8b3b454371f8ab1ea74e8f31e4f8480aa5e10759a18cdb9fde932c3 SHA512 15999e0d6f6f60f91c4ee9c4eb69e2f30f7f64df8fcd812589b8cad9eb6c571187c2ff51bcf6b7d6882f70f99339010da2719ae4006bb9639a03cff6fadc03d0 WHIRLPOOL 897cc2f01a91bcc31db44d781aa81ba59188bd00a363a39baa4352715d29194abb34dbc656a77d9aa2568a279700cb39f4f9412381cb97fe8f77f9be76f789be
 EBUILD grub-2.02_beta2-r6.ebuild 8596 SHA256 a6d5a30153af46aa865e59e45c7ce5ac0e8105a94c9cbda57b8d1bc14ecbc042 SHA512 25d90bd657251203e4318befa7238d691303b6789af87fe6cdda168886f6b248e510a36f33244e6bc698accb911954ee6ea42d557bcb3124178b69fca7b12d3d WHIRLPOOL 9bc224bd350b928ae1471437070bef2ef145913188e64b658bf181d2f61e75065862aa2b61bb8175e4832eaedb2e06704f5d4ce2258f1edd3a2b8ff67ab093ca
+EBUILD grub-2.02_beta2-r7.ebuild 8596 SHA256 6fe8dabf7eb502a914f197dd398e8316823a9340656aacab5664230830f05bbb SHA512 69b12c442a5932721148d87bda1ad34aaa7d5aea600f1f9c82b1e3b58518f9e4e17d0bd0282af6848be7ee1015d55be431b5235224be3198a4bf24b49c437bba WHIRLPOOL 85b00e9d0f9b0b332e01547b4c9a5c11f8aa8c56bde8c2762a77c5eb07757f9cdd63cd9dadb7367e025b9a277d19cb3d6d018606ebf40879362bf5f53e3d1733
 EBUILD grub-9999-r1.ebuild 8302 SHA256 a5e9d83f0a47f04d1d34b22667e0b75a55839fe972bdfcefe6ed35f08ff1997f SHA512 4d5a087603527c759212e93d2ff855742ac7531e35b46b9cbf62316c935cb94e822cef66e663933a0c5c6fe7d2cda4a8b4ddf145f5101e2ce72b584048473072 WHIRLPOOL ee01fd4d456788008acff86dbb51170078716714ffa08bade06e138cb6fc14792249ab390544b02a826d1bcb69b215aa2da1fd8a7a7e32fd7cfb9c8086e7aa30
-MISC ChangeLog 65273 SHA256 c90fba81c7f6c23533db9b738a69be13d90a97faf005e6e33c8518c7d12264fa SHA512 e748d63413dbd9c46fad410123812870cb1dc44a3d8f818acc40d298df8b3a6612ef5618b27cd6f7b2329001a0467f4b4ef9ba84a0752028957d9b85db8267d7 WHIRLPOOL 300f1a8bd06f6b8179e84c18908d9ccfbb0e549deeaec2d1aa4cb548cbde474762391c6afb7abbac5c10dbe4f40c332a1ba0d211c2397ab5700f10bf27451f64
+MISC ChangeLog 65467 SHA256 3370d082b54a6d4881fe83079edb667396c93b456f2e982717ec5aaa21915ad7 SHA512 2bcb396482c57b5a5ffcbfcd4b8ac43c46665afcfd984dbe9952734b3e8e215960998c3cbec385c8c2d54f56f75b3261ea8069a193091f2f7e6d6d361e417e5f WHIRLPOOL 6421199829c17954b897c918441d066215021d3b6c2c8c4f518f11ed7e5474d3d7f7842e3336927e25547754e18463ce2011874e410a7bf260545341d6e225f9
 MISC metadata.xml 876 SHA256 dbd75c8e18ec8479718c0d802e6563535e9ffe5429727bea5b26133bb41abca2 SHA512 7a617c5f150445add695fda85610aae706070ca1368e250a4e3858c817e90322860174e436a60268d7ff66f33bc7672aa6d4cdb8b705e12851b25666eb51e13b WHIRLPOOL bf9ba7714a9f41789778c97c0387f5cb6be6e985f63953ab25f12bfad526ca48ef973f202cfd0d8a95dc8dd595d8b1a12483403ece3a5616e24f417e42b4c303
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
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-gyrbclLy1544NUbuzl0BAJ0nmb4YelH4xhszm5hNu+yVNePzPjGoAfrqzeC7CDbg
-=NXV4
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+=HfDs
 -----END PGP SIGNATURE-----
diff --git a/sys-boot/grub/grub-2.02_beta2-r7.ebuild b/sys-boot/grub/grub-2.02_beta2-r7.ebuild
new file mode 100644 (file)
index 0000000..abcebc1
--- /dev/null
@@ -0,0 +1,329 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sys-boot/grub/grub-2.02_beta2-r7.ebuild,v 1.1 2015/02/01 18:43:52 floppym Exp $
+
+EAPI=5
+
+AUTOTOOLS_AUTORECONF=1
+GRUB_AUTOGEN=1
+
+if [[ -n ${GRUB_AUTOGEN} ]]; then
+       PYTHON_COMPAT=( python{2_6,2_7,3_2,3_3,3_4} )
+       inherit python-any-r1
+fi
+
+inherit autotools-utils bash-completion-r1 eutils flag-o-matic mount-boot multibuild pax-utils toolchain-funcs versionator
+
+if [[ ${PV} != 9999 ]]; then
