From 3c033fa00935d37f7680f2febc1aa6953d1d8709 Mon Sep 17 00:00:00 2001
From: Matt Jolly <kangie@gentoo.org>
Date: Thu, 2 Oct 2025 19:41:12 +1000
Subject: [PATCH] dev-lang/rust: add 1.91.0

Signed-off-by: Matt Jolly <kangie@gentoo.org>
---
 dev-lang/rust-bin/Manifest                    |  29 +
 .../rust-bin-1.91.0_beta20250928.ebuild       | 320 +++++++
 dev-lang/rust-common/Manifest                 |   2 +
 .../rust-common-1.91.0_beta20250928.ebuild    |  73 ++
 dev-lang/rust/Manifest                        |   3 +
 dev-lang/rust/rust-1.91.0_beta20250928.ebuild | 837 ++++++++++++++++++
 dev-lang/rust/rust-9999.ebuild                |   4 +-
 eclass/rust.eclass                            |   3 +-
 sys-devel/rust-std/Manifest                   |   2 +
 .../rust-std-1.91.0_beta20250928.ebuild       | 182 ++++
 10 files changed, 1452 insertions(+), 3 deletions(-)
 create mode 100644 dev-lang/rust-bin/rust-bin-1.91.0_beta20250928.ebuild
 create mode 100644 dev-lang/rust-common/rust-common-1.91.0_beta20250928.ebuild
 create mode 100644 dev-lang/rust/rust-1.91.0_beta20250928.ebuild
 create mode 100644 sys-devel/rust-std/rust-std-1.91.0_beta20250928.ebuild

diff --git a/dev-lang/rust-bin/Manifest b/dev-lang/rust-bin/Manifest
index f49bc8c9a8210..0157bc3a9b813 100644
--- a/dev-lang/rust-bin/Manifest
+++ b/dev-lang/rust-bin/Manifest
@@ -657,6 +657,34 @@ DIST rust-1.90.0-x86_64-unknown-linux-gnu.tar.xz 202999512 BLAKE2B 2aeaca36f5211
 DIST rust-1.90.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B c4dcbac0cf9f470eba5a4cc21d32a4ae8814d2e259138935c3abc783ba13a4017ef6eb9902bc5609e0a9bceb0ee880927de17c7e22ff870a79e9844482e3e4ea SHA512 4b030294eb39d7a89756988edc24e8777e10227e41159bb835a16fca9253b60fea20b29bd2c2fa6bd8f3e77164de6aacd589162cb4a240a64cfb38f39c644036
 DIST rust-1.90.0-x86_64-unknown-linux-musl.tar.xz 294424352 BLAKE2B e07514b7542b5a2ec20ae08c2e6e55ea1570bcc827b2851c86a3582bd73f69c0b70b18053030033f74a6d3c472fc4cae431a7404b594a7b12a17c01afe8b96a7 SHA512 fffdfd588b20aa518f361f6e4f6c32844d377356d520f8bd1b9f8a7e062be5c2db5e736a2b93619b2d0f182f49eeeaa22075e4692c7683c0ecb4a231522d4cbd
 DIST rust-1.90.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 85238bc602c31a435de5f336a0646589259973fbe6c2d737fd6423b4e5721b2448222b6be5f2bb4fe309a60162a8ed66dbdad6dbd338dbddcab12586461965da SHA512 729042345408572f3134702150984182716728cb42df76d8b1f1dc986b579b3bf911a3c64230a61638d3b8d064e28cce3aa0afcbbcd719b49e02b4f3009721b0
+DIST rust-1.91.0_beta20250928-aarch64-unknown-linux-gnu.tar.xz 172095376 BLAKE2B 9d328275e10cfadbacc495682b09339307693574af9bbfc2b206c55847b0ea9e1843118cae255caafc05d87d49b167f9c1483481b96a169b860ac08fe1debbae SHA512 1fd287fb305309def4e5df8a4e009f6d50cb423d47f4bb51c5ba63dfd91c9d235d4bade9b50a7a775b81c922fad092cdca62e342b9f2a97b8161b078dff1a83c
+DIST rust-1.91.0_beta20250928-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 5c647795becfce97eb628fa5f03d6ed7919c97bd4605043d192b46e32c8c33255db68433a2615d17e5f26205d0e5c986cd95b34cdd83826bf6916b64c4b8b1c1 SHA512 9aa0f5fe204801b1ee413209068d9702196ae119e1d8bfb57a3d5b458cba8be371e370a9e57a254d23cc4ef61d89db7fd5ff1721e69d31d06ddc4faf76d72326
+DIST rust-1.91.0_beta20250928-aarch64-unknown-linux-musl.tar.xz 253053588 BLAKE2B 08fa0f52fbbbdf8a658e5f86062c3590977424af505f0edd32cc1477b6acfad5aea516b434a7f0af240591575f9ea58908f331c9e80fc53eab9fc92566c944da SHA512 2e1dd7cd752caea77d65ea2a2532365d06b4f3dde4fb667ca99e95f65cd9a9dbb01334cb68b538f702c3fc275fe97ccbe6f0e8fe7d6b3b2595a2fe325e49ac19
+DIST rust-1.91.0_beta20250928-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 18b462a6b075c0dcd2b675554f677319c70e1467222cc336bf2b6e1c8d58269407943e20f7f28b9365b0d8f0a491f9938dea636af580aa63a85cf8b1a8d7ce5d SHA512 707dadd60adb97a95e944a4b645380750e63957892f310eb0037edd3e99f3c4359c5f0353b9da0cc807384fc2addb83a9cceffe859d9469ace964e0e465ef0bb
+DIST rust-1.91.0_beta20250928-arm-unknown-linux-gnueabi.tar.xz 236628464 BLAKE2B fc6ee14abf174c02bb23f954fe7486e9834bf3a9ddf043c044d9f4f7e9d26c171b906ab901be4b773e0e751294e6123cc563f03f1519fe4e7a3c6b6d339cb89b SHA512 31f5c8c2e7b82538d17f3d0db4d32ee46321d4ef5044146846740039d3bdfc8c72c5b4ae5df43daeb0fb89c7dc6317e9053fd83eacb4fb47600204a8a5c7d3fc
+DIST rust-1.91.0_beta20250928-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B 94ab04b4da8615663658341183496321f9417b75fb3968a025a0add46ce15739821ebe41313d803622656bd9ce47012e11c18a1ac0aa6e50495a76f39d48a600 SHA512 ab5e7cf268f4df4ab77afbbc5624fd261bc5775a97d667fc93b7d3fdd976a43bc6d3d70653aae01ec44b2abcbcd14dc689cd99894f203696e1047bf1195b86aa
+DIST rust-1.91.0_beta20250928-arm-unknown-linux-gnueabihf.tar.xz 237170812 BLAKE2B d239947b16bf9330c3fec200db9dda8ae030842256bcb3d3ef95814c0786495e679cfc3a9eeda0a8d7be63fd3b38508773b42b8c35862e8738e01bdaff8c9815 SHA512 d77f57fc1e473977b5688c4a32ea8990a85d91a3ae06e98abed2cd940d974fc2b564e971f9e3c0e57ef97c4b8d25ceef560968a36f8b3d8759baa8b4fc038b30
+DIST rust-1.91.0_beta20250928-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 7cad77cd70c514cc7c128eb0780be1cd16311fe3215c14850c679d9aa3fbbea067f6acf9eed4ff53822386c0e2876009de4805aa7a9e89afc43434e7b15970b3 SHA512 e54e2dd1a34091d8da89c38e254f0e7eb0ab6c22c1530637fe41c033a76e2dae52f3b1b82d373c467812c79dea63331f6175009025d1d78b57a9ab9dffdb1992
+DIST rust-1.91.0_beta20250928-armv7-unknown-linux-gnueabihf.tar.xz 244114520 BLAKE2B 4f04f4018d00fa9dddd4e903ef1fc5c2a93696bbcefc79e441e2a0839123424394b63c460d1a81e00194b451fde20f03753f0885af597e09674f02ffdc28d777 SHA512 5f72078cd7dcad95f0d1d5493217e094c7199a440a7cf1fd982be3b57b8a94f5d7b69caa32f00c4c5160f358843fd8e0cd2df774c5aa958dcff61b5e61f78cfe
