commit:     d1213c7db33bf8664a9a03b742dcca45c52813cf
Author:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
AuthorDate: Thu Feb 11 22:23:08 2021 +0000
Commit:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
CommitDate: Thu Feb 11 23:40:57 2021 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d1213c7d

dev-lang/rust: bump to 1.50.0

Package-Manager: Portage-3.0.14, Repoman-3.0.2
Signed-off-by: Georgy Yakovlev <gyakovlev <AT> gentoo.org>

 dev-lang/rust/Manifest           |  15 +
 dev-lang/rust/rust-1.50.0.ebuild | 619 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 634 insertions(+)

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index e296ab86edf..74eff5ba8e9 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -54,7 +54,22 @@ DIST rust-1.48.0-powerpc64le-unknown-linux-gnu.tar.xz 
124335896 BLAKE2B fe95cb27
 DIST rust-1.48.0-s390x-unknown-linux-gnu.tar.xz 127221600 BLAKE2B 
08511be6aadc0feb36caa19df5914a207565eed3b4b3914cad7fc8f7170011a7431c14d50b1334f5d5e00b4c94e7e84ee59afad179286e889480cc9b21e1f402
 SHA512 
b2b1565f3b1cc0c3bf4aa06aba1da7df775c6e29c892ca7727d0e549f175b632080433be2586e799c5636231de6c678f0228dedee8358fbf167016a1f7d25389
 DIST rust-1.48.0-x86_64-unknown-linux-gnu.tar.xz 155254844 BLAKE2B 
37bce978eb297bb1732f9d513bb6fdcee4aefc42a578496a84b5f8abbb9f90f1c524c73f28c85f33c25a365bf5ba566253b1739009bb112c2e1d46a2ed978e10
 SHA512 
0784e156e70c47386abfa88ecfeb62b1109364459b1fee225de0749c30379c4eb443ff3ff7faa7dc1a6ff373bc6eb43997007f937889cb35daf940a74641753b
 DIST rust-1.48.0-x86_64-unknown-linux-musl.tar.xz 168361012 BLAKE2B 
efeb9a9812f2fa2cbf1cfd963b5b714cf18d73ca9b7a3de4efa701acf7e2e8fc3b610cd90f7391b10bddd1c9d44b8b0aa910f58ce739750d4e910b063825dc28
 SHA512 
7188fb0b1bf6fd6ab320089cd17f334867baefec1a9c57a81e6cb729276456e56850938dbd0eafbc52375266a87392ad3045a4dbd2c41689bba6b0da152e4034
+DIST rust-1.49.0-aarch64-unknown-linux-gnu.tar.xz 179627172 BLAKE2B 
911fc176a7161bf3ca1a6ec01ec38d4f1792b11feb3c24c9587f8feb2923b42aa97f0e3391449ee1189507b9bdc2ef16be8f064ac3161f73aba18fd7b11c8f5d
 SHA512 
fa81b618359c2952de941e094eabfe2966e3c1a39a1b20452a77f1a68a54dde9cc5cade18db911cf448ffe947d934461ce752112bd9b5b5430e1fcdabbd8b56a
+DIST rust-1.49.0-arm-unknown-linux-gnueabi.tar.xz 172021916 BLAKE2B 
69e80df9f8d582c8216adfcd27ce8a19a9af49f27423fc3ee478ccb8b60b489e36c1f38633c86c58a504b2110cebf4026dc418e55897caf60865c21209ea2366
 SHA512 
2ea1d8564577cb4f687384e0d933e6ed7e1e5c95aeb49410d660409a23867959bc175344fa00bdc342cf511ea867cb2d97507af117e7d5b34714e69d4b8ffaff
+DIST rust-1.49.0-arm-unknown-linux-gnueabihf.tar.xz 173557760 BLAKE2B 
63c1815b3bfdcb5bf1c745bd8b85cee052b2c85f42a800166da6ee66374716e899919fac7b9c75d0a6b0ddc963e22e2b842ac382eca431433cb1ef4c1d568ad4
 SHA512 
9c4a49b8a3bf11d5e0f3d54032e2dfee8779f3fb68676a219c9b8e344539a3dd840d912167783f3fbaa3bd3fbf73b6bdd5afa9343c042a67496ab57c9a9ca96e
+DIST rust-1.49.0-armv7-unknown-linux-gnueabihf.tar.xz 176194076 BLAKE2B 
1d2a1eca1d44d48cdd542411acc0f1a81767b6e62c744c800a840f3ecdcc060acd7552d342539230f85cf3e2771f8aa4a2c1ff88efaccf7021bbb2e0af71c222
 SHA512 