+       if [[ ${PV} == *_alpha* || ${PV} == *_beta* || ${PV} == *_rc* ]]; then
+               # The quote style is to work with <=bash-4.2 and >=bash-4.3 #503860
+               MY_P=${P/_/'~'}
+               SRC_URI="mirror://gnu-alpha/${PN}/${MY_P}.tar.xz
+                       http://dev.gentoo.org/~floppym/dist/${P}-gentoo-r2.tar.xz"
+               S=${WORKDIR}/${MY_P}
+       else
+               SRC_URI="mirror://gnu/${PN}/${P}.tar.xz
+                       http://dev.gentoo.org/~floppym/dist/${P}.tar.xz"
+               S=${WORKDIR}/${P%_*}
+       fi
+       KEYWORDS="~amd64 ~x86"
+       PATCHES=()
+else
+       inherit git-r3
+       EGIT_REPO_URI="git://git.sv.gnu.org/grub.git
+               http://git.savannah.gnu.org/r/grub.git"
+fi
+
+DEJAVU=dejavu-sans-ttf-2.34
+UNIFONT=unifont-7.0.01
+SRC_URI+=" mirror://gnu/unifont/${UNIFONT}/${UNIFONT}.pcf.gz
+       truetype? ( mirror://sourceforge/dejavu/${DEJAVU}.zip )"
+
+DESCRIPTION="GNU GRUB boot loader"
+HOMEPAGE="http://www.gnu.org/software/grub/"
+
+# Includes licenses for dejavu and unifont
+LICENSE="GPL-3 truetype? ( BitstreamVera GPL-2-with-font-exception )"
+SLOT="2"
+IUSE="debug device-mapper doc efiemu mount +multislot nls static sdl test truetype libzfs"
+
+GRUB_ALL_PLATFORMS=(
+       # everywhere:
+       emu
+       # mips only:
+       qemu-mips loongson
+       # amd64, x86, ppc, ppc64:
+       ieee1275
+       # amd64, x86:
+       coreboot multiboot efi-32 pc qemu xen
+       # amd64, ia64:
+       efi-64
+)
+IUSE+=" ${GRUB_ALL_PLATFORMS[@]/#/grub_platforms_}"
+
+# os-prober: Used on runtime to detect other OSes
+# xorriso (dev-libs/libisoburn): Used on runtime for mkrescue
+RDEPEND="
+       app-arch/xz-utils
+       >=sys-libs/ncurses-5.2-r5
+       debug? (
+               sdl? ( media-libs/libsdl )
+       )
+       device-mapper? ( >=sys-fs/lvm2-2.02.45 )
+       libzfs? ( sys-fs/zfs )
+       mount? ( sys-fs/fuse )
+       truetype? ( media-libs/freetype:2= )
+       ppc? ( sys-apps/ibm-powerpc-utils sys-apps/powerpc-utils )
+       ppc64? ( sys-apps/ibm-powerpc-utils sys-apps/powerpc-utils )
+"
+DEPEND="${RDEPEND}
+       ${PYTHON_DEPS}
+       app-misc/pax-utils
+       sys-devel/flex
+       sys-devel/bison
+       sys-apps/help2man
+       sys-apps/texinfo
+       grub_platforms_coreboot? ( media-libs/freetype:2 )
+       grub_platforms_qemu? ( media-libs/freetype:2 )
+       grub_platforms_ieee1275? ( media-libs/freetype:2 )
+       grub_platforms_loongson? ( media-libs/freetype:2 )
+       grub_platforms_xen? ( app-emulation/xen-tools )
+       static? (
+               app-arch/xz-utils[static-libs(+)]
+               truetype? (
+                       app-arch/bzip2[static-libs(+)]
+                       media-libs/freetype[static-libs(+)]
+                       sys-libs/zlib[static-libs(+)]
+               )
+       )
+       test? (
+               dev-libs/libisoburn
+               app-emulation/qemu
+       )
+       truetype? ( app-arch/unzip )
+"
+RDEPEND+="
+       kernel_linux? (
+               grub_platforms_efi-32? ( sys-boot/efibootmgr )
+               grub_platforms_efi-64? ( sys-boot/efibootmgr )
+       )
+       !multislot? ( !sys-boot/grub:0 )
+       nls? ( sys-devel/gettext )
+"
+
+DEPEND+=" !!=media-libs/freetype-2.5.4"
+
+STRIP_MASK="*/grub/*/*.{mod,img}"
+RESTRICT="test"
+
+QA_EXECSTACK="
+       usr/bin/grub*-emu*
+       usr/lib*/grub/*/*.mod
+       usr/lib*/grub/*/*.module
+       usr/lib*/grub/*/kernel.exec
+       usr/lib*/grub/*/kernel.img
+"
+
+QA_WX_LOAD="
+       usr/lib*/grub/*/kernel.exec