+DIST rust-1.91.0_beta20250928-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B b856d0298b55498e1dd9122c690437cd5f2d6e618ebc96f7ee6ffa015e038bca54ee34165744f8f4b7c0aaf87db95e0ff1750796e53f072276eb69ca0f371229 SHA512 6091c3cfd481e34f1abc334c26c3fc7e6976a58749fc4218111ba4ec9b4dfd262fec1ccfd8edc294b9b9f5c485015d16f5c827525dedbff6e362a59c92ecad0e
+DIST rust-1.91.0_beta20250928-i686-unknown-linux-gnu.tar.xz 273860868 BLAKE2B 5be2d6233503271a032f2d7a2eb6dd8906317e18dea0b47a88caf08efdc0d1410cc728be5fd5b71fbc9d7498e7a765fd23d4f16f3b9f573bce820d60d610c2bc SHA512 f609dd8d425a4bd52d3b3251b26e298df7c2ef70237d13e64dcb8a76d8e58f3bc95722325b8a9673346a233369cb0342acc7070251d431f79850f33ab9b2db42
+DIST rust-1.91.0_beta20250928-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B b4acda03e93a3e712fa57e7ab20fcc56f38cbf7e5eaf4da5e18091f7ab02a32cec8d03d30d002ad7bd12b03dde12c8368739891dd559be40fa0bf87f0045d492 SHA512 06cd861bbd1603cec784af313e2da2571b9918f8f234aeee8aa9a6e2276acb6c35fa15d8db0941fc501f799869dab49014ddc9b7a9c591b445001f160649ad3b
+DIST rust-1.91.0_beta20250928-loongarch64-unknown-linux-gnu.tar.xz 270049484 BLAKE2B 9499b1df9c2b7242a993a8d9090cb62304db0c34c5800e1deb3543dd5866821e58644e4ba074bfaea79c7dc06fcb08acf2858c47af61ec8d0b7bdea165a14e53 SHA512 fd785b373e4fdc8b43b47a0811fce7a84fc234f6669170bdcd2bc53f4dbfefbed532fb3af9681437698a5095bcb4207460610751f0c8d547e866ba1835a72d9b
+DIST rust-1.91.0_beta20250928-loongarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 81608c9851e03a5018cfff678f68f139500728b3763443c26964e6d4c344d1be5c310991e2a432b9f3864370872f0b9c62ba37f2c37a12dbe11feb4dd2643012 SHA512 8604dd3a3a85f94a2529d54715b8b263a6abbc19b7a6f58090b02712fe79a5e409ae4f972acfbe70fd573e39da3fece160188a90efb9c60c14c144d6e2ad9017
+DIST rust-1.91.0_beta20250928-powerpc-unknown-linux-gnu.tar.xz 262935108 BLAKE2B e8de89b16da5b9aa52a22cb77d3785e9ebccaf521ac443b9ed9a2985dfc362505ed29117eff5a9a74571a2e8a9332900fd930183dda94a721068cf28a81e7d97 SHA512 805f8311a4acfbaac019a4e1fd59545e0c30c76a26049332ab77e4af10f363b0af8e92fbf0ec7bda325f93bdabe3291d54a9ec448454d67bac85ad4557a11f71
+DIST rust-1.91.0_beta20250928-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 6b399ba4e1013a8cafbf3dd91702ac33a8cc14ccc7a03cdab8e187f42646b4abf2fb88c5436619511bed12ef97a9584241e5f5d4425ddd74a7e0a00e8ea17507 SHA512 333edc84f2484b8185b126da68b4f883086e3842b56c9cc385ffa642e112262cb273d9c829c74a03f0649a41c806540971536cc92ce49fd5a3aedaf6ef2a268e
+DIST rust-1.91.0_beta20250928-powerpc64-unknown-linux-gnu.tar.xz 261871320 BLAKE2B 47cce41a6ba2a233ecf1abcdeda799507f8195b57cbc686cfb467539b62960d220135a36c5b185835515d3d64f332489b39f5c05c21c4265183dd8425026a3b7 SHA512 f7a03f9deea8996a25663073b6f7035d9c8ef60f7528c139994bc14a1055d4fbf8d2a900d80bfdea7e1be0bd281e39fca4a863fc45f27ed23918247f79d6d45a
+DIST rust-1.91.0_beta20250928-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 10d1e3e88dfce122284992ba2d94f8dedd0e5b1979b0ec8ec90d09a615dcb2a05287e4069f8c13801c490ebc26de4f25d74cc63d91911ac6fd0b055952e3ef71 SHA512 e8eec3b36b6b1bec852786f5a4d7976461b81b093c63248dc4faa994e5c263f007cbabda59a898b9d097bd756856434f4e6afe0a94cf56281f4963f4ab781b57
+DIST rust-1.91.0_beta20250928-powerpc64le-unknown-linux-gnu.tar.xz 283662436 BLAKE2B 4990cc15f7085b1aa326004b2bb0e81c7501dfe99cc2816a1b1f051ac682dd3ae27c72f55da06062ec55a87a1cd13dac65dd27b438443fa22895359705d35e04 SHA512 4658cadfcc990088b0c42f85d9fe4051c7581c03b72e5d849558d74e1ae746e101e6243737f4b9686b3b501adf05da199b798323f163e9a6c3cb8b3f631706e3
+DIST rust-1.91.0_beta20250928-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B e694b6bbea80e15f5989ac6f6e85699d2b6f285bc7c60d2172e8c554c9d414f1871c9d0446d4063e34a0e0d4f376dc5a74c373520cc3ecb847acdd1aad2c992d SHA512 853030df7476125cf4b33129266018a2a4006dc31cc5707805a569b019381c7bd735f83a3478b259181cc5d5da1568e95c836f4f2df715b2bf669116d700e536
+DIST rust-1.91.0_beta20250928-riscv64gc-unknown-linux-gnu.tar.xz 259277484 BLAKE2B 302863ba3bc95950b117c747a74cabc5791cbdeffdb23b8703c1e5a4cf68d0d5cc22212d7669c8af0b8459272f4105004b7b1cb785ff37557d856a6e2c17b763 SHA512 aa510f0494b0d9512493ceab1c1552ae2e2cbecf6155c2ebe0c6ab20fd7b8581b720d4a6c720431ac2a3ff0493d83fb55f1cb46b3256c112ced9b6ba5f31ac1b
+DIST rust-1.91.0_beta20250928-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B b74230bc6956193e3b7016a1dd74c7263b1e3d271bdd6180ca87e5bb27ef1aa12149cff9666acd974f325cf630fb6b9a4faf4714e8424c6286e4987e508d4d01 SHA512 eafec3f4ddec5cb489a76a9c02ea2579885748e28807c5faddcd43411aef86475a3b53f998e64e2232800b25e004d27868de23c802499f7a0b50895f6c211486
+DIST rust-1.91.0_beta20250928-s390x-unknown-linux-gnu.tar.xz 247379756 BLAKE2B 4b62291f0645750b601c5b10f892d8c2ec30f223c9a9bbaf4f3d6498911da4c109e8020a9536c0a85b73afa80fe9eb40368d85ed453c3395fc64d0bafc1533c5 SHA512 078a94df9d2187af8635e73081387de551bcc2bad5d6b4449825b92b87a4a331822ee7029e5c27f7b5618fd839e920e6763c8bc267e49c7ff24bd73e1d5fe48d
+DIST rust-1.91.0_beta20250928-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 5c282c7f79c5396ae9e419468fd88bf094246c69678f2a6c6a65ff9cb73cb4c21190ed794dfb3ea0482c7986d515ba9f5d417354d5803e9fba473ca5b7837933 SHA512 37644c5cf4aad7430d048f36a8cac0a042f461757c89d59cda5f80a3eb84ff84eeab5efcbf806ca715036403299416dbf95f774642ef57888e95159db73cfbfb
+DIST rust-1.91.0_beta20250928-x86_64-unknown-linux-gnu.tar.xz 207672796 BLAKE2B 3a1530ecb26dd8b278fdf3541ae43ceeda5ab8f64d2df5a057c4d487c1d9886bea1798db74d8da6a3d4b5908b593173ba0a7c80ab66b685c98da634f587e54da SHA512 0650169048f5e2ba845b5fde0a061244dcc78bd3f50688429c096bb13b746199baea6428335fb352f2eb94206cfe288b0f47864b35e8b173ac24d0815e3d8d7e