1cba85fc958371aeb1d521e8842ad576e65d244147e2c75c34eaa776552ed025434d10284fa976d901d6cede69f6db3e5fdd770005ca0b93bb5e3202b9f9392a
+DIST rust-1.49.0-i686-unknown-linux-gnu.tar.xz 201492368 BLAKE2B 
b666693ffd3468330c3aaabc81556d3f6c907e136f98edde9ea4605bd95a5750e57432a51e5eba0643a816b4281129f1cc295cf9821d5f285cdfd8cb3cb68c3f
 SHA512 
b4d39cb234314f013969b5db3d365d21719d7a01f2dc0816e4f221c5e6d4abecd7f9e83f54b8640173d00d3e701cb3cbb61cef32f00db9356139005a1ce3bd19
+DIST rust-1.49.0-mips-unknown-linux-gnu.tar.xz 134041460 BLAKE2B 
0e779b3494221f22529ba7a4b9e1098186965d36f7cb94b5d76c84bd4703c354ebc57aa03a58fe3b5592c1543ac6193575f9d443cd8fa663a69d9af1ae7d0b82
 SHA512 
9293814a64d7382f97beb137ccb8beeeb76ae5f71d6db7d2c70f3c643a877f5991c0abc2d53270bccaa6aa5c8de4f0e46fe4b92ad09e2253e5cd5487a3f46d6c
+DIST rust-1.49.0-mips64-unknown-linux-gnuabi64.tar.xz 143820152 BLAKE2B 
f22869487eac68f5ed698da1b05b1c53ae138cff79d2c5011008663b027858c5b91ce1b2f26924ecc17d13ca9559ff444e1b03a44a5b3b536e66753075c8d05a
 SHA512 
ea1d90a388c44a2e5bd5f51dd5e8b95721e49c8284369cd638560e9c729c8a7c54ba6cccf55547f0b0b1731498623eaf743783cfd67e61c13f89f0ad9275c051
+DIST rust-1.49.0-mipsel-unknown-linux-gnu.tar.xz 140145252 BLAKE2B 
5a26ca9e2af4a2d96c34da29e50c5c68b1fb0f2e6db20685853a4211042aee76f0f86b17c4697bcecce99de21ac7b60b055ed43cd2acf03dfa043eb5e3546692
 SHA512 
a2079d5068737cae36532c2922fc4aebf4aac723208804a128a1234ae78868f20a6559a967cf01a456ba7de2bf48ea3961fc9a31dd3bc45130b0de328a712295
+DIST rust-1.49.0-powerpc-unknown-linux-gnu.tar.xz 147163992 BLAKE2B 
4822af4b54a22214425e0dd993081f0bc7b0ae0973c0e11d021a2a8671f05272b2cb6b3ca307eef9b3ad25db6a1eef7976f1e8e4ead8ac4c5226d9c7596c0f6d
 SHA512 
905c624baccf0bbcd166407a8722909b2645c7e1993e80a37aa4cfe43d0dce5b92db2c5443295ecb79fa6c3c2cbe6e0e67ad7f8ba312075fb8960cbe50183a25
+DIST rust-1.49.0-powerpc64-unknown-linux-gnu.tar.xz 160585188 BLAKE2B 
f0e4a5da3767b1bfb633c899c1b9b2ee9725d8bea9154142037cbcc9212d67a364f0eb130ea4d2a4c62d0fe55a8d9d880faac2f6e167155a99a235f7ee28fc1d
 SHA512 
36f94b0ae399f872a22c697225abcb35a893ae6e4ed369961edb693299cb58e294267b1d73a99555057618f179202a70ae2fdcff2b3bedbabf2774b3809a2a62
+DIST rust-1.49.0-powerpc64le-unknown-linux-gnu.tar.xz 169253520 BLAKE2B 
4648467a84d7f81f63ddf610fce6e1e2388ce5c91a7ce73c8b8d054356bfcba379d4d0a543fdbc9bad9b689b10f8dffa4c145b83ff02ac1d77ede7f600bb5924
 SHA512 
c17eb27ec4dbcc56da3edffbc57e0edda99744d6a0d38369fa08af066894aeb13dd78c7b8055f2246fc3bf13c654842675ea4df44b7bc8852e0f9952acdf7e7c
+DIST rust-1.49.0-s390x-unknown-linux-gnu.tar.xz 170753008 BLAKE2B 
a81618240d86d4a70bd27f3e33caf0258868539b3b081a8f8f461a3debf82ab1493fea18dd5a32083d1f34db268f4bff471f5f45fb3d4910dd9559f227dc3aab
 SHA512 
25259ea2e499c89459b14571e2c54f230d642af9cfe539dc2b8be15eff0e23b8c6e60af4c567bcbb6c6c185b4537eaab19c3395fce48b1f6e5ef1234efc31e3a
+DIST rust-1.49.0-x86_64-unknown-linux-gnu.tar.xz 144752500 BLAKE2B 
188fafdbff02cbffae22e8a48d259119c59aa435252477ba3b4f4522cc00c90d9a242bd5ac76e8d8210bd032b8f78538e5f95606fe2c862ffd7477acdfb6e1a7
 SHA512 
c008aa50e17db6a0134fb85235a958258d345410f5063bc77175f7c28b2e35895427b9e68cd1ac9acb769769c83313cd59fe6465b453e891cf415a2514b7722d