+       usr/lib*/grub/*/kernel.img
+       usr/lib*/grub/*/*.image
+"
+
+QA_PRESTRIPPED="
+       usr/lib.*/grub/.*/kernel.img
+"
+
+pkg_pretend() {
+       if [[ ${MERGE_TYPE} != binary ]]; then
+               # Bug 439082
+               if ! test-flags-CC -fuse-ld=bfd > /dev/null &&
+                       $(tc-getLD) --version | grep -q "GNU gold"; then
+                       eerror "GRUB does not function correctly when built with the gold linker."
+                       eerror "Please select the bfd linker with binutils-config."
+                       die "GNU gold detected"
+               fi
+       fi
+}
+
+src_unpack() {
+       if [[ ${PV} == 9999 ]]; then
+               git-r3_src_unpack
+       fi
+       default_src_unpack
+}
+
+src_prepare() {
+       EPATCH_SUFFIX="patch" EPATCH_FORCE="yes" epatch
+
+       [[ ${PATCHES} ]] && epatch "${PATCHES[@]}"
+
+       sed -i -e /autoreconf/d autogen.sh || die
+
+       if use multislot; then
+               # fix texinfo file name, bug 416035
+               sed -i -e 's/^\* GRUB:/* GRUB2:/' -e 's/(grub)/(grub2)/' docs/grub.texi || die
+       fi
+
+       epatch_user
+
+       if [[ -n ${GRUB_AUTOGEN} ]]; then
+               python_setup
+               bash autogen.sh || die
+       fi
+
+       if [[ -n ${AUTOTOOLS_AUTORECONF} ]]; then
+               autopoint() { return 0; }
+               eautoreconf
+       fi
+}
+
+setup_fonts() {
+       ln -s "${WORKDIR}/${UNIFONT}.pcf" unifont.pcf || die
+       if use truetype; then
+               ln -s "${WORKDIR}/${DEJAVU}/ttf/DejaVuSans.ttf" DejaVuSans.ttf || die
+       fi
+}
+
+grub_configure() {
+       local platform
+
+       case ${MULTIBUILD_VARIANT} in
+               efi-32)
+                       platform=efi
+                       if [[ ${CTARGET:-${CHOST}} == x86_64* ]]; then
+                               local CTARGET=${CTARGET:-i386}
+                       fi ;;
+               efi-64)
+                       platform=efi
+                       if [[ ${CTARGET:-${CHOST}} == i?86* ]]; then
+                               local CTARGET=${CTARGET:-x86_64}
+                               local TARGET_CFLAGS="-Os -march=x86-64 ${TARGET_CFLAGS}"
+                               local TARGET_CPPFLAGS="-march=x86-64 ${TARGET_CPPFLAGS}"
+                               export TARGET_CFLAGS TARGET_CPPFLAGS
+                       fi ;;
+               guessed) ;;
+               *)      platform=${MULTIBUILD_VARIANT} ;;
+       esac
+
+       local myeconfargs=(
+               --disable-werror
+               --program-prefix=
+               --libdir="${EPREFIX}"/usr/lib
+               --htmldir="${EPREFIX}"/usr/share/doc/${PF}/html
+               $(use_enable debug mm-debug)
+               $(use_enable debug grub-emu-usb)
+               $(use_enable device-mapper)
+               $(use_enable mount grub-mount)
+               $(use_enable nls)
+               $(use_enable truetype grub-mkfont)
+               $(use_enable libzfs)
+               $(use sdl && use_enable debug grub-emu-sdl)
+               ${platform:+--with-platform=}${platform}
+
+               # Let configure detect this where supported
+               $(usex efiemu '' '--disable-efiemu')
+       )
+
+       if use multislot; then
+               myeconfargs+=( --program-transform-name="s,grub,grub2," )
+       fi
+
+       mkdir -p "${BUILD_DIR}" || die
+       run_in_build_dir setup_fonts
+
+       autotools-utils_src_configure
+}
+
+src_configure() {
+       # Bug 508758.