+DIST rust-1.91.0_beta20250928-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 0cca15af7dd687338b4bf1c3466d3361516a9a3a75d0101a4b2668f3b9b3b7ab495138c6b93160f10f1362d4ef8392c05d0a32c793f817686abc6db9f3de07ed SHA512 7bfca67933a63fc2802c9b000a4d986d0b87d3f075fc5fa7ab71f3cc9994e0d8625c8d88c95c8a7ed328c4cdfb9fb959955d4988c097163e7abb336b4ce3d6c6
+DIST rust-1.91.0_beta20250928-x86_64-unknown-linux-musl.tar.xz 303415480 BLAKE2B a8bad917244cf6641d5ede5e41cefc262e7edb8cf6cb2498c63d2af1b93b08286c86cc0e39928c9061d6ae21e344d91a2f569f61a7464981929883f2ac21ee17 SHA512 676ad4f6ed23dc5152a0d19f522d36d65d70d6d43adf5ef6a622f77f69c2fd6074988a3b58405eafc06d6004eb56cf49638a23ac10db53adc18fd20ea3f3c3e0
+DIST rust-1.91.0_beta20250928-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B b54b7007ae859d6a096c9bb927d4cfef976874a426b74ece4f147a6914484fd21beb30cef71736ca38260d0d551cd00a45e936cce27fddf191b958770ac91f31 SHA512 3c796d3e4e0c13fafca3693e9a0c6ab3dc76fcb464b6157147ef5af05152c9d8620d89be5ca7a0a2815d74633fd40ff496ef602b4deb0d38d85bd07d8a497207
 DIST rust-src-1.74.1.tar.xz 2544036 BLAKE2B d95431b69f102782f51878ff73ce8802cac6dab7909497c3231d1c479b95dc2a618cc6efd8bac9c6bd59a2b10dc6be05199f1e1bd74e45cc640ee52352c29268 SHA512 11467d0936193c5a5be8c2eba1aefe2b7028af48494698863de2c4057d68ce33dcee1fc66dc2d68b1d32f0202ce49e9b906727849de8f8d904dd07930e76d5a4
 DIST rust-src-1.75.0.tar.xz 2570256 BLAKE2B 9db7ccff07ffe6991233e9f530321fd6ba48c561dcf1226537afa70c7d045421d8e83c5300b0866ec6fccfaae96dd67b9f204e9e0e12108c0c766d467cd78909 SHA512 e7565cea2f1658a05237a698e38880df2544319b41b6d8b0805db5f1f94fd3bb4f986967d0440fcdfe3a135e33246f3c747665b964f57ff5942f56133af78cdd
 DIST rust-src-1.76.0.tar.xz 2590884 BLAKE2B d1a6215dab34d7b10c3177d2b248f997d3a846388f3442567572880aa5c5bc51b56398f5d4dc32727cee7c9dbef494430d6534a76b66c4ae5ac4fed07266644d SHA512 39d2fe58fae8c8c5a6cb3fb1ef2a1c7548c018fef6ccea531659fdfecd68a4aa77125299d2cbe5b58e500337b4d074928318fa9ebce358af500d0ef27260e3ca
@@ -676,3 +704,4 @@ DIST rust-src-1.87.0.tar.xz 3119800 BLAKE2B 6429eb419f17109537a2a5463b0c68f504b3
 DIST rust-src-1.88.0.tar.xz 3155272 BLAKE2B bca923d2264337366b8013c45f3a40cbdfc1e1b746775161eaa66a1db653aa4ccb2a55980368ecf9808d6f4885194e2dfbf1f678d0500a43f7b2fcc0f79d27c8 SHA512 6dfe1fc3565927a9ac2ff9821ef3222cca170ff538833e1969ebe662af2cad5257c1ab3d82f5ca10aeaab40f54916a25dd96fd16449cd59e4d104b631911931b
 DIST rust-src-1.89.0.tar.xz 3461444 BLAKE2B b1e43def4cc0f47f0e776d383954b339a62b3efa77d5db71180b7b7620a67bd2d2714afe0b08ae26a06d7d8c785eed03f545d91813d074cbe6641e883a2d40dd SHA512 055c09854e47d1bdfc7f393ac6f2783d35cb8cf13100deb227598ad91020f1d91e4cec1658d8e71db3c266dc6e267ab4172dc1007428cb05105dc4aac57bf89d
 DIST rust-src-1.90.0.tar.xz 309 BLAKE2B c8de4eee314538dbe6c5d5c2057efe9b3f11303f33efd113276675c261fc8e777f0b6ed169d1ba3a071bf0f9c811a1268cc91dedcf257cb9005ecc84448a1379 SHA512 2b053a8416ce4d0e69838023cb3293a18d77e1b8be30d77992baa46f9f0eb9abbfc2c1b44cea48cc6aeed2ebed4bd2f40b325abc8d82f8cad10ab33f08700189
+DIST rust-src-1.91.0_beta20250928.tar.xz 3509016 BLAKE2B 81417db8497947d67288b1980601127cc9f737b8159e7817626fca7cb7d07fd4287fee14f0b4043c596a67d1d63b1ab9e273b6e1976f27049c86612395ee9255 SHA512 3ddd9987fac3d465b843cc05385ad482e9c18ff2c15dc2dc864fbb4988c2775766db5bec6fc35ed750ce5389d77dd9a56eafbbcb0ecdee293f5defd7e7a5ce45
diff --git a/dev-lang/rust-bin/rust-bin-1.91.0_beta20250928.ebuild b/dev-lang/rust-bin/rust-bin-1.91.0_beta20250928.ebuild
new file mode 100644
index 0000000000000..2e4fb28bc1bcb
--- /dev/null
+++ b/dev-lang/rust-bin/rust-bin-1.91.0_beta20250928.ebuild
@@ -0,0 +1,320 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+LLVM_COMPAT=( 20 )
+LLVM_OPTIONAL="yes"
+
+inherit edo llvm-r1 multilib prefix rust-toolchain verify-sig multilib-minimal optfeature
+
+if [[ ${PV} == *9999* ]]; then
+	# We need to fetch a tarball in src_unpack
+	PROPERTIES+=" live"
+elif [[ ${PV} == *beta* ]]; then
+	# curl -Ls static.rust-lang.org/dist/channel-rust-beta.toml | grep "xz_url.*rust-src"
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	RUST_TOOLCHAIN_BASEURL=https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/
+	SRC_URI="$(rust_all_arch_uris rust-beta rust-${PV})
+		rust-src? ( ${RUST_TOOLCHAIN_BASEURL%/}/rust-src-beta.tar.xz -> rust-src-${PV}.tar.xz )
+	"
+else
+	# curl -Ls static.rust-lang.org/dist/channel-rust-${PV}.toml | grep "xz_url.*rust-src"
+	SRC_URI="$(rust_all_arch_uris "rust-${PV}")
+		rust-src? ( ${RUST_TOOLCHAIN_BASEURL%/}/2025-09-18/rust-src-${PV}.tar.xz )
+		ppc64? ( elibc_musl? ( !big-endian? (
+			$(rust_arch_uri powerpc64le-unknown-linux-musl rust-${PV})
+		) ) )
+	"
+	KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~s390 ~x86" # ~ppc64 ~riscv ~sparc ~mips
+fi
+
+GENTOO_BIN_BASEURI="https://github.com/projg2/rust-bootstrap/releases/download/${PVR}" # omit trailing slash
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+if false; then #[[ ${PV} != *9999* && ${PV} != *beta* ]]; then
+	# Keep this separate to allow easy commenting out if not yet built
+	SRC_URI+=" sparc? ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-sparc64-unknown-linux-gnu.tar.xz ) "
+	SRC_URI+=" mips? (
+		abi_mips_o32? (
+			big-endian?  ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-mips-unknown-linux-gnu.tar.xz )
+			!big-endian? ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-mipsel-unknown-linux-gnu.tar.xz )
+		)
+		abi_mips_n64? (
+			big-endian?  ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-mips64-unknown-linux-gnuabi64.tar.xz )
+			!big-endian? ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-mips64el-unknown-linux-gnuabi64.tar.xz )
+		)
+	)"
+	SRC_URI+=" riscv? (