+DIST rust-1.49.0-x86_64-unknown-linux-musl.tar.xz 217795696 BLAKE2B 
264348951db96a9f046e4bec599b92a5ee6d185d961f833f8d2127c1ac4578b91401834d09b5eed421f03d14933ff3b2e85961ff09927d19bf6c701d80eb1b67
 SHA512 
be165de42e3acd50f6e6a21fe386ea2333fd0f19abedbb059d6eb8ce8c80a8e79257eab8a7775e3b72307596b52e803bd8c4c46330a6e66acbadbe2f63cea42a
 DIST rustc-1.46.0-src.tar.xz 101868452 BLAKE2B 
da9798596b124a10d79c236a871228f05e5f571d22c2259328e7026c91e088c85f5de9c0536a16531e0cb10477bfcd16d3ac11467979f5561cb6199442b877ef
 SHA512 
099857f1d295043587a4e2a65ef3e6a90e12c8b6958e98535a1656c113c553f9a9b621aba8a19cf21bd8d2c79d27cbfa4b8e6fabbcb3cbfee23b545be7b450b4
 DIST rustc-1.47.0-src.tar.xz 104143736 BLAKE2B 
0454094dde35275488046826da87655e51bf0795481d6d08fd70d644bfc12481bca8641166106ef32f20494906025244715b16ff21a1c023f4bd2818aab42521
 SHA512 
6ba83c0158f8130ddeae7e070417a2121d8a548c8fe97e28bce116d84048636c75aaee78e0c92cd43a50f5679a1223fc226cc8c5ba9bbd1465e84c5c6034d5c9
 DIST rustc-1.48.0-src.tar.xz 105951736 BLAKE2B 
42468fc5ac5e80c4793cfe0913cbb8e43a8def28cc8cf5ed25ab989561e2bf33e155c83e180183362535cbc9008f341eb1273087a2364672b1a4032ac2d6ca45
 SHA512 
4e12baa6893238a8d336ec9ebe891477d18676f271b32763474fa7a6a8b58fb3187dd4e2aa95bce482989b692cc2e1360221669d6811eec71b326f22a1756c23
 DIST rustc-1.49.0-src.tar.xz 108330280 BLAKE2B 
65e36253482ded2df225cbbf15253b6c9a8ae935053b071d9fb9e7b1d47d5d3ac47a138876e4a5cfeda455c655ac06ceff2658c8668cef7d2206116906740653
 SHA512 
fd8bc67ec0a73d3b6bf9c1fabb7ea981ef817644b4e6ced982fa90b12eae9b55de074634a670bdfb38bfee6588603e818ddcbcc2f2a05f83057c061b4194b4b7
+DIST rustc-1.50.0-src.tar.xz 108666272 BLAKE2B 
abb1b6f57093334bae5892dd99c964ffaf5e2b906cc92f0b92d5786cf80484cff923643169f24f4f92a5724c21b8bd671c72531c2cd1f6fbe0ea7107b5bd923b
 SHA512 
df3c83c0fdc9ebce6fdccddda781dea0cdbd88d2b2a8220cac40cc3a8fa957923ae834d1fa45283d4ad227b334bd9e220e37a4a1ad7a1c7aeb806ed9ed387245

diff --git a/dev-lang/rust/rust-1.50.0.ebuild b/dev-lang/rust/rust-1.50.0.ebuild
new file mode 100644
index 00000000000..e98848b6f30
--- /dev/null
+++ b/dev-lang/rust/rust-1.50.0.ebuild
@@ -0,0 +1,619 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{7..9} )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing 
multilib-build python-any-r1 rust-toolchain toolchain-funcs
+
+if [[ ${PV} = *beta* ]]; then
+       betaver=${PV//*beta}
+       BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+       MY_P="rustc-beta"
+       SLOT="beta/${PV}"
+       SRC="${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz"
+else
+       ABI_VER="$(ver_cut 1-2)"
+       SLOT="stable/${ABI_VER}"
+       MY_P="rustc-${PV}"
+       SRC="${MY_P}-src.tar.xz"
+       KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+fi
+
+RUST_STAGE0_VERSION="1.$(($(ver_cut 2) - 1)).0"
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/";
+
+SRC_URI="
+       https://static.rust-lang.org/dist/${SRC}
+       !system-bootstrap? ( $(rust_all_arch_uris rust-${RUST_STAGE0_VERSION}) )
+"
+
+# keep in sync with llvm ebuild of the same version as bundled one.
