[gentoo-commits] repo/gentoo:master commit in: dev-lang/rust/, dev-lang/rust/files/

["Georgy Yakovlev" <gyakovlev@gentoo.org>]

commit:     06c05b95a6ccc8456ba1a829d89a3834e781e96b
Author:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
AuthorDate: Thu Jun  1 23:06:15 2023 +0000
Commit:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
CommitDate: Fri Jun  2 03:00:55 2023 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=06c05b95

dev-lang/rust: add 1.70.0, add USE=lto

Use fat lto, instead of thin-local, as it provides more benefit at
expense of build time.
No bundled llvm lto for now, as it requires full clang/lld toolchain.

Signed-off-by: Georgy Yakovlev <gyakovlev <AT> gentoo.org>

 dev-lang/rust/Manifest                             |  34 +
 ....0-ignore-broken-and-non-applicable-tests.patch |  30 +
 dev-lang/rust/metadata.xml                         |   1 +
 dev-lang/rust/rust-1.70.0.ebuild                   | 745 +++++++++++++++++++++
 4 files changed, 810 insertions(+)

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index 391a1139b10f..87453c5ac92b 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -158,6 +158,38 @@ DIST rust-1.68.2-x86_64-unknown-linux-gnu.tar.xz 185953856 BLAKE2B 11fc1f284c772
 DIST rust-1.68.2-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 06f3d90126dfe5dcfb8147c8529f333bf635c5c669cc0b5d45156fed85e87aaaa67d8d9c4b250f77e1f0998e77e5635d3f3056447a032eac07bf847fc532a383 SHA512 1d826f0f8ed896d54139b4ae78205aee5cee3ce6f5449d94b8edb8fc19ab589bde6720eb1644502fc45fe0bd452e2e5209de83c99f7c4285a896cfaacbfdad36
 DIST rust-1.68.2-x86_64-unknown-linux-musl.tar.xz 270073164 BLAKE2B 7d69a578e1d4a8fa75cfea6e630265f1c73cca08ed86ddc7858e7770755431dbf13ddaadcf8035fc2b7d2d7b7144a08b3e3a9fa20afcb5cfed7a31d82098fe5e SHA512 b0294141f1e51176664ae841ea55991826ccd15d0d36b03471831baa202ecb97434bf96479e167772bd62f05b80b49878f89a065a91e00026f0aabe7c02fe552
 DIST rust-1.68.2-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 7de58f292729b349fe0694c724aa88ae5bec5a313952fbf7e62a361c7fba4cdedbd99238a4a826d7b627af30ddf4aca8646f6b061f44983a52dcf2ae8d52e56a SHA512 867e0c20049352fb696b99de9d0d8c5df8da0f1ea8eb9a0446884c2d741df7434bf83303694de208e75e64cd73664b979cf117d02db804bff9b4d6de8ee43638
+DIST rust-1.69.0-aarch64-unknown-linux-gnu.tar.xz 207128044 BLAKE2B 884ed5dab3b4f18e25eb1461178828f8945a4db81da212680134b834c1bbac300314f65f9a6310de1b980ec9deed20b5651369a835cc067e8450e65c373fcda8 SHA512 981ab5a7a221b381e766f09a3172e18eedddfeaec27814ef7e15cf5969b721c4191cfe1f734995f96e8ec5cd403be2e8824fa4b501926b58d42b71d11c0b56b4
+DIST rust-1.69.0-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 1bf54eb4df4f8fa28dc2afafd2ee50b72f0c235e817e31147cf3777d5e82f09b92d516e985ea9901ca8fdb233ea4fe6e231148bda858c83a8ead7f4e40719a0f SHA512 a26efbfc2cef15be20759e4cf2ad71a6eccc200ca8362cb8bddea0877e91ac82cc4f393111054d1fab161c1483ed0c054ca38c02ddc91fa8d986235459948e8b
+DIST rust-1.69.0-aarch64-unknown-linux-musl.tar.xz 189395128 BLAKE2B 333082be0e62375a8dacd9e1ebfbd754876950e0f3d31fc591dcc7476754463fa804aa8b6063d7649cd0ae280ac96b10e4ce5ba29a3c973f3e9b1f7528a998e8 SHA512 c5ee5bba97b48e1a5d313d88eed8df8f492b4a8b962b91516cb883af16d359150db6727f01dcc933d19e8bba0cb75a2015a09cb26d4d03afd54c13a52d454003
+DIST rust-1.69.0-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 8cf01b352a5d007922b65d01959ff1255eaa4b5957f97a8c83641fc77cc24a8820016da3bb73e1a8097737df639dc614f5609e64b9eca8c97991be5d08470b79 SHA512 f0ca993cd6516128e28b69eec0d924c2f6012cf7de4d3a83c4c85df0c04a4457667ac9b79e922222f67f269d81d1fcd04b2e960e1668e6dcf0efc765cbfa27ec
+DIST rust-1.69.0-arm-unknown-linux-gnueabi.tar.xz 171128532 BLAKE2B 1f07df78da360395f87998e9403253d903c3a236d7fb9213fb96f27c80e2b9bb3214473b077d4bed71f3d2dcc8630ed12b2c19938f2127f4cfd167b4c21ca334 SHA512 c8faf0a3145b26a5abf74dbd5875cb7cd440b9a992db70d1996f454ca8343c4f18d8cbb8e6560b3224de0a324ef813aab63b7e99abcfc0e80ed3844f994f0733