+		elibc_musl? ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-riscv64gc-unknown-linux-musl.tar.xz )
+	)"
+	SRC_URI+=" ppc64? ( elibc_musl? (
+		big-endian?  ( ${GENTOO_BIN_BASEURI}/rust-${PVR}-powerpc64-unknown-linux-musl.tar.xz )
+	) )"
+fi
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
+SLOT="${PV%%_*}" # Beta releases get to share the same SLOT as the eventual stable
+IUSE="big-endian clippy cpu_flags_x86_sse2 doc prefix rust-analyzer rust-src rustfmt"
+
+# net-misc/curl is needed for our own bootstrapped rustc, since cross-compiling bundled curl is not supported
+RDEPEND="
+	>=app-eselect/eselect-rust-20190311
+	dev-libs/openssl
+	net-misc/curl
+	sys-apps/lsb-release
+	|| (
+		llvm-runtimes/libgcc
+		sys-devel/gcc:*
+	)
+	!dev-lang/rust:stable
+	!dev-lang/rust-bin:stable
+"
+BDEPEND="
+	prefix? ( dev-util/patchelf )
+	verify-sig? ( sec-keys/openpgp-keys-rust )
+"
+[[ ${PV} == *9999* ]] && BDEPEND+=" net-misc/curl"
+
+REQUIRED_USE="x86? ( cpu_flags_x86_sse2 )"
+
+# stripping rust may break it (at least on x86_64)
+# https://github.com/rust-lang/rust/issues/112286
+RESTRICT="strip"
+
+QA_PREBUILT="
+	opt/rust-bin-${SLOT}/bin/.*
+	opt/rust-bin-${SLOT}/lib/.*.so*
+	opt/rust-bin-${SLOT}/libexec/.*
+	opt/rust-bin-${SLOT}/lib/rustlib/.*/bin/.*
+	opt/rust-bin-${SLOT}/lib/rustlib/.*/lib/.*
+"
+
+# 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="opt/${PN}-${SLOT}/lib/rustlib/*/lib*.rlib:lib.rmeta"
+
+VERIFY_SIG_OPENPGP_KEY_PATH="/usr/share/openpgp-keys/rust.asc"
+
+src_unpack() {
+	if [[ ${PV} == *9999* ]]; then
+		# We need to fetch the latest nightly listing and get the apprapriate src_uri for our arch
+		local rust_bin_url rustc_src_url
+		# Cut down on webrequests by fetching the nightly toml once
+		curl -Ls static.rust-lang.org/dist/channel-rust-nightly.toml > "${WORKDIR}/channel-rust-nightly.toml" ||
+			die "Failed to fetch nightly revision info"
+		rustc_src_url=$(grep 'xz_url.*rust-src' "${WORKDIR}/channel-rust-nightly.toml" | cut -d '"' -f 2)
+		rust_bin_url=$(grep "xz_url.*rust-nightly-$(rust_abi)" "${WORKDIR}/channel-rust-nightly.toml" | cut -d '"' -f 2)
+		einfo "Using nightly Rust from: ${rust_bin_url}"
+
+		if use rust-src; then
+			einfo "Using nightly Rust-src from: ${rustc_src_url}"
+			# We need to fetch the rust-src tarball
+			einfo "Fetching nightly rust-src tarball ..."
+			curl --progress-bar -L "${rustc_src_url}" -o "${WORKDIR}/rust-src-${PV}.tar.xz" ||
+				die "Failed to fetch nightly rust-src tarball."
+			# no verify-sig here, just unpack it
+			tar -xf "${WORKDIR}/rust-src-${PV}.tar.xz" || die "Failed to unpack nightly rust-src tarball"
+		fi
+
+		einfo "Fetching nightly Rust tarball ..."
+		curl --progress-bar -L "${rust_bin_url}" -O || die "Failed to fetch nightly tarball"
+		if use verify-sig; then
+			einfo "Fetching nightly signature ..."
+			curl --progress-bar -L "${rust_bin_url}.asc" -O || die "Failed to fetch nightly signature"
+			verify-sig_verify_detached "${WORKDIR}/rust-nightly-$(rust_abi).tar.xz" \
+				"${WORKDIR}/rust-nightly-$(rust_abi).tar.xz.asc"
+		fi
+		tar -xf "${WORKDIR}/rust-nightly-$(rust_abi).tar.xz" || die "Failed to unpack nightly tarball"
+	else
+		# sadly rust-src tarball does not have corresponding .asc file
+		# so do partial verification
+		if use verify-sig; then
+			for f in ${A}; do
+				if [[ -f ${DISTDIR}/${f}.asc ]]; then
+					verify-sig_verify_detached "${DISTDIR}/${f}" "${DISTDIR}/${f}.asc"
+				fi
+			done
+		fi
+
+		default_src_unpack
+
+	fi
+	case ${PV} in
+		*9999*)
+			mv "${WORKDIR}/rust-nightly-$(rust_abi)" "${S}" || die
+			;;
+		*beta*)
+			mv "${WORKDIR}/rust-beta-$(rust_abi)" "${S}" || die
+			;;
+		*)
+			mv "${WORKDIR}/rust-${PV}-$(rust_abi)" "${S}" || die
+			;;
+	esac
+}
+
+patchelf_for_bin() {
+	local filetype=$(file -b ${1})
+	if [[ ${filetype} == *ELF*interpreter* ]]; then
+		einfo "${1}'s interpreter changed"
+		patchelf ${1} --set-interpreter ${2} || die
+	elif [[ ${filetype} == *script* ]]; then
+		hprefixify ${1}
+	fi
+}
+
+rust_native_abi_install() {
+	pushd "${S}" >/dev/null || die
+	local std="$(grep 'std' ./components || die "std not found in components")"
+	local components=( "rustc" "cargo" "${std}" )
+	use doc && components+=( "rust-docs" )
+	use clippy && components+=( "clippy-preview" )
+	use rustfmt && components+=( "rustfmt-preview" )
+	if use rust-analyzer; then
+		local analysis="$(grep 'analysis' ./components || die "analysis not found in components")"
+		components+=( "rust-analyzer-preview" "${analysis}" )
+	fi
+	# Rust component 'rust-src' is extracted from separate archive
+	if use rust-src; then
+		einfo "Combining rust and rust-src installers"
+		case ${PV} in
+			*9999*)
+				mv -v "${WORKDIR}/rust-src-nightly/rust-src" "${S}" || die
+				;;
+			*beta*)
+				mv -v "${WORKDIR}/rust-src-beta/rust-src" "${S}" || die
+				;;
+			*)
+				mv -v "${WORKDIR}/rust-src-${PV}/rust-src" "${S}" || die
+				;;
+		esac
+		echo rust-src >> ./components || die
+		components+=( "rust-src" )
+	fi
+	edo ./install.sh \
+		--components="$(IFS=,; echo "${components[*]}")" \
+		--disable-verify \
+		--prefix="${ED}/opt/rust-bin-${SLOT}" \
+		--mandir="${ED}/opt/rust-bin-${SLOT}/man" \
+		--disable-ldconfig
+
+	docompress /opt/${P}/man/
+
+	if use prefix; then
+		local interpreter=$(patchelf --print-interpreter "${EPREFIX}"/bin/bash)
+		ebegin "Changing interpreter to ${interpreter} for Gentoo prefix at ${ED}/opt/rust-bin-${SLOT}/bin"
+		find "${ED}/opt/rust-bin-${SLOT}/bin" -type f -print0 | \
+			while IFS=  read -r -d '' filename; do
+				patchelf_for_bin ${filename} ${interpreter} \; || die
+			done
+		eend $?