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430
+       NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/?}
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD-1 BSD-2 BSD-4 UoI-NCSA"
+
+IUSE="clippy cpu_flags_x86_sse2 debug doc libressl miri nightly 
parallel-compiler rls rustfmt system-bootstrap system-llvm test wasm 
${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# 1. List all the working slots (with min versions) in ||, newest first.
+# 2. Update the := to specify *max* version, e.g. < 12.
+# 3. Specify LLVM_MAX_SLOT, e.g. 11.
+LLVM_DEPEND="
+       || (
+               sys-devel/llvm:11[${LLVM_TARGET_USEDEPS// /,}]
+       )
+       <sys-devel/llvm-12:=
+       wasm? ( sys-devel/lld )
+"
+LLVM_MAX_SLOT=11
+
+# to bootstrap we need at least exactly previous version, or same.
+# most of the time previous versions fail to bootstrap with newer
+# for example 1.47.x, requires at least 1.46.x, 1.47.x is ok,
+# but it fails to bootstrap with 1.48.x
+# https://github.com/rust-lang/rust/blob/${PV}/src/stage0.txt
+BOOTSTRAP_DEPEND="||
+       (
+               =dev-lang/rust-$(ver_cut 1).$(($(ver_cut 2) - 1))*
+               =dev-lang/rust-bin-$(ver_cut 1).$(($(ver_cut 2) - 1))*
+               =dev-lang/rust-$(ver_cut 1).$(ver_cut 2)*
+               =dev-lang/rust-bin-$(ver_cut 1).$(ver_cut 2)*
+       )
+"
+
+BDEPEND="${PYTHON_DEPS}
+       app-eselect/eselect-rust
+       || (
+               >=sys-devel/gcc-4.7
+               >=sys-devel/clang-3.5
+       )
+       system-bootstrap? ( ${BOOTSTRAP_DEPEND} )
+       !system-llvm? (
+               dev-util/cmake
+               dev-util/ninja
+       )
+"
+
+DEPEND="
+       >=app-arch/xz-utils-5.2
+       net-misc/curl:=[http2,ssl]
+       sys-libs/zlib:=
+       !libressl? ( dev-libs/openssl:0= )
+       libressl? ( dev-libs/libressl:0= )
+       elibc_musl? ( sys-libs/libunwind:= )
+       system-llvm? (
+               ${LLVM_DEPEND}
+       )
+"
+
+# we need to block older versions due to layout changes.
+RDEPEND="${DEPEND}
+       app-eselect/eselect-rust
+       !<dev-lang/rust-1.47.0-r1
+       !<dev-lang/rust-bin-1.47.0-r1
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+       miri? ( nightly )
+       parallel-compiler? ( nightly )
+       test? ( ${ALL_LLVM_TARGETS[*]} )
+       wasm? ( llvm_targets_WebAssembly )
+       x86? ( cpu_flags_x86_sse2 )
+"
+
+# we don't use cmake.eclass, but can get a warnings
+CMAKE_WARN_UNUSED_CLI=no
+
+QA_FLAGS_IGNORED="
+       usr/lib/${PN}/${PV}/bin/.*
+       usr/lib/${PN}/${PV}/libexec/.*
+       usr/lib/${PN}/${PV}/lib/lib.*.so
+       usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/.*
+       usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_SONAME="
+       usr/lib/${PN}/${PV}/lib/lib.*.so.*
+       usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+# causes double bootstrap
+RESTRICT="test"
+
+PATCHES=(
+       "${FILESDIR}"/1.47.0-libressl.patch
+       "${FILESDIR}"/1.47.0-ignore-broken-and-non-applicable-tests.patch
+       "${FILESDIR}"/1.47.0-llvm-tensorflow-fix.patch
+       "${FILESDIR}"/1.49.0-gentoo-musl-target-specs.patch
+       "${FILESDIR}"/1.49.0-llvm-ver-display.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+toml_usex() {
+       usex "${1}" true false
+}
+
+boostrap_rust_version_check() {
+       # never call from pkg_pretend. eselect-rust may be not installed yet.