+DIST rust-1.69.0-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B 0addeaf1934fcdd92081204b28314b1ddac661e7ab147cdc023e88fa4560bf2e2ecda1fefd977afef759e32faca1abb022c6256634692ddd0e551b6a903fa2db SHA512 00e05ea2a89171ed66d2221177f8c140226583cf88fab6e4243403a845b899c8e86552bf49bee4083f0b4ec5091fea0f34281cae40aafa58bfc3c5b00e3e9907
+DIST rust-1.69.0-arm-unknown-linux-gnueabihf.tar.xz 171080940 BLAKE2B 3b38493b46b97d52c5b5fd71bec210f1cd6eae2a0d80dc87af17ea5cc47cae430caae3e59ecc25c39dc33f5f08c949025df3e96088f8e7bef70ea9ae4b154c24 SHA512 7292479f7e120f280a5b72013e848ec507baaec439a8418de66016632644aee5d4a8459b6c207de3b664b8fabc4457f94bafd6b9b5a87f2737cecb30f1fa5832
+DIST rust-1.69.0-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 96fb133bfea0c8d84df18b179731d967112ef7a8d741ef9f8cf6cdb6117ae101128b885b59b379c95d6d96687335e52b2a59e4c28ffb63a2db618d22847e7bfa SHA512 152d290b4915f11465557da8cd4850e4d744d8aa53df81b25d7da5eabad2d7738c9a3f3d1b0fa6ff7bacbd0fcb55dc4641c6b4edff52d2bfdb2f79eca59cdb68
+DIST rust-1.69.0-armv7-unknown-linux-gnueabihf.tar.xz 175695416 BLAKE2B 5c01d80e65b06ebd0625677e997590632afab0a7c5a96bbb91def50d107f307282ed92fd394de81de5ebe801fce583405199975566f801c75bf831d4b24a45d0 SHA512 d2d235adcc7e280dd14d2dbe01c718095f5c138246eca8e6df4e2ef5b74ec1add3300776c09d184047956a9163d24f9c5aae75d4ac611f57490684299cfa929a
+DIST rust-1.69.0-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B d939f3c29eb916c7e2c94776736d052ddead2e071e068ec94e180d4f5f922abbb165cf596574a3e3e2954d7cd79ecc20619f563ad9495cef0f9ee84fae2fbacc SHA512 13692854268ec690ac9307d118ef27d2e81693f1e33583e934e387ab2538a9b778e46d84f326aafe239272d7941489877a9cd43f31ccf37a294b0be466ea3498
+DIST rust-1.69.0-i686-unknown-linux-gnu.tar.xz 199132360 BLAKE2B 1e0b79d6883ef72335a41dad4a9811c27de1c9c926bbf3140c6201140f53d4d68c1ad5c8002b040b29c74d6454508cdf48cb583b0fa4317ab645d8945fba3f63 SHA512 345ad4da1443abc8fe160c40cbe42a02e6e1e93c8be7e09e8d025ade744d02ccb4a4d07379f27f8e70f694199359451b402cfdd37045c390e4f8013ff5b59228
+DIST rust-1.69.0-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 4371d5ff495bd9f9dad690a411ea1455fa4275b2324d6d8d0fc7a6c93baa44dc32448c122a4e8d6206ddf23e22e687614e94fac6ba8b4ca630328c02c8f7732c SHA512 7fc72cdc552e3c8474478352cd4ec450cab19660d5dd148680293f9ca6adf6ea370abcb707407c9975f9bd213cfd02fc2d32c1c11bf6a32c892e02d9ee6c246d
+DIST rust-1.69.0-mips-unknown-linux-gnu.tar.xz 151257112 BLAKE2B 098ec6973981845f7fa96a3a32051ceee0859abfdef3ce6d9486fb5c170ed194dca688013c8666c135db5f8d6ba468ec5e42db7d57265f0618909fa14c69adf1 SHA512 d5605d87cab05f499959f03c4bbb607c8e51d4c4e93f83bedd5ab7f8fd0fffd11cafc59f6b866bffd30f76ea37f5a69512491d46fbb613a82eadba63e17ce13f
+DIST rust-1.69.0-mips-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B f39075809e42bc83d2be8057095f4cb95bed16a63a9d10f898ba878852f2b4f25fb734a34510be506b0efafe39d450719d5f59a5f4c52bea6f6d5299993c0526 SHA512 ccf22fe8ee696b7402ec0afa9a5564d514ce423fc62220eb3429d366e5c526786d82919ce4740a9d0af61b1fccf457dc2bd4328d863820918614e8edd4c21c1c
+DIST rust-1.69.0-mips64-unknown-linux-gnuabi64.tar.xz 149208900 BLAKE2B e68ebbd8ed27384097d1a847a51e7f60c5ef353b21b1c595ac7398762699117f24d43bd8f968b4f8ce48da9646f818d4252e13dcb2c68dc8ad976318a65e033f SHA512 b26304ebaf78655cf5c7966473f9d65c2c969ce61109d3fcaa852ec09de11eedb144a55feaf19695387ff82aa604aeefc20ef59f315bde56bbaa66303432cb6b
+DIST rust-1.69.0-mips64-unknown-linux-gnuabi64.tar.xz.asc 801 BLAKE2B 219cdecb36deabaf099c09e665fb44f44dd16a49097f4bc101c9d5201f21e6f0ba91ee4751b8d336929d7a270cbf4d58ea48827f80a3c3c74003addfe2b2974e SHA512 aa866c1caac3b35ae1d3b846db7a92dc2c826de4b3671bf7cd3c0fb21f6aba68adfeee843fb351284c3cf816dfae8faef165b12f1821b2d63efd37c149b2eeed