+	fi
+
+	local symlinks=(
+		cargo
+		rustc
+		rustdoc
+		rust-gdb
+		rust-gdbgui
+		rust-lldb
+	)
+
+	use clippy && symlinks+=( clippy-driver cargo-clippy )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+	use rust-analyzer && symlinks+=( rust-analyzer )
+
+	einfo "installing eselect-rust symlinks and paths"
+	local i
+	for i in "${symlinks[@]}"; do
+		# we need realpath on /usr/bin/* symlink return version-appended binary path.
+		# so /usr/bin/rustc should point to /opt/rust-bin-<ver>/bin/rustc-<ver>
+		local ver_i="${i}-bin-${SLOT}"
+		ln -v "${ED}/opt/rust-bin-${SLOT}/bin/${i}" "${ED}/opt/rust-bin-${SLOT}/bin/${ver_i}" || die
+		dosym -r "/opt/rust-bin-${SLOT}/bin/${ver_i}" "/usr/bin/${ver_i}"
+	done
+
+	# symlinks to switch components to active rust in eselect
+	dosym -r "/opt/rust-bin-${SLOT}/lib" "/usr/lib/rust/lib-bin-${SLOT}"
+	dosym -r "/opt/rust-bin-${SLOT}/man" "/usr/lib/rust/man-bin-${SLOT}"
+	dosym -r "/opt/rust-bin-${SLOT}/lib/rustlib" "/usr/lib/rustlib-bin-${SLOT}"
+	dosym -r "/opt/rust-bin-${SLOT}/share/doc/rust" "/usr/share/doc/rust-bin-${SLOT}"
+
+	# make all capital underscored variable
+	local CARGO_TRIPLET="$(rust_abi)"
+	CARGO_TRIPLET="${CARGO_TRIPLET//-/_}"
+	CARGO_TRIPLET="${CARGO_TRIPLET^^}"
+	cat <<-_EOF_ > "${T}/50${P}"
+		MANPATH="${EPREFIX}/usr/lib/rust/man-bin-${SLOT}"
+	$(usev elibc_musl "CARGO_TARGET_${CARGO_TRIPLET}_RUSTFLAGS=\"-C target-feature=-crt-static\"")
+	_EOF_
+	doenvd "${T}/50${P}"
+
+	# note: eselect-rust adds EROOT to all paths below
+	cat <<-_EOF_ > "${T}/provider-${PN}-${SLOT}"
+	/usr/bin/cargo
+	/usr/bin/rustdoc
+	/usr/bin/rust-gdb
+	/usr/bin/rust-gdbgui
+	/usr/bin/rust-lldb
+	/usr/lib/rustlib
+	/usr/lib/rust/lib
+	/usr/lib/rust/man
+	/usr/share/doc/rust
+	_EOF_
+
+	if use clippy; then
+		echo /usr/bin/clippy-driver >> "${T}/provider-${PN}-${SLOT}"
+		echo /usr/bin/cargo-clippy >> "${T}/provider-${PN}-${SLOT}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${PN}-${SLOT}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${PN}-${SLOT}"
+	fi
+	if use rust-analyzer; then
+		echo /usr/bin/rust-analyzer >> "${T}/provider-${PN}-${SLOT}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${PN}-${SLOT}"
+	popd >/dev/null || die
+}
+
+multilib_src_install() {
+	if multilib_is_native_abi; then
+		rust_native_abi_install
+	else
+		local rust_target
+		rust_target="$(rust_abi $(get_abi_CHOST ${v##*.}))"
+		dodir "/opt/${P}/lib/rustlib"
+		cp -vr "${WORKDIR}/rust-${PV}-${rust_target}/rust-std-${rust_target}/lib/rustlib/${rust_target}"\
+			"${ED}/opt/${P}/lib/rustlib" || die
+	fi
+
+	# BUG: installs x86_64 binary on other arches
+	rm -f "${ED}/opt/${P}/lib/rustlib/"*/bin/rust-llvm-dwp || die
+}
+
+pkg_postinst() {
+	eselect rust update
+
+	if has_version dev-debug/gdb || has_version llvm-core/lldb; then
+		elog "Rust installs helper scripts for calling GDB and LLDB,"
+		elog "for convenience they are installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+	fi
+
+	if has_version app-editors/emacs; then
+		optfeature "emacs support for rust" app-emacs/rust-mode
+	fi
+
+	if has_version app-editors/gvim || has_version app-editors/vim; then
+		optfeature "vim support for rust" app-vim/rust-vim
+	fi
+}
+
+pkg_postrm() {
+	eselect rust cleanup
+}
diff --git a/dev-lang/rust-common/Manifest b/dev-lang/rust-common/Manifest
index e48a786027062..c92a7caa4ec66 100644
--- a/dev-lang/rust-common/Manifest
+++ b/dev-lang/rust-common/Manifest
@@ -18,3 +18,5 @@ DIST rustc-1.89.0-src.tar.xz 267487572 BLAKE2B 9f6e3c595f843c239b57f14e26685e985
 DIST rustc-1.89.0-src.tar.xz.asc 801 BLAKE2B cd94da916d3646048d8f90c6de658de2981d0c815a1f8da01fe58ab6ec133e47180c8b506a41e22c68b3cb77aff5bd3bfc966a71ae2b73849918096d68764386 SHA512 006b91bf41fbedf91c39b8a6e483b089f69af7e78026f2903928fed64e44ee6aa53e46fd19bae31b1576b53a80dab66bf3e53a3bf79f820066d36285d706b90c
 DIST rustc-1.90.0-src.tar.xz 272348992 BLAKE2B 82dbbe3b5fe79f623c74fb81a4c4372b14e7d765f0e9af3d76a6c4bde9899007c85c8af70dfd9facc06c37a9c8d03a4597ec87b2d053585ccbc2287332b27e70 SHA512 fb0798b4c7450754db2fcbb641202909d209c6db2d9181d7df7282217b8320dc52f5e9853de9d7bdb79177f1f920389450cab07674dea5fb5501eaab5816662a
 DIST rustc-1.90.0-src.tar.xz.asc 801 BLAKE2B 1e84c6134c4fedbbd52610c259c1bdacb45bc97e8cce7a6b5a8c92827a072c88fcf8984893a5e6aa28c2d5d82bd849bb9d38390c783cfaa503a18c99bcaabcde SHA512 fc8f6dfbb4b50777ae8e499883f95b64861db0ca37119b34b3670b4adf51dd248b0b33daafee90e0f22f66b1d8bd8ae6a6107106e95e73f5c2c5a8dc29532e2e
+DIST rustc-1.91.0_beta20250928-src.tar.xz 284030160 BLAKE2B f5df2137e3a08b51f034543d1bcd0793f7d29264e81926458f6071c6f2de4093170ec5d257e56a9940b10494642eab9e57bffd24d61e8682ff052bd62517543b SHA512 e2ea6676f01b35cbd632c7a36d53b8d6d1e02a74fa460243575036b99406781416629300fef58ae04dffa8ed40f5448ca167654fb14db6676d57fc6cc2b31481
+DIST rustc-1.91.0_beta20250928-src.tar.xz.asc 801 BLAKE2B 70c58b0eb97b735835c37060e2e1ed13ed3531355cf36006c33ba5dbed2f252bda6900e4846693146fd8a093dd3b523a653166588ed1335fb22736e2e5a46567 SHA512 07eed611a38290582329512667d88cfb22d30119d9947169337844534bdbe9113f048080fbfa4dce95e3132319053919c6b11254c6e259cdaed788fa5ac777df
diff --git a/dev-lang/rust-common/rust-common-1.91.0_beta20250928.ebuild b/dev-lang/rust-common/rust-common-1.91.0_beta20250928.ebuild
new file mode 100644
index 0000000000000..26c4792d0fb57
--- /dev/null
+++ b/dev-lang/rust-common/rust-common-1.91.0_beta20250928.ebuild
@@ -0,0 +1,73 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
+inherit shell-completion verify-sig
+
+DESCRIPTION="Common files shared between multiple slots of Rust"
+HOMEPAGE="https://www.rust-lang.org/"
+
+if [[ ${PV} = *9999* ]]; then
+	inherit git-r3
+	# In case cargo is not in sync we'll fetch it as a submodule
+	# Nightly users will probably already have the repo cloned and up-to-date anyway.