+       [[ ${MERGE_TYPE} == binary ]] && return
+       local rustc_wanted="$(ver_cut 1).$(($(ver_cut 2) - 1))"
+       local rustc_toonew="$(ver_cut 1).$(($(ver_cut 2) + 1))"
+       local rustc_version=( $(eselect --brief rust show 2>/dev/null) )
+       rustc_version=${rustc_version[0]#rust-bin-}
+       rustc_version=${rustc_version#rust-}
+
+       [[ -z "${rustc_version}" ]] && die "Failed to determine rust version, 
check 'eselect rust' output"
+
+       if ver_test "${rustc_version}" -lt "${rustc_wanted}" ; then
+               eerror "Rust >=${rustc_wanted} is required"
+               eerror "please run 'eselect rust' and set correct rust version"
+               die "selected rust version is too old"
+       elif ver_test "${rustc_version}" -ge "${rustc_toonew}" ; then
+               eerror "Rust <${rustc_toonew} is required"
+               eerror "please run 'eselect rust' and set correct rust version"
+               die "selected rust version is too new"
+       else
+               einfo "Using rust ${rustc_version} to build"
+       fi
+}
+
+pre_build_checks() {
+       local M=6144
+       M=$(( $(usex clippy 128 0) + ${M} ))
+       M=$(( $(usex miri 128 0) + ${M} ))
+       M=$(( $(usex rls 512 0) + ${M} ))
+       M=$(( $(usex rustfmt 256 0) + ${M} ))
+       M=$(( $(usex system-llvm 0 2048) + ${M} ))
+       M=$(( $(usex wasm 256 0) + ${M} ))
+       M=$(( $(usex debug 15 10) * ${M} / 10 ))
+       eshopts_push -s extglob
+       if is-flagq '-g?(gdb)?([1-9])'; then
+               M=$(( 15 * ${M} / 10 ))
+       fi
+       eshopts_pop
+       M=$(( $(usex system-bootstrap 0 1024) + ${M} ))
+       M=$(( $(usex doc 256 0) + ${M} ))
+       CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+pkg_pretend() {
+       pre_build_checks
+}
+
+pkg_setup() {
+       pre_build_checks
+       python-any-r1_pkg_setup
+
+       export LIBGIT2_NO_PKG_CONFIG=1 #749381
+
+       use system-bootstrap && boostrap_rust_version_check
+
+       if use system-llvm; then
+               llvm_pkg_setup
+
+               local llvm_config="$(get_llvm_prefix 
"$LLVM_MAX_SLOT")/bin/llvm-config"
+               export LLVM_LINK_SHARED=1
+               export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" 
--libdir)"
+       fi
+}
+
+src_prepare() {
+       if ! use system-bootstrap; then
+               local rust_stage0_root="${WORKDIR}"/rust-stage0
+               local rust_stage0="rust-${RUST_STAGE0_VERSION}-$(rust_abi)"
+
+               "${WORKDIR}/${rust_stage0}"/install.sh --disable-ldconfig \
+                       --destdir="${rust_stage0_root}" --prefix=/ || die
+       fi
+
+       default
+}
+
+src_configure() {
+       local rust_target="" rust_targets="" arch_cflags
+
+       # Collect rust target names to compile standard libs for all ABIs.
+       for v in $(multilib_get_enabled_abi_pairs); do
+               rust_targets="${rust_targets},\"$(rust_abi $(get_abi_CHOST 
${v##*.}))\""
+       done
+       if use wasm; then
+               rust_targets="${rust_targets},\"wasm32-unknown-unknown\""
+               if use system-llvm; then
+                       # un-hardcode rust-lld linker for this target
+                       # https://bugs.gentoo.org/715348
+                       sed -i '/linker:/ s/rust-lld/wasm-ld/' 
compiler/rustc_target/src/spec/wasm32_base.rs || die
+               fi
+       fi
+       rust_targets="${rust_targets#,}"
+
+       local tools="\"cargo\","
+       if use clippy; then
+               tools="\"clippy\",$tools"
+       fi
+       if use miri; then
+               tools="\"miri\",$tools"
+       fi
+       if use rls; then
+               tools="\"rls\",\"analysis\",\"src\",$tools"
+       fi
+       if use rustfmt; then
+               tools="\"rustfmt\",$tools"
+       fi
+
+       local rust_stage0_root
+       if use system-bootstrap; then
+               rust_stage0_root="$(rustc --print sysroot)"
+       else
+               rust_stage0_root="${WORKDIR}"/rust-stage0
+       fi
+
+       rust_target="$(rust_abi)"
+
+       cat <<- _EOF_ > "${S}"/config.toml
+               [llvm]
+               optimize = $(toml_usex !debug)
+               release-debuginfo = $(toml_usex debug)
+               assertions = $(toml_usex debug)
+               ninja = true
+               targets = "${LLVM_TARGETS// /;}"
+               experimental-targets = ""
+               link-shared = $(toml_usex system-llvm)
+               [build]
+               build = "${rust_target}"
+               host = ["${rust_target}"]
+               target = [${rust_targets}]