+DIST rust-1.69.0-mipsel-unknown-linux-gnu.tar.xz 154656916 BLAKE2B d3c20130eecee206cca2c017f30e842b155cb4774129790347c6ae11276ff12dc31e6636a7c82e8064129d68bac275141c652a25234b157658d053162f28b4b9 SHA512 dad06c90b20d9f343a87dccfd9379c7fa8a914eccd77bb4e6f3a6f322e165db25001c13f78dee85055b7aea29b01f72f7cc1602a39ea911183ffd768c7e601da
+DIST rust-1.69.0-mipsel-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 4d5b46911d51b7fd1494318552b43bfe7448566fb0870229d90f0a237a863f3638a1b1b455c17016021f5b1d94acbe7ac048e71f7a1894cdd6b318431c64a6e2 SHA512 d089842013c4054c74929a4ad4d1cf6362b32e87a4bb5cf3613b260110d7fef69209605795d97484c8fd34287297ec70d6826d19693417cc9ac56b24079fc29b
+DIST rust-1.69.0-powerpc-unknown-linux-gnu.tar.xz 168723248 BLAKE2B b39871cac143d16565e777301ec17d41fc9887c7355c5c2b97c969c87910ece8531cb11ada056b6c94977ad3db81fb9304308065e07be570ecbcecd8529e64be SHA512 9211aa19c792ae12cfeb646a214761b3c2b012b33402a6b881b2d8bbf12a5da1f528b2b9adeeb42afcf18eb5161d430e9dd08ff96e3f048f5e6ae94a7abcdfbc
+DIST rust-1.69.0-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B e697fb9abb9f497214eca3d54550c6e11a713d70f996b5f2ab9fab0833b0d2c20ee5da1407f8b0a862c39f35e9eb85a731529c828ce1530954c29a33bd0ea215 SHA512 b2f1adafdc9632dc553d4c88d1eced2f73eef5ae76a3b051e4e338cb99b0a1ef1280dd2a8783c55d40688c05f4ebd2e77fc785a4e3827ae5f1a0f3734cffec64
+DIST rust-1.69.0-powerpc64-unknown-linux-gnu.tar.xz 168097900 BLAKE2B 1e476381ec036a23fae6a469471a31998461df22f4eefa3faefe286a6ffdc40aa29fdcb07702cf162261820e00161b95d3a4c04bcd23d843e70221d233237106 SHA512 5e9787f2c92373d044a99a23419ae8adbdd83beeec32f5403e2011b650e8a5020e16a9aecab21079dc1e4c906dca6ffc5c581e47a75e841df86f478b5c2e7d0a
+DIST rust-1.69.0-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 89928b51bfbbbdfa22cff5baa78a8b33d54f98c523302e12632d4180aca17f1c37ad5f57907422cad3ea5a5eb54e667478078a8af36511ad6657aa0fd5bd5e34 SHA512 bf08e394b3797baf388c4f9753e0a57e51f110e65128817b1e48ac066a4db3c60b9ea988b6af5c6ee7651656ff98a1785cb349ea4557a14cd40ef5071770fde8
+DIST rust-1.69.0-powerpc64le-unknown-linux-gnu.tar.xz 177527584 BLAKE2B 1c9efdc5098384b9f2b8ba44e3704bb380fee70a6653ef5dace2773c7083de60ec9814f43253db5febe43746e0ed054cecc30763f8a92ca70a4b4ce0d83ada64 SHA512 132c95339994171cc3ee71b844cd29c1ca4c2b9cb2e55d8d2b6dab0b43efabb6674b19b0298ee18fab2f6b137c2b4baa3574e3d5985a46f622f489222647499e
+DIST rust-1.69.0-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 209bf72584da1c9bd224ffd070562b72f4240ba802dbb9b3079f330767df90490c4dc808a87d04a31834123b6583ebb62faaecc082edfe2130643f2e577cc274 SHA512 1345173b8b52afa3584e5351a1f2996c823e202ec60d020e43bd0bc8078ba99251586c63e12e9874fa8cae8153fa50c111fe1f27f5d7f27f3df9e11bd2d794f7
+DIST rust-1.69.0-riscv64gc-unknown-linux-gnu.tar.xz 162502700 BLAKE2B 148788555052d5578837e63d9e3a78bb18e9b6e3928b7ec86664c278147f2429342244cc66422807290a61d3f0ed2291aba297dd74562db0b60db0b9f801959b SHA512 af4a7f8ed69aa9e75c457f5c808e3f465dcfa38c9f224f4962a309a1f6352aecd75a1a434d43f15a16382f54d99e7d162a496ab7ab89dd41ab0481f07e4c0546
+DIST rust-1.69.0-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B e02800b42cdee6d7e78fc5ace9f4b8d7f50b6c02aa1107ef1e025bbd1bf91a2dbc200b7f5198e8fffe3b1f81192acd3b8e8eb8af60c0603f03d449ec17c4d4d9 SHA512 79fb21ef8e1049cbdab2f148b8b5ad5f81f93ed338dd76a69ff457200c32acfaef1ddc76bb462e3317aea55aeefe1593073c637c26ced417767f86ffb311e6e1
+DIST rust-1.69.0-s390x-unknown-linux-gnu.tar.xz 192163756 BLAKE2B 9191b2276af1fd2872ae77f0a366b71a56efb4a7507d6a5c3fe301ed2a8165b417abf8a5c85f08b7e8a171318f9f27abb31a777e347f24e59272df95e1448959 SHA512 36fb7ea2b6bd61d0a05cf5dadbbfc4d623271baa3819ee3f6c91389e39da6c22c4a568eb78c4a3ab5e270bba163afd742d0d585f0d381c758709405c3292c5e9