+	EGIT_REPO_URI="https://github.com/rust-lang/rust.git"
+	EGIT_SUBMODULES=( "-*" "src/tools/cargo" )
+elif [[ ${PV} == *beta* ]]; then
+	# Identify the snapshot date of the beta release:
+	# curl -Ls static.rust-lang.org/dist/channel-rust-beta.toml | grep beta-src.tar.xz
+	MY_PV=beta
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	SRC_URI="https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz
+		verify-sig? ( https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz.asc
+			-> rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/rustc-${MY_PV}-src"
+else
+	MY_PV=${PV}
+	SRC_URI="https://static.rust-lang.org/dist/rustc-${PV}-src.tar.xz
+		verify-sig? ( https://static.rust-lang.org/dist/rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/rustc-${MY_PV}-src"
+	KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
+SLOT="0"
+
+# Legacy non-slotted versions bash completions will collide.
+RDEPEND="
+	!dev-lang/rust:stable
+	!dev-lang/rust-bin:stable
+"
+BDEPEND="verify-sig? ( sec-keys/openpgp-keys-rust )"
+
+src_unpack() {
+	if [[ ${PV} == *9999* ]]; then
+		git-r3_src_unpack
+	else
+		if use verify-sig ; then
+			verify-sig_verify_detached "${DISTDIR}"/rustc-${PV}-src.tar.xz "${DISTDIR}"/rustc-${PV}-src.tar.xz.asc
+		fi
+
+		# Avoid unpacking the whole tarball which would need check-reqs
+		tar -xf "${DISTDIR}"/rustc-${PV}-src.tar.xz \
+			"rustc-${MY_PV}-src/src/tools/cargo/src/etc/"{_cargo,cargo.bashcomp.sh} || die
+	fi
+}
+
+src_configure() {
+	:
+}
+
+src_compile() {
+	:
+}
+
+src_install() {
+	newbashcomp src/tools/cargo/src/etc/cargo.bashcomp.sh cargo
+	dozshcomp src/tools/cargo/src/etc/_cargo
+}
diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index c60b316e84600..c6cd7343ff12e 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -17,6 +17,7 @@ DIST rust-patches-1.87.0-r1-1.tar.bz2 5116 BLAKE2B 783ad21464a7e393d0aee506119be
 DIST rust-patches-1.88.0.tar.bz2 4062 BLAKE2B 64168ffa608f2edf2e0b3d079152c3b5dd59d0cea29078894f286bf91488e2e7769c55ede2d43769368d2147b46699d1bf981190d6800dc3d41c736289122eaf SHA512 b565acfb4d1146e52b1fb66b4a242927407cc34f1b38c2a100135cbbde24c8374af1997bc22069cca25f33cc8d747e56391f3d98a2d4e13dc0abcec0d6f88b0b
 DIST rust-patches-1.89.0.tar.bz2 4091 BLAKE2B 0fea3488a39d2b00627084f6b192dfbd7ed49bdceabbb1141d1a849ba053f786e31115e00365679b1b6fb5b0ccdf5dc0dc0803057cbffbcf0ae3d75ae9830d94 SHA512 de6c9b693bdd719d06605b5da730ee5d9cf9a1d88d58194a0ba48bd378a951c66723f561e39181222d28abb38e974a2921e14ea1f40156caf7b903778cf65790
 DIST rust-patches-1.90.0.tar.bz2 4183 BLAKE2B e6cc7516bd386c020be208e9931221edb301a94b6b5cf8140d68ddd5e13b1ddaaa53b52b4b7b039faf2a7caf44107f170afb01e15ac7487c6fe5146feff3789b SHA512 0cbf6dd9fc8b68e265dd146423c82c72bccf1ef7f81c5bab87c5d53dda1ecce80ffad361f2c276ab713616847126c277af7b1e48327d433f6202361e25cf5201
+DIST rust-patches-1.91.0_beta20250928.tar.bz2 4214 BLAKE2B aad78f10a875ead5dc3570c7c276a219a8897cbc649cc593fc37d1a99cccdd6fdcba962887fca0417e40fdda6b1918ecec88795619b1df66e96926779e84b2c8 SHA512 366ad9eb680d122295e711a43049ea5fe7328d6f9f2a7d43eda92897deb35297305ef10a1f4a323d15548ce6264c1ac25d5021f5718cf73208ffec93126d02b3
 DIST rustc-1.74.1-src.tar.xz 155968724 BLAKE2B e05f2379ac94b286f85791a138e1928e5b5b5a7749f0981d82c40c2a12860f55bf96bb2f0e924e35a0f8b2447b13052d38adea909aaa3199105787bb5a4861b3 SHA512 14c7e7ed2f38ab60299d8c7d41d78f042b6b57ef822d577b5138e60bdde31cf141eccd4332a25bc5da3d58eb5313d63c1448b5dfe9e11b8055bb8ea133a9038d
 DIST rustc-1.74.1-src.tar.xz.asc 801 BLAKE2B ddf73175b164233babf31ca3a381b03e20c0f36d017c1d5f85d6ab11f0986d861ab23b11c061e6b2444ced70c3d6a494cc3de4ec86f0deb221a805491bd75420 SHA512 9a96ff9ba9a4e2af4e267b2ec126fc0675c78d0eb767703daa2f28491c3d85c2ab00fbd8584390bf658812ec6c4ab6c57e43b386db59fd505bd3134a8873a09e
 DIST rustc-1.75.0-src.tar.xz 159624388 BLAKE2B 8937b80585eddaa3e1f1ef948899d14a170308518c6fef9fe569560cdd870053776956743f796055f2119399b9ca6c0df12fedd789ae46324d071e5126c4e495 SHA512 7b0f25d91b1b5c317980fc88e059200bd43b56a70b445fbc72fb9b96e09775bfd3a98e9bd9d662af80f0ce3aef527c777ee82777e96ca876f47a972d63da8606
@@ -55,3 +56,5 @@ DIST rustc-1.89.0-src.tar.xz 267487572 BLAKE2B 9f6e3c595f843c239b57f14e26685e985
 DIST rustc-1.89.0-src.tar.xz.asc 801 BLAKE2B cd94da916d3646048d8f90c6de658de2981d0c815a1f8da01fe58ab6ec133e47180c8b506a41e22c68b3cb77aff5bd3bfc966a71ae2b73849918096d68764386 SHA512 006b91bf41fbedf91c39b8a6e483b089f69af7e78026f2903928fed64e44ee6aa53e46fd19bae31b1576b53a80dab66bf3e53a3bf79f820066d36285d706b90c
 DIST rustc-1.90.0-src.tar.xz 272348992 BLAKE2B 82dbbe3b5fe79f623c74fb81a4c4372b14e7d765f0e9af3d76a6c4bde9899007c85c8af70dfd9facc06c37a9c8d03a4597ec87b2d053585ccbc2287332b27e70 SHA512 fb0798b4c7450754db2fcbb641202909d209c6db2d9181d7df7282217b8320dc52f5e9853de9d7bdb79177f1f920389450cab07674dea5fb5501eaab5816662a
 DIST rustc-1.90.0-src.tar.xz.asc 801 BLAKE2B 1e84c6134c4fedbbd52610c259c1bdacb45bc97e8cce7a6b5a8c92827a072c88fcf8984893a5e6aa28c2d5d82bd849bb9d38390c783cfaa503a18c99bcaabcde SHA512 fc8f6dfbb4b50777ae8e499883f95b64861db0ca37119b34b3670b4adf51dd248b0b33daafee90e0f22f66b1d8bd8ae6a6107106e95e73f5c2c5a8dc29532e2e
+DIST rustc-1.91.0_beta20250928-src.tar.xz 284030160 BLAKE2B f5df2137e3a08b51f034543d1bcd0793f7d29264e81926458f6071c6f2de4093170ec5d257e56a9940b10494642eab9e57bffd24d61e8682ff052bd62517543b SHA512 e2ea6676f01b35cbd632c7a36d53b8d6d1e02a74fa460243575036b99406781416629300fef58ae04dffa8ed40f5448ca167654fb14db6676d57fc6cc2b31481