+               cargo = "${rust_stage0_root}/bin/cargo"
+               rustc = "${rust_stage0_root}/bin/rustc"
+               docs = $(toml_usex doc)
+               compiler-docs = $(toml_usex doc)
+               submodules = false
+               python = "${EPYTHON}"
+               locked-deps = true
+               vendor = true
+               extended = true
+               tools = [${tools}]
+               verbose = 2
+               sanitizers = false
+               profiler = false
+               cargo-native-static = false
+               [install]
+               prefix = "${EPREFIX}/usr/lib/${PN}/${PV}"
+               sysconfdir = "etc"
+               docdir = "share/doc/rust"
+               bindir = "bin"
+               libdir = "lib"
+               mandir = "share/man"
+               [rust]
+               # https://github.com/rust-lang/rust/issues/54872
+               codegen-units-std = 1
+               optimize = true
+               debug = $(toml_usex debug)
+               debug-assertions = $(toml_usex debug)
+               debuginfo-level-rustc = 0
+               backtrace = true
+               incremental = false
+               default-linker = "$(tc-getCC)"
+               parallel-compiler = $(toml_usex parallel-compiler)
+               channel = "$(usex nightly nightly stable)"
+               rpath = false
+               verbose-tests = true
+               optimize-tests = $(toml_usex !debug)
+               codegen-tests = true
+               dist-src = false
+               remap-debuginfo = true
+               lld = $(usex system-llvm false $(toml_usex wasm))
+               backtrace-on-ice = true
+               jemalloc = false
+               [dist]
+               src-tarball = false
+       _EOF_
+
+       for v in $(multilib_get_enabled_abi_pairs); do
+               rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+               arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+               cat <<- _EOF_ >> "${S}"/config.env
+                       CFLAGS_${rust_target}=${arch_cflags}
+               _EOF_
+
+               cat <<- _EOF_ >> "${S}"/config.toml
+                       [target.${rust_target}]
+                       cc = "$(tc-getBUILD_CC)"
+                       cxx = "$(tc-getBUILD_CXX)"
+                       linker = "$(tc-getCC)"
+                       ar = "$(tc-getAR)"
+               _EOF_
+               # librustc_target/spec/linux_musl_base.rs sets 
base.crt_static_default = true;
+               if use elibc_musl; then
+                       cat <<- _EOF_ >> "${S}"/config.toml
+                               crt-static = false
+                       _EOF_
+               fi
+               if use system-llvm; then
+                       cat <<- _EOF_ >> "${S}"/config.toml
+                               llvm-config = "$(get_llvm_prefix 
"${LLVM_MAX_SLOT}")/bin/llvm-config"
+                       _EOF_
+               fi
+       done
+       if use wasm; then
+               cat <<- _EOF_ >> "${S}"/config.toml
+                       [target.wasm32-unknown-unknown]
+                       linker = "$(usex system-llvm lld rust-lld)"
+               _EOF_
+       fi
+
+       if [[ -n ${I_KNOW_WHAT_I_AM_DOING_CROSS} ]]; then # whitespace 
intentionally shifted below
+       # experimental cross support
+       # discussion: https://bugs.gentoo.org/679878
+       # TODO: c*flags, clang, system-llvm, cargo.eclass target support
+       # it would be much better if we could split out stdlib
+       # complilation to separate ebuild and abuse CATEGORY to
+       # just install to /usr/lib/rustlib/<target>
+
+       # extra targets defined as a bash array
+       # spec format:  <LLVM target>:<rust-target>:<CTARGET>
+       # best place would be /etc/portage/env/dev-lang/rust
+       # Example:
+       # RUST_CROSS_TARGETS=(
+       #       "AArch64:aarch64-unknown-linux-gnu:aarch64-unknown-linux-gnu"
+       # )
+       # no extra hand holding is done, no target transformations, all
+       # values are passed as-is with just basic checks, so it's up to user to 
supply correct values
+       # valid rust targets can be obtained with
+       #       rustc --print target-list
+       # matching cross toolchain has to be installed
+       # matching LLVM_TARGET has to be enabled for both rust and llvm (if 
using system one)
+       # only gcc toolchains installed with crossdev are checked for now.
+
+       # BUG: we can't pass host flags to cross compiler, so just filter for 
now
+       # BUG: this should be more fine-grained.