+       replace-flags -O3 -O2
+
+       # We don't want to leak flags onto boot code.
+       export HOST_CCASFLAGS=${CCASFLAGS}
+       export HOST_CFLAGS=${CFLAGS}
+       export HOST_CPPFLAGS=${CPPFLAGS}
+       export HOST_LDFLAGS=${LDFLAGS}
+       unset CCASFLAGS CFLAGS CPPFLAGS LDFLAGS
+
+       use static && HOST_LDFLAGS+=" -static"
+
+       export TARGET_LDFLAGS+=" $(test-flags-CC -fuse-ld=bfd)"
+
+       tc-export CC NM OBJCOPY STRIP
+       export TARGET_CC=${TARGET_CC:-${CC}}
+       tc-export BUILD_CC # Bug 485592
+
+       # Portage will take care of cleaning up GRUB_PLATFORMS
+       MULTIBUILD_VARIANTS=( ${GRUB_PLATFORMS:-guessed} )
+       multibuild_parallel_foreach_variant grub_configure
+}
+
+src_compile() {
+       # Sandbox bug 404013.
+       use libzfs && addpredict /etc/dfs:/dev/zfs
+
+       multibuild_foreach_variant autotools-utils_src_compile
+
+       use doc && multibuild_for_best_variant \
+               autotools-utils_src_compile -C docs html
+}
+
+src_test() {
+       # The qemu dependency is a bit complex.
+       # You will need to adjust QEMU_SOFTMMU_TARGETS to match the cpu/platform.
+       multibuild_foreach_variant autotools-utils_src_test
+}
+
+src_install() {
+       multibuild_foreach_variant autotools-utils_src_install \
+               bashcompletiondir="$(get_bashcompdir)"
+
+       local grub=grub
+       if use multislot; then
+               grub=grub2
+               mv "${ED%/}"/usr/share/info/grub{,2}.info || die
+               mv "${ED%/}"/$(get_bashcompdir)/grub{,2} || die
+       fi
+
+       bashcomp_alias ${grub} ${grub}-{install,set-default,mkrescue,reboot,script-check,editenv,sparc64-setup,mkfont,mkpasswd-pbkdf2,mkimage,bios-setup,mkconfig,probe}
+
+       use doc && multibuild_for_best_variant run_in_build_dir \
+               emake -C docs DESTDIR="${D}" install-html
+
+       insinto /etc/default
+       newins "${FILESDIR}"/grub.default-3 grub
+}
+
+pkg_postinst() {
+       mount-boot_mount_boot_partition
+
+       if [[ -e "${ROOT%/}/boot/grub2/grub.cfg"  ]]; then
+               ewarn "The grub directory has changed from /boot/grub2 to /boot/grub."
+               ewarn "Please run grub2-install and grub2-mkconfig -o /boot/grub/grub.cfg."
+
+               if [[ ! -e "${ROOT%/}/boot/grub/grub.cfg" ]]; then
+                       mkdir -p "${ROOT%/}/boot/grub"
+                       ln -s ../grub2/grub.cfg "${ROOT%/}/boot/grub/grub.cfg"
+               fi
+       fi
+
+       mount-boot_pkg_postinst
+
+       elog "For information on how to configure GRUB2 please refer to the guide:"
+       elog "    http://wiki.gentoo.org/wiki/GRUB2_Quick_Start"
+
+       if has_version 'sys-boot/grub:0'; then
+               elog "A migration guide for GRUB Legacy users is available:"
+               elog "    https://wiki.gentoo.org/wiki/GRUB2_Migration"
+       fi
+
+       if [[ -z ${REPLACING_VERSIONS} ]]; then
+               if ! has_version sys-boot/os-prober; then
+                       elog "Install sys-boot/os-prober to enable detection of other operating systems using grub2-mkconfig."
+               fi
+               if ! has_version dev-libs/libisoburn; then
+                       elog "Install dev-libs/libisoburn to enable creation of rescue media using grub2-mkrescue."
+               fi
+       fi
+}