+DIST rustc-1.91.0_beta20250928-src.tar.xz.asc 801 BLAKE2B 70c58b0eb97b735835c37060e2e1ed13ed3531355cf36006c33ba5dbed2f252bda6900e4846693146fd8a093dd3b523a653166588ed1335fb22736e2e5a46567 SHA512 07eed611a38290582329512667d88cfb22d30119d9947169337844534bdbe9113f048080fbfa4dce95e3132319053919c6b11254c6e259cdaed788fa5ac777df
diff --git a/dev-lang/rust/rust-1.91.0_beta20250928.ebuild b/dev-lang/rust/rust-1.91.0_beta20250928.ebuild
new file mode 100644
index 0000000000000..b84b675c5c36b
--- /dev/null
+++ b/dev-lang/rust/rust-1.91.0_beta20250928.ebuild
@@ -0,0 +1,837 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+LLVM_COMPAT=( 21 )
+PYTHON_COMPAT=( python3_{11..14} )
+
+RUST_PATCH_VER=${PVR}
+
+RUST_MAX_VER=${PV%%_*}
+if [[ ${PV} == *9999* ]]; then
+	RUST_MIN_VER="1.88.0" # Update this as new `beta` releases come out.
+elif [[ ${PV} == *beta* ]]; then
+	RUST_MAX_VER="$(ver_cut 1).$(ver_cut 2).0"
+	RUST_MIN_VER="$(ver_cut 1).$(($(ver_cut 2) - 1)).0"
+else
+	RUST_MIN_VER="$(ver_cut 1).$(($(ver_cut 2) - 1)).0"
+fi
+
+inherit check-reqs estack flag-o-matic llvm-r1 multiprocessing optfeature \
+	multilib multilib-build python-any-r1 rust rust-toolchain toolchain-funcs verify-sig
+
+if [[ ${PV} = *9999* ]]; then
+	inherit git-r3
+elif [[ ${PV} == *beta* ]]; then
+	# Identify the snapshot date of the beta release:
+	# curl -Ls static.rust-lang.org/dist/channel-rust-beta.toml | grep beta-src.tar.xz
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	MY_P="rustc-beta"
+	SRC_URI="https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz
+		https://gitweb.gentoo.org/proj/rust-patches.git/snapshot/rust-patches-${RUST_PATCH_VER}.tar.bz2
+		verify-sig? ( https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz.asc
+			-> rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/${MY_P}-src"
+else
+	MY_P="rustc-${PV}"
+	SRC_URI="https://static.rust-lang.org/dist/${MY_P}-src.tar.xz
+		https://gitweb.gentoo.org/proj/rust-patches.git/snapshot/rust-patches-${RUST_PATCH_VER}.tar.bz2
+		verify-sig? ( https://static.rust-lang.org/dist/${MY_P}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/${MY_P}-src"
+	KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+DESCRIPTION="Systems programming language originally developed by Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+# keep in sync with llvm ebuild of the same version as bundled one.
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARC ARM AVR BPF CSKY DirectX Hexagon Lanai
+	LoongArch M68k Mips MSP430 NVPTX PowerPC RISCV Sparc SPIRV SystemZ VE
+	WebAssembly X86 XCore Xtensa )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/(-)?}
+
+# https://github.com/rust-lang/llvm-project/blob/rustc-1.84.0/llvm/CMakeLists.txt
+_ALL_RUST_EXPERIMENTAL_TARGETS=( ARC CSKY DirectX M68k SPIRV Xtensa )
+declare -A ALL_RUST_EXPERIMENTAL_TARGETS
+for _x in "${_ALL_RUST_EXPERIMENTAL_TARGETS[@]}"; do
+	ALL_RUST_EXPERIMENTAL_TARGETS["llvm_targets_${_x}"]=0
+done
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
+SLOT="${PV%%_*}" # Beta releases get to share the same SLOT as the eventual stable
+
+IUSE="big-endian clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind lto rustfmt rust-analyzer rust-src +system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+if [[ ${PV} = *9999* ]]; then
+	# These USE flags require nightly rust
+	IUSE+=" miri"
+fi
+
+LLVM_DEPEND=()
+# splitting usedeps needed to avoid CI/pkgcheck's UncheckableDep limitation
+for _x in "${ALL_LLVM_TARGETS[@]}"; do
+	LLVM_DEPEND+=( "	${_x}? ( $(llvm_gen_dep "llvm-core/llvm:\${LLVM_SLOT}[${_x}=]") )" )
+	if [[ -v ALL_RUST_EXPERIMENTAL_TARGETS["${_x}"] ]] ; then
+		ALL_RUST_EXPERIMENTAL_TARGETS["${_x}"]=1
+	fi
+done
+LLVM_DEPEND+=( "	wasm? ( $(llvm_gen_dep 'llvm-core/lld:${LLVM_SLOT}') )" )
+LLVM_DEPEND+=( "	$(llvm_gen_dep 'llvm-core/llvm:${LLVM_SLOT}')" )
+
+# dev-libs/oniguruma is used for documentation
+BDEPEND="${PYTHON_DEPS}
+	app-eselect/eselect-rust
+	dev-libs/oniguruma
+	|| (
+		>=sys-devel/gcc-4.7[cxx]
+		>=llvm-core/clang-3.5
+	)
+	lto? ( system-llvm? (
+		|| (
+			$(llvm_gen_dep 'llvm-core/lld:${LLVM_SLOT}')
+			sys-devel/mold
+		)
+	) )
+	!system-llvm? (
+		>=dev-build/cmake-3.13.4
+		app-alternatives/ninja
+	)
+	test? ( dev-debug/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? (
+		${LLVM_DEPEND[*]}
+		llvm-libunwind? ( llvm-runtimes/libunwind:= )
+	)
+	!system-llvm? (
+		!llvm-libunwind? (
+			elibc_musl? ( sys-libs/libunwind:= )
+		)
+	)
+"
+
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+	dev-lang/rust-common
+	sys-apps/lsb-release
+	!dev-lang/rust:stable
+	!dev-lang/rust-bin:stable
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+	rust-analyzer? ( rust-src )
+	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}/${SLOT}/bin/.*
+	usr/lib/${PN}/${SLOT}/libexec/.*
+	usr/lib/${PN}/${SLOT}/lib/lib.*.so
+	usr/lib/${PN}/${SLOT}/lib/rustlib/.*/bin/.*
+	usr/lib/${PN}/${SLOT}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_SONAME="
+	usr/lib/${PN}/${SLOT}/lib/lib.*.so.*
+	usr/lib/${PN}/${SLOT}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_PRESTRIPPED="
+	usr/lib/${PN}/${SLOT}/lib/rustlib/.*/bin/rust-llvm-dwp
+	usr/lib/${PN}/${SLOT}/lib/rustlib/.*/lib/self-contained/crtn.o
+"
+
+# An rmeta file is custom binary format that contains the metadata for the crate.