+DIST rust-1.69.0-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 5191016cf56b106230791dafa2baaaa9ee9c40009b304831eb81ba5f536588eca43840c66e927f80f677780c15ac19278f710b12a5753e063af6257cc2c1fb6b SHA512 10625fa96fcdc2f19abace688a7c5f6aa8078959d52e7f1a635bb5624d32eb71ba055fa14d89f8724813385d52f7e55f307a9b1b76236c999c2b36634acc14cc
+DIST rust-1.69.0-x86_64-unknown-linux-gnu.tar.xz 152594196 BLAKE2B f46e89bb76033bddaf8dd96d6abc5ad45965c4235bd97bef9d827d528bb385348c11a8916e9443d888dea6d6637a7460d2d0b61d3b1d642e5d908d0551ee64c6 SHA512 6031403e7009d758074e76a0aa9d4d90c236799439832e0b6fe1e481afb20a330952d92a3627efa28029958ee36f2b93e123a0f4e1e446bca2f1ede2e4bfc621
+DIST rust-1.69.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B b12e73829cef5aed2f1fef7c51122d4f4db11622d53860013e3a396ea7a1bf945ce2142aed3d4720c89f0bda223d5fd8f1665da11be185faff949f45a4d65206 SHA512 79d5315ee87e2a02425671376d1a5ed0d947e85fd5bd5a09c6634ac4bc9baa31f1ae57380e3ed00f597f8594c67a319a86ed4f9bd34aafcca43aba388cd0ec39
+DIST rust-1.69.0-x86_64-unknown-linux-musl.tar.xz 227932404 BLAKE2B d28f150fe1adc4ca4dc6d7fe74396d24bff699fd010cd05f4bdbc2c0061e3b10b0b1c6ca1a87bba9de8f8e45c5af20a339f01e96982f3aa77f90f879a54b482c SHA512 8879f9031a98169880433c18f71ec08ea1770e59e27279b0d96dcf8aafa67594b2c50f322a5d9b5eb766d6b4da00c969111142e9d4ddd000daf4b3b2ac0b848a
+DIST rust-1.69.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B cd06fb7b95c997cb6ba84a662733a629397a93ba226daf3cb8e0ec3b76ca7a4ec2b264f3b6ea2960ebd4863db259ffaf0cb5ec90a579a910c8c77ea392238b7a SHA512 5f7741db315cf88965a372243a1d0111e5061cc23365980cb80adebc7ed40e5bd12ce981c1e0e9ea802d941f75a8bd917a89d793f49a35a2633c6f807758802e
 DIST rustc-1.65.0-src.tar.xz 139674928 BLAKE2B a218263fb67e306b153f5a6dae95b5ec653acaa5eb4b833862d6f0fd4685a8cec097dadc1b8a934e1bf6055672c7a617f9a0ad4a7dbf2e78084297f10b7ada04 SHA512 3d0369ed3028209c4ecb9b9e7b5f5e3a20be8cc05199675df4f091d62a96c0734bc1dbd7630928fe162792392ec6d0daf9ceed10771531ce022200c7b631e3be
 DIST rustc-1.65.0-src.tar.xz.asc 801 BLAKE2B 43ff92011cd6f7f34ce0495fa341379e5907d032ea90f91e533e5edaec6ad518aad50a9d8b2694074d6909ee96aa779403b16e95792e962e79c1b967542ae26f SHA512 75b9be53363022c81333117876cbcc573bbd4733edf767cbb164218644efb1a9c4bfc2aa73aaa1e39f248a84f1adacb1930a94a6e63f60093ff760fb9ae02efc
 DIST rustc-1.66.1-src.tar.xz 141692940 BLAKE2B 3fae45345998386fda1b11ec896fac4613b8e3f0092bc0df29c9685f4a4012c0bd1b600911c2d19bcfa8f5a84b8a3c39d4c9e062a62cd61925b59129e1cd72b9 SHA512 1944c024c603140d0a9236043a3bd1d0d211dd8d368d6d82a3a620f1ff43b29624755b0943f2b38b40a188c7eee77a840238ea757eaf435e2a3fa6a0e6b82832
@@ -170,3 +202,5 @@ DIST rustc-1.68.2-src.tar.xz 147835648 BLAKE2B 4b6deab818d915afe67a96f4d32a758c1
 DIST rustc-1.68.2-src.tar.xz.asc 801 BLAKE2B 6ac2444950e5f919d09823ea3eef50364ad7b295126b090178872970f03c43ca9747779e0873138ca3a0b753eff79d2ef36d8b70c6a6050039ba9f9018571016 SHA512 86ccbb8ea89f820ba92ad9cbfb8f4bda3393e2c24d699355fd559a2339ff39bcce2a027ebd1b043f11de24b00cdac8c42d252915b36e711eb1d80f49a8007d47
 DIST rustc-1.69.0-src.tar.xz 127242864 BLAKE2B 03f7f3784cb137bede0593dfc008347bb0bb25c982c058175ac2b0442c2593a5a7e2c4539c848ad4375d994c1b7900019120790f0fe12385b413eecc1647d70a SHA512 724398fc208ec18adbd8ba81a445e23d1001b746990f36b869126be8a45f1cdfa75f5b9cbdd0abbab506f91a56d3736ab247677699ebd69525245558cfc01a60
 DIST rustc-1.69.0-src.tar.xz.asc 801 BLAKE2B 2f9b95440c35403fe663f91531cc73681c1c5d5dcbaa10d53a36d542656c097eb4a4320fc12d8df228d5dfb57dd12eb9441c3bd0ba54b7d180e23ded3d2527bb SHA512 8f4c7e6e246a676f53d77b331fe5153eedbd3d8e9f6d922fecc78c8c6fdbbef4610308c93e5af6d8e0d744e6b3ce4bf01b39e29813475a50a38240f679c25156
+DIST rustc-1.70.0-src.tar.xz 140736896 BLAKE2B f07a800e35dca074df0c76fa91f512ae3ad2aacfd3cf9ba4a6c0fbb057e06b562bb03824c9417f4375965960e2e3cee5c2ba873e0de7aa0f68bd82b9e4dd2fb0 SHA512 21b35185fdcc35a059ee5ef6dca2b68f5f1d199e97f425a571cfc318a852c36a57bccf68e7673b4cb7cd83128f30d0b3eb93009a978f3ba3909b7eee50d40631