+       filter-flags '-mcpu=*' '-march=*' '-mtune=*'
+
+       local cross_target_spec
+       for cross_target_spec in "${RUST_CROSS_TARGETS[@]}";do
+               # extracts first element form <LLVM 
target>:<rust-target>:<CTARGET>
+               local cross_llvm_target="${cross_target_spec%%:*}"
+               # extracts toolchain triples, <rust-target>:<CTARGET>
+               local cross_triples="${cross_target_spec#*:}"
+               # extracts first element after before : separator
+               local cross_rust_target="${cross_triples%%:*}"
+               # extracts last element after : separator
+               local cross_toolchain="${cross_triples##*:}"
+               use llvm_targets_${cross_llvm_target} || die "need 
llvm_targets_${cross_llvm_target} target enabled"
+               command -v ${cross_toolchain}-gcc > /dev/null 2>&1 || die "need 
${cross_toolchain} cross toolchain"
+
+               cat <<- _EOF_ >> "${S}"/config.toml
+                       [target.${cross_rust_target}]
+                       cc = "${cross_toolchain}-gcc"
+                       cxx = "${cross_toolchain}-g++"
+                       linker = "${cross_toolchain}-gcc"
+                       ar = "${cross_toolchain}-ar"
+               _EOF_
+               if use system-llvm; then
+                       cat <<- _EOF_ >> "${S}"/config.toml
+                               llvm-config = "$(get_llvm_prefix 
"${LLVM_MAX_SLOT}")/bin/llvm-config"
+                       _EOF_
+               fi
+
+               # append cross target to "normal" target list
+               # example 'target = ["powerpc64le-unknown-linux-gnu"]'
+               # becomes 'target = 
["powerpc64le-unknown-linux-gnu","aarch64-unknown-linux-gnu"]'
+
+               rust_targets="${rust_targets},\"${cross_rust_target}\""
+               sed -i "/^target = \[/ s#\[.*\]#\[${rust_targets}\]#" 
config.toml || die
+
+               ewarn
+               ewarn "Enabled ${cross_rust_target} rust target"
+               ewarn "Using ${cross_toolchain} cross toolchain"
+               ewarn
+               if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
+                       ewarn "'sys-devel/binutils[multitarget]' is not 
installed"
+                       ewarn "'strip' will be unable to strip cross libraries"
+                       ewarn "cross targets will be installed with full debug 
information"
+                       ewarn "enable 'multitarget' USE flag for binutils to be 
able to strip object files"
+                       ewarn
+                       ewarn "Alternatively llvm-strip can be used, it 
supports stripping any target"
+                       ewarn "define STRIP=\"llvm-strip\" to use it 
(experimental)"
+                       ewarn
+               fi
+       done
+       fi # I_KNOW_WHAT_I_AM_DOING_CROSS
+
+       einfo "Rust configured with the following settings:"
+       cat "${S}"/config.toml || die
+}
+
+src_compile() {
+       # we need \n IFS to have config.env with spaces loaded properly. #734018
+       (
+       IFS=$'\n'
+       env $(cat "${S}"/config.env) RUST_BACKTRACE=1\
+               "${EPYTHON}" ./x.py dist -vv --config="${S}"/config.toml 
-j$(makeopts_jobs) || die
+       )
+}
+
+src_test() {
+       # https://rustc-dev-guide.rust-lang.org/tests/intro.html
+
+       # those are basic and codegen tests.
+       local tests=(
+               codegen
+               codegen-units
+               compile-fail
+               incremental
+               mir-opt
+               pretty
+               run-make
+       )
+
+       # fails if llvm is not built with ALL targets.
+       # and known to fail with system llvm sometimes.
+       use system-llvm || tests+=( assembly )
+
+       # fragile/expensive/less important tests
+       # or tests that require extra builds
+       # TODO: instead of skipping, just make some nonfatal.
+       if [[ ${ERUST_RUN_EXTRA_TESTS:-no} != no ]]; then
+               tests+=(
+                       rustdoc
+                       rustdoc-js
+                       rustdoc-js-std
+                       rustdoc-ui
+                       run-make-fulldeps
+                       ui
+                       ui-fulldeps
+               )
+       fi
+
+       local i failed=()
+       einfo "rust_src_test: enabled tests ${tests[@]/#/src/test/}"
+       for i in "${tests[@]}"; do
+               local t="src/test/${i}"
+               einfo "rust_src_test: running ${t}"
+               if ! (
+                               IFS=$'\n'
+                               env $(cat "${S}"/config.env) RUST_BACKTRACE=1 \
+                               "${EPYTHON}" ./x.py test -vv 
--config="${S}"/config.toml \
+                               -j$(makeopts_jobs) --no-doc --no-fail-fast 
"${t}"
+                       )
+               then
+                               failed+=( "${t}" )
+                               eerror "rust_src_test: ${t} failed"
+               fi
+       done
+
+       if [[ ${#failed[@]} -ne 0 ]]; then
+               eerror "rust_src_test: failure summary: ${failed[@]}"
+               die "aborting due to test failures"
+       fi
+}
+
+src_install() {
+       # https://github.com/rust-lang/rust/issues/77721
+       # also 1.46.0-don-t-create-prefix-at-time-of-check.patch
+       dodir "/usr/lib/${PN}/${PV}"
+       (
+       IFS=$'\n'
+       env $(cat "${S}"/config.env) DESTDIR="${D}" \
+               "${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml || 
die
+       )
+
+       # bug #689562, #689160
+       rm -v "${ED}/usr/lib/${PN}/${PV}/etc/bash_completion.d/cargo" || die
+       rmdir -v "${ED}/usr/lib/${PN}/${PV}"/etc{/bash_completion.d,} || die
+       newbashcomp src/tools/cargo/src/etc/cargo.bashcomp.sh cargo
+
+       local symlinks=(
+               cargo
+               rustc
+               rustdoc
+               rust-gdb
+               rust-gdbgui
+               rust-lldb
+       )
+
+       use clippy && symlinks+=( clippy-driver cargo-clippy )
+       use miri && symlinks+=( miri cargo-miri )
+       use rls && symlinks+=( rls )
+       use rustfmt && symlinks+=( rustfmt cargo-fmt )
+
+       einfo "installing eselect-rust symlinks and paths: ${symlinks[@]}"
+       local i
+       for i in "${symlinks[@]}"; do
+               # we need realpath on /usr/bin/* symlink return 
version-appended binary path.