+DIST rustc-1.70.0-src.tar.xz.asc 801 BLAKE2B 172744ff679c4554a6992b08a6bdcd65bd133f3db2d7f2eb1fa3659683aeb65228f9c57d101d9d050256217bb4fbbc0ccaf892bfcd8ef69ac742e12e75548c68 SHA512 0b26b176bf957ea5c2465a8da05992907165f11dccfb8f3a8a2c851b20fc9083e8bca80fefee2534d3326e721f41d19ef75b7f49692a342ab7ef5cdb2e8c52a4

diff --git a/dev-lang/rust/files/1.70.0-ignore-broken-and-non-applicable-tests.patch b/dev-lang/rust/files/1.70.0-ignore-broken-and-non-applicable-tests.patch
new file mode 100644
index 000000000000..2e12c7820550
--- /dev/null
+++ b/dev-lang/rust/files/1.70.0-ignore-broken-and-non-applicable-tests.patch
@@ -0,0 +1,30 @@
+From 1879d1d1a284bf51c752e47db284ce22701ed5d0 Mon Sep 17 00:00:00 2001
+From: Samuel Holland <samuel@sholland.org>
+Date: Sun, 16 Sep 2018 16:38:48 +0000
+Subject: [PATCH 12/15] Ignore broken and non-applicable tests
+
+c-link-to-rust-va-list-fn: unstable feature, broken on aarch64, #56475
+env-funky-keys: can't handle LD_PRELOAD (e.g. sandbox)
+long-linker-command-lines: takes >10 minutes to run (but still passes)
+simd-intrinsic-generic-bitmask.rs: broken on BE, #59356
+sparc-struct-abi: no sparc target
+sysroot-crates-are-unstable: can't run rustc without RPATH
+---
+ test/ui/env-funky-keys.rs                                   | 1 +
+ 6 files changed, 10 insertions(+)
+
+diff --git a/tests/ui/env-funky-keys.rs b/tests/ui/env-funky-keys.rs
+index c5c824ac58d..f3fe047a79c 100644
+--- a/tests/ui/env-funky-keys.rs
++++ b/tests/ui/env-funky-keys.rs
+@@ -1,6 +1,7 @@
+ // run-pass
+ // Ignore this test on Android, because it segfaults there.
+ 
++// ignore-test
+ // ignore-android
+ // ignore-windows
+ // ignore-cloudabi no execve
+-- 
+2.24.1
+

diff --git a/dev-lang/rust/metadata.xml b/dev-lang/rust/metadata.xml
index e28f62701eb3..d67d2777f5ae 100644
--- a/dev-lang/rust/metadata.xml
+++ b/dev-lang/rust/metadata.xml
@@ -12,6 +12,7 @@
 	<use>
 		<flag name="clippy">Install clippy, Rust code linter</flag>
 		<flag name="dist">Install dist tarballs (used for bootstrapping)</flag>
+		<flag name="lto">Optimize the build using Link Time Optimization (LTO)</flag>
 		<flag name="miri">Install miri, an interpreter for Rust's mid-level intermediate representation (requires USE=nightly, sometimes is broken)</flag>
 		<flag name="nightly">Enable nightly (UNSTABLE) features (NOTE: it does not install nightly version, just enables features marked as nightly at time of release)</flag>
 		<flag name="parallel-compiler">Build a multi-threaded rustc (experimental, not tested by upstream)</flag>

diff --git a/dev-lang/rust/rust-1.70.0.ebuild b/dev-lang/rust/rust-1.70.0.ebuild
new file mode 100644
index 000000000000..8dcabc3e6394
--- /dev/null
+++ b/dev-lang/rust/rust-1.70.0.ebuild
@@ -0,0 +1,745 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{9..11} )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing \
+	multilib multilib-build python-any-r1 rust-toolchain toolchain-funcs verify-sig
+
+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 ~mips ~ppc ~ppc64 ~riscv ~sparc ~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/${SRC}
+	verify-sig? ( https://static.rust-lang.org/dist/${SRC}.asc )
+	!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 LoongArch Mips MSP430
+	NVPTX PowerPC RISCV Sparc SystemZ VE WebAssembly X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/(-)?}
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4 UoI-NCSA"
+
+IUSE="clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind +lto miri nightly parallel-compiler profiler rustfmt rust-analyzer rust-src system-bootstrap system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# List all the working slots in LLVM_VALID_SLOTS, newest first.
+LLVM_VALID_SLOTS=( 16 )
+LLVM_MAX_SLOT="${LLVM_VALID_SLOTS[0]}"
+
+# splitting usedeps needed to avoid CI/pkgcheck's UncheckableDep limitation
+# (-) usedep needed because we may build with older llvm without that target
+LLVM_DEPEND="|| ( "
+for _s in ${LLVM_VALID_SLOTS[@]}; do
+	LLVM_DEPEND+=" ( "
+	for _x in ${ALL_LLVM_TARGETS[@]}; do
+		LLVM_DEPEND+="
+			${_x}? ( sys-devel/llvm:${_s}[${_x}(-)] )
+			wasm? ( sys-devel/lld:${_s} )"
+	done
+	LLVM_DEPEND+=" )"
+done
+unset _s _x
+LLVM_DEPEND+=" )
+	<sys-devel/llvm-$(( LLVM_MAX_SLOT + 1 )):=
+"
+
+# to bootstrap we need at least exactly previous version, or same.
+# most of the time previous versions fail to bootstrap with newer
+# for example 1.47.x, requires at least 1.46.x, 1.47.x is ok,
+# but it fails to bootstrap with 1.48.x
+# https://github.com/rust-lang/rust/blob/${PV}/src/stage0.json
+RUST_DEP_PREV="$(ver_cut 1).$(($(ver_cut 2) - 1))*"
+RUST_DEP_CURR="$(ver_cut 1).$(ver_cut 2)*"
+BOOTSTRAP_DEPEND="||
+	(
+		=dev-lang/rust-"${RUST_DEP_PREV}"
+		=dev-lang/rust-bin-"${RUST_DEP_PREV}"
+		=dev-lang/rust-"${RUST_DEP_CURR}"
+		=dev-lang/rust-bin-"${RUST_DEP_CURR}"
+	)
+"
+
+BDEPEND="${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-3.13.4
+		dev-util/ninja
+	)
+	test? ( sys-devel/gdb )
+	verify-sig? ( sec-keys/openpgp-keys-rust )
+"
+
+DEPEND="
+	>=app-arch/xz-utils-5.2
+	net-misc/curl:=[http2,ssl]
+	sys-libs/zlib:=
+	dev-libs/openssl:0=
+	system-llvm? (
+		${LLVM_DEPEND}
+		llvm-libunwind? ( sys-libs/llvm-libunwind:= )
+	)
+	!system-llvm? (
+		!llvm-libunwind? (
+			elibc_musl? ( sys-libs/libunwind:= )
+		)
+	)
+"
+
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+	sys-apps/lsb-release
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+	miri? ( nightly )
+	parallel-compiler? ( nightly )
+	test? ( ${ALL_LLVM_TARGETS[*]} )
+	wasm? ( llvm_targets_WebAssembly )
+	x86? ( cpu_flags_x86_sse2 )
+"
+
+# we don't use cmake.eclass, but can get a warning
+CMAKE_WARN_UNUSED_CLI=no
+
+QA_FLAGS_IGNORED="
+	usr/lib/${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}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_PRESTRIPPED="
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/rust-llvm-dwp
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/self-contained/crtn.o
+"
+
+# An rmeta file is custom binary format that contains the metadata for the crate.
+# rmeta files do not support linking, since they do not contain compiled object files.
+# so we can safely silence the warning for this QA check.
+QA_EXECSTACK="usr/lib/${PN}/${PV}/lib/rustlib/*/lib*.rlib:lib.rmeta"
+
+# causes double bootstrap
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/rust.asc
+
+PATCHES=(
+	"${FILESDIR}"/1.70.0-ignore-broken-and-non-applicable-tests.patch
+	"${FILESDIR}"/1.62.1-musl-dynamic-linking.patch
+	"${FILESDIR}"/1.67.0-doc-wasm.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+toml_usex() {
+	usex "${1}" true false
+}
+
+bootstrap_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 ${rustc_version} to build"
+	fi
+}
+
+pre_build_checks() {
+	local M=8192
+	# multiply requirements by 1.3 if we are doing x86-multilib
+	if use amd64; then
+		M=$(( $(usex abi_x86_32 13 10) * ${M} / 10 ))
+	fi
+	M=$(( $(usex clippy 128 0) + ${M} ))
+	M=$(( $(usex miri 128 0) + ${M} ))
+	M=$(( $(usex rustfmt 256 0) + ${M} ))
+	# add 2G if we compile llvm and 256M per llvm_target
+	if ! use system-llvm; then
+		M=$(( 2048 + ${M} ))
+		local ltarget
+		for ltarget in ${ALL_LLVM_TARGETS[@]}; do
+			M=$(( $(usex ${ltarget} 256 0) + ${M} ))
+		done
+	fi
+	M=$(( $(usex wasm 256 0) + ${M} ))
+	M=$(( $(usex debug 2 1) * ${M} ))
+	eshopts_push -s extglob
+	if is-flagq '-g?(gdb)?([1-9])'; then
+		M=$(( 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_${EBUILD_PHASE}
+}
+
+llvm_check_deps() {
+	has_version -r "sys-devel/llvm:${LLVM_SLOT}[${LLVM_TARGET_USEDEPS// /,}]"
+}
+
+# Is LLVM being linked against libc++?
+is_libcxx_linked() {
+	local code='#include <ciso646>
+#if defined(_LIBCPP_VERSION)
+	HAVE_LIBCXX
+#endif
+'
+	local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - <<<"${code}") || return 1
+	[[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+pkg_pretend() {
+	pre_build_checks
+}
+
+pkg_setup() {
+	pre_build_checks
+	python-any-r1_pkg_setup
+
+	export LIBGIT2_NO_PKG_CONFIG=1 #749381
+
+	use system-bootstrap && bootstrap_rust_version_check
+
+	if use system-llvm; then
+		llvm_pkg_setup
+
+		local llvm_config="$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+		export LLVM_LINK_SHARED=1
+		export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" --libdir)"
+	fi
+}
+
+esetup_unwind_hack() {
+	# https://bugs.gentoo.org/870280
+	# this is a hack needed to bootstrap with libgcc_s linked tarball on llvm-libunwind system.