+               # so /usr/bin/rustc should point to 
/usr/lib/rust/<ver>/bin/rustc-<ver>
+               # need to fix eselect-rust to remove this hack.
+               local ver_i="${i}-${PV}"
+               if [[ -f "${ED}/usr/lib/${PN}/${PV}/bin/${i}" ]]; then
+                       einfo "Installing ${i} symlink"
+                       ln -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}" 
"${ED}/usr/lib/${PN}/${PV}/bin/${ver_i}" || die
+               else
+                       ewarn "${i} symlink requested, but source file not 
found"
+                       ewarn "please report this"
+               fi
+               dosym "../lib/${PN}/${PV}/bin/${ver_i}" "/usr/bin/${ver_i}"
+       done
+
+       # symlinks to switch components to active rust in eselect
+       dosym "${PV}/lib" "/usr/lib/${PN}/lib-${PV}"
+       dosym "${PV}/libexec" "/usr/lib/${PN}/libexec-${PV}"
+       dosym "${PV}/share/man" "/usr/lib/${PN}/man-${PV}"
+       dosym "rust/${PV}/lib/rustlib" "/usr/lib/rustlib-${PV}"
+       dosym "../../lib/${PN}/${PV}/share/doc/rust" "/usr/share/doc/${P}"
+
+       newenvd - "50${P}" <<-_EOF_
+               LDPATH="${EPREFIX}/usr/lib/rust/lib"
+               MANPATH="${EPREFIX}/usr/lib/rust/man"
+               $(use amd64 && usex elibc_musl 
'CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-C 
target-feature=-crt-static"' '')
+               $(use arm64 && usex elibc_musl 
'CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-C 
target-feature=-crt-static"' '')
+       _EOF_
+
+       rm -rf "${ED}/usr/lib/${PN}/${PV}"/*.old || die
+       rm -rf "${ED}/usr/lib/${PN}/${PV}/doc"/*.old || die
+
+       # note: eselect-rust adds EROOT to all paths below
+       cat <<-_EOF_ > "${T}/provider-${P}"
+               /usr/bin/cargo
+               /usr/bin/rustdoc
+               /usr/bin/rust-gdb
+               /usr/bin/rust-gdbgui
+               /usr/bin/rust-lldb
+               /usr/lib/rustlib
+               /usr/lib/rust/lib
+               /usr/lib/rust/libexec
+               /usr/lib/rust/man
+               /usr/share/doc/rust
+       _EOF_
+
+       if use clippy; then
+               echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
+               echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
+       fi
+       if use miri; then
+               echo /usr/bin/miri >> "${T}/provider-${P}"
+               echo /usr/bin/cargo-miri >> "${T}/provider-${P}"
+       fi
+       if use rls; then
+               echo /usr/bin/rls >> "${T}/provider-${P}"
+       fi
+       if use rustfmt; then
+               echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+               echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+       fi
+
+       insinto /etc/env.d/rust
+       doins "${T}/provider-${P}"
+}
+
+pkg_postinst() {
+       eselect rust update
+
+       if has_version sys-devel/gdb || has_version dev-util/lldb; then
+               elog "Rust installs a helper script for calling GDB and LLDB,"
+               elog "for your convenience it is installed under 
/usr/bin/rust-{gdb,lldb}-${PV}."
+       fi
+
+       if has_version app-editors/emacs; then
+               elog "install app-emacs/rust-mode to get emacs support for 
rust."
+       fi
+
+       if has_version app-editors/gvim || has_version app-editors/vim; then
+               elog "install app-vim/rust-vim to get vim support for rust."
+       fi
+}
+
+pkg_postrm() {
+       eselect rust cleanup
+}

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