+	# it should trigger for internal bootstrap or system-bootstrap with rust-bin.
+	# the whole idea is for stage0 to bootstrap with fake libgcc_s.
+	# final stage will receive -L${T}/lib but not -lgcc_s args, producing clean compiler.
+	local fakelib="${T}/fakelib"
+	mkdir -p "${fakelib}" || die
+	# we need both symlinks, one for cargo runtime, other for linker.
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so.1" || die
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so" || die
+	export LD_LIBRARY_PATH="${fakelib}"
+	export RUSTFLAGS+=" -L${fakelib}"
+	# this is a literally magic variable that gets through cargo cache, without it some
+	# crates ignore RUSTFLAGS.
+	# this variable can not contain leading space.
+	export MAGIC_EXTRA_RUSTFLAGS+="${MAGIC_EXTRA_RUSTFLAGS:+ }-L${fakelib}"
+}
+
+src_prepare() {
+	if ! use system-bootstrap; then
+		has_version sys-devel/gcc || esetup_unwind_hack
+		local rust_stage0_root="${WORKDIR}"/rust-stage0
+		local rust_stage0="rust-${RUST_STAGE0_VERSION}-$(rust_abi)"
+
+		"${WORKDIR}/${rust_stage0}"/install.sh --disable-ldconfig \
+			--without=rust-docs-json-preview,rust-docs --destdir="${rust_stage0_root}" --prefix=/ || die
+	fi
+
+	default
+}
+
+src_configure() {
+	filter-flags '-flto*' # https://bugs.gentoo.org/862109 https://bugs.gentoo.org/866231
+
+	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_abi $(get_abi_CHOST ${v##*.}))\""
+	done
+	if use wasm; then
+		rust_targets+=",\"wasm32-unknown-unknown\""
+		if use system-llvm; then
+			# un-hardcode rust-lld linker for this target
+			# https://bugs.gentoo.org/715348
+			sed -i '/linker:/ s/rust-lld/wasm-ld/' compiler/rustc_target/src/spec/wasm_base.rs || die
+		fi
+	fi
+	rust_targets="${rust_targets#,}"
+
+	# cargo and rustdoc are mandatory and should always be included
+	local tools='"cargo","rustdoc"'
+	use clippy && tools+=',"clippy"'
+	use miri && tools+=',"miri"'
+	use profiler && tools+=',"rust-demangler"'
+	use rustfmt && tools+=',"rustfmt"'
+	use rust-analyzer && tools+=',"rust-analyzer"'
+	use rust-src && tools+=',"src"'
+
+	local rust_stage0_root
+	if use system-bootstrap; then
+		local printsysroot
+		printsysroot="$(rustc --print sysroot || die "Can't determine rust's sysroot")"
+		rust_stage0_root="${printsysroot}"
+	else
+		rust_stage0_root="${WORKDIR}"/rust-stage0
+	fi
+	# in case of prefix it will be already prefixed, as --print sysroot returns full path
+	[[ -d ${rust_stage0_root} ]] || die "${rust_stage0_root} is not a directory"
+
+	rust_target="$(rust_abi)"
+
+	local cm_btype="$(usex debug DEBUG RELEASE)"
+	cat <<- _EOF_ > "${S}"/config.toml
+		changelog-seen = 2
+		[llvm]
+		download-ci-llvm = false
+		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)
+		$(if is_libcxx_linked; then
+			# https://bugs.gentoo.org/732632
+			echo "use-libcxx = true"
+			echo "static-libstdcpp = false"
+		fi)
+		$(case "${rust_target}" in
+			i586-*-linux-*)
+				# https://github.com/rust-lang/rust/issues/93059
+				echo 'cflags = "-fcf-protection=none"'
+				echo 'cxxflags = "-fcf-protection=none"'
+				echo 'ldflags = "-fcf-protection=none"'
+				;;
+			*)
+				;;
+		esac)
+		enable-warnings = false
+		[llvm.build-config]
+		CMAKE_VERBOSE_MAKEFILE = "ON"
+		CMAKE_C_FLAGS_${cm_btype} = "${CFLAGS}"
+		CMAKE_CXX_FLAGS_${cm_btype} = "${CXXFLAGS}"
+		CMAKE_EXE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_MODULE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_SHARED_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_STATIC_LINKER_FLAGS_${cm_btype} = "${ARFLAGS}"
+		[build]
+		build-stage = 2
+		test-stage = 2
+		build = "${rust_target}"
+		host = ["${rust_target}"]
+		target = [${rust_targets}]
+		cargo = "${rust_stage0_root}/bin/cargo"
+		rustc = "${rust_stage0_root}/bin/rustc"
+		rustfmt = "${rust_stage0_root}/bin/rustfmt"
+		docs = $(toml_usex doc)
+		compiler-docs = false
+		submodules = false
+		python = "${EPYTHON}"
+		locked-deps = true
+		vendor = true
+		extended = true
+		tools = [${tools}]
+		verbose = 2
+		sanitizers = false
+		profiler = $(toml_usex profiler)
+		cargo-native-static = false
+		[install]
+		prefix = "${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)
+		debug-assertions-std = $(toml_usex debug)
+		debuginfo-level = $(usex debug 2 0)
+		debuginfo-level-rustc = $(usex debug 2 0)
+		debuginfo-level-std = $(usex debug 2 0)
+		debuginfo-level-tools = $(usex debug 2 0)
+		debuginfo-level-tests = 0
+		backtrace = true
+		incremental = false
+		default-linker = "$(tc-getCC)"
+		parallel-compiler = $(toml_usex parallel-compiler)
+		channel = "$(usex nightly nightly stable)"
+		description = "gentoo"
+		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))
+		# only deny warnings if doc+wasm are NOT requested, documenting stage0 wasm std fails without it
+		# https://github.com/rust-lang/rust/issues/74976
+		# https://github.com/rust-lang/rust/issues/76526
+		deny-warnings = $(usex wasm $(usex doc false true) true)
+		backtrace-on-ice = true
+		jemalloc = false
+		lto = "$(usex lto fat off)"
+		[dist]
+		src-tarball = false
+		compression-formats = ["xz"]
+		compression-profile = "balanced"
+	_EOF_
+
+	for v in $(multilib_get_enabled_abi_pairs); do
+		rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+		arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+		export CFLAGS_${rust_target//-/_}="${arch_cflags}"
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${rust_target}]
+			ar = "$(tc-getAR)"
+			cc = "$(tc-getCC)"
+			cxx = "$(tc-getCXX)"
+			linker = "$(tc-getCC)"
+			ranlib = "$(tc-getRANLIB)"
+			llvm-libunwind = "$(usex llvm-libunwind $(usex system-llvm system in-tree) no)"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		# by default librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
+		# but we patch it and set to false here as well
+		if use elibc_musl; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				crt-static = false
+			_EOF_
+		fi
+	done
+	if use wasm; then
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.wasm32-unknown-unknown]
+			linker = "$(usex system-llvm lld rust-lld)"
+			# wasm target does not have profiler_builtins https://bugs.gentoo.org/848483
+			profiler = false
+		_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.${cross_rust_target}]
+			ar = "${cross_toolchain}-ar"
+			cc = "${cross_toolchain}-gcc"
+			cxx = "${cross_toolchain}-g++"
+			linker = "${cross_toolchain}-gcc"
+			ranlib = "${cross_toolchain}-ranlib"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		if [[ "${cross_toolchain}" == *-musl* ]]; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				musl-root = "$(${cross_toolchain}-gcc -print-sysroot)/usr"
+			_EOF_
+		fi
+
+		# append cross target to "normal" target list
+		# example 'target = ["powerpc64le-unknown-linux-gnu"]'
+		# becomes 'target = ["powerpc64le-unknown-linux-gnu","aarch64-unknown-linux-gnu"]'
+
+		rust_targets="${rust_targets},\"${cross_rust_target}\""
+		sed -i "/^target = \[/ s#\[.*\]#\[${rust_targets}\]#" config.toml || die
+
+		ewarn
+		ewarn "Enabled ${cross_rust_target} rust target"
+		ewarn "Using ${cross_toolchain} cross toolchain"
+		ewarn
+		if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
+			ewarn "'sys-devel/binutils[multitarget]' is not installed"
+			ewarn "'strip' will be unable to strip cross libraries"
+			ewarn "cross targets will be installed with full debug information"
+			ewarn "enable 'multitarget' USE flag for binutils to be able to strip object files"
+			ewarn
+			ewarn "Alternatively llvm-strip can be used, it supports stripping any target"
+			ewarn "define STRIP=\"llvm-strip\" to use it (experimental)"
+			ewarn
+		fi
+	done
+	fi # I_KNOW_WHAT_I_AM_DOING_CROSS
+
+	einfo "Rust configured with the following flags:"
+	echo
+	echo RUSTFLAGS="\"${RUSTFLAGS}\""
+	echo RUSTFLAGS_BOOTSTRAP="\"${RUSTFLAGS_BOOTSTRAP}\""
+	echo RUSTFLAGS_NOT_BOOTSTRAP="\"${RUSTFLAGS_NOT_BOOTSTRAP}\""
+	echo MAGIC_EXTRA_RUSTFLAGS="\"${MAGIC_EXTRA_RUSTFLAGS}\""
+	env | grep "CARGO_TARGET_.*_RUSTFLAGS="
+	env | grep "CFLAGS_.*"
+	echo
+	einfo "config.toml contents:"
+	cat "${S}"/config.toml || die
+	echo
+}
+
+src_compile() {
+	RUST_BACKTRACE=1 "${EPYTHON}" ./x.py build -vv --config="${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 ${t}"
+		if ! RUST_BACKTRACE=1 "${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: ${failed[@]}"
+		die "aborting due to test failures"
+	fi
+}
+
+src_install() {
+	DESTDIR="${D}" "${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml -j$(makeopts_jobs) || die
+
+	# bug #689562, #689160
+	rm -v "${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 profiler && symlinks+=( rust-demangler )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+	use rust-analyzer && symlinks+=( rust-analyzer )
+
+	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="${EPREFIX}/usr/lib/rust/man"
+	_EOF_
+
+	rm -rf "${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-${P}"
+	fi
+	if use profiler; then
+		echo /usr/bin/rust-demangler >> "${T}/provider-${P}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+	fi
+	if use rust-analyzer; then
+		echo /usr/bin/rust-analyzer >> "${T}/provider-${P}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${P}"
+
+	if use dist; then
+		insinto "/usr/lib/${PN}/${PV}/dist"
+		doins -r "${S}/build/dist/."
+	fi
+}
+
+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
+}