+# rmeta files do not support linking, since they do not contain compiled object files.
+# so we can safely silence the warning for this QA check.
+QA_EXECSTACK="usr/lib/${PN}/${SLOT}/lib/rustlib/*/lib*.rlib:lib.rmeta"
+
+# causes double bootstrap
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
+
+clear_vendor_checksums() {
+	sed -i 's/\("files":{\)[^}]*/\1/' "vendor/${1}/.cargo-checksum.json" || die
+}
+
+toml_usex() {
+	usex "${1}" true false
+}
+
+pre_build_checks() {
+	local M=9216
+	# 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} ))
+	if [[ ${PV} == *9999* ]]; then
+		M=$(( $(usex miri 128 0) + ${M} ))
+	fi
+	M=$(( $(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 doc 256 0) + ${M} ))
+	CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+llvm_check_deps() {
+	has_version -r "llvm-core/llvm:${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
+	[[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+pkg_pretend() {
+	pre_build_checks
+}
+
+pkg_setup() {
+	pre_build_checks
+	python-any-r1_pkg_setup
+
+	export LIBGIT2_NO_PKG_CONFIG=1 #749381
+	if tc-is-cross-compiler; then
+		use system-llvm && die "USE=system-llvm not allowed when cross-compiling"
+		local cross_llvm_target="$(llvm_tuple_to_target "${CBUILD}")"
+		use "llvm_targets_${cross_llvm_target}" || \
+			die "Must enable LLVM_TARGETS=${cross_llvm_target} matching CBUILD=${CBUILD} when cross-compiling"
+	fi
+
+	rust_pkg_setup
+
+	if use system-llvm; then
+		llvm-r1_pkg_setup
+
+		local llvm_config="$(get_llvm_prefix)/bin/llvm-config"
+		export LLVM_LINK_SHARED=1
+		export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" --libdir)"
+	fi
+}
+
+rust_live_get_sources() {
+	EGIT_REPO_URI="
+		https://anongit.gentoo.org/git/proj/rust-patches.git
+	"
+	EGIT_CHECKOUT_DIR="${WORKDIR}/rust-patches-${RUST_PATCH_VER}"
+	git-r3_src_unpack
+
+	EGIT_REPO_URI="
+		https://github.com/rust-lang/rust.git
+	"
+	EGIT_SUBMODULES=(
+		"*"
+		"-src/gcc"
+	)
+	S="${WORKDIR}/rust"
+	EGIT_CHECKOUT_DIR="${S}"
+	git-r3_src_unpack
+}
+
+src_unpack() {
+	if [[ ${PV} == *9999* ]] ; then
+		rust_live_get_sources
+
+		# Vendor dependencies
+		mkdir "${S}/.cargo" || die # The vendor script has a check for .cargo/config{,.toml}
+		touch "${S}/.cargo/bootstrap.toml" || die
+		local rust_stage0_root="$(${RUSTC} --print sysroot || die "Can't determine rust's sysroot")"
+		# Configure vendor to use the portage-provided toolchain. This prevents it from
+		# attempting to fetch a `beta` toolchain from the internet.
+		cat <<- _EOF_ > "${T}/vendor-bootstrap.toml"
+			# Suppresses a warning about tracking changes which we don't care about.
+			change-id = "ignore"
+			[build]
+			build = "$(rust_abi "${CBUILD}")"
+			host = ["$(rust_abi "${CHOST}")"]
+			target = ["$(rust_abi "${CHOST}")"]
+			cargo = "${rust_stage0_root}/bin/cargo"
+			rustc = "${rust_stage0_root}/bin/rustc"
+			rustfmt = "${rust_stage0_root}/bin/rustfmt"
+		_EOF_
+		# We're using git sources so we need to run the Vendor script
+		# to ensure that all dependencies are present and up-to-date
+		mkdir "${S}/vendor" || die
+		# This also compiles the 'build helper', there's no way to avoid this.
+		${EPYTHON} "${S}"/x.py vendor -v --config="${T}"/vendor-bootstrap.toml -j$(makeopts_jobs) ||
+			die "Failed to vendor dependencies"
+		# TODO: This has to be generated somehow, this is from a 1.84.x tarball I had lying around.
+		cat <<- _EOF_ > "${S}/.cargo/config.toml"
+			[source.crates-io]
+			replace-with = "vendored-sources"
+
+			[source."git+https://github.com/rust-lang/team"]
+			git = "https://github.com/rust-lang/team"
+			replace-with = "vendored-sources"
+
+			[source.vendored-sources]
+			directory = "vendor"
+		_EOF_
+	elif use verify-sig ; then
+		# Patch tarballs are not signed (but we trust Gentoo infra)
+		verify-sig_verify_detached "${DISTDIR}"/rustc-${PV}-src.tar.xz{,.asc}
+		default
+	else
+		default
+	fi
+}
+
+src_prepare() {
+	if [[ ${PV} = *9999* ]]; then
+		# We need to update / generate lockfiles for the workspace
+		${CARGO} generate-lockfile --offline || die "Failed to generate lockfiles"
+	fi
+
+	# Commit patches to the appropriate branch in proj/rust-patches.git
+	# then cut a new tag / tarball. Don't add patches to ${FILESDIR}
+	PATCHES=(
+		"${WORKDIR}/rust-patches-${RUST_PATCH_VER}/"
+	)
+
+	if use lto && tc-is-clang && ! tc-ld-is-lld && ! tc-ld-is-mold; then
+		export RUSTFLAGS+=" -C link-arg=-fuse-ld=lld"
+	fi
+
+	default
+}
+
+src_configure() {
+	if tc-is-cross-compiler; then
+		export PKG_CONFIG_ALLOW_CROSS=1
+		export PKG_CONFIG_PATH="${ESYSROOT}/usr/$(get_libdir)/pkgconfig"
+		export OPENSSL_INCLUDE_DIR="${ESYSROOT}/usr/include"
+		export OPENSSL_LIB_DIR="${ESYSROOT}/usr/$(get_libdir)"
+	fi
+
+	# Avoid bundled copies of libraries
+	export RUSTONIG_SYSTEM_LIBONIG=1
+	# Need to check if these can be optional
+	#export LIBSQLITE3_SYS_USE_PKG_CONFIG=1
+	#export LIBSSH2_SYS_USE_PKG_CONFIG=1
+
+	filter-lto # 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 ${v##*.}))\""
+	done
+	if use wasm; then
+		rust_targets+=",\"wasm32-unknown-unknown\""
+		if use system-llvm; then
+			# un-hardcode rust-lld linker for this target
+			# https://bugs.gentoo.org/715348
+			sed -i '/linker:/ s/rust-lld/wasm-ld/' compiler/rustc_target/src/spec/base/wasm.rs || die
+		fi
+	fi
+	rust_targets="${rust_targets#,}"
+
+	# cargo and rustdoc are mandatory and should always be included
+	local tools='"cargo","rustdoc"'
+	use clippy && tools+=',"clippy"'
+	use rustfmt && tools+=',"rustfmt"'
+	use rust-analyzer && tools+=',"rust-analyzer","rust-analyzer-proc-macro-srv"'
+	use rust-src && tools+=',"src"'
+
+	if [[ ${PV} == *9999* ]]; then
+		use miri && tools+=',"miri"'
+	fi
+
+	local rust_stage0_root="$(${RUSTC} --print sysroot || die "Can't determine rust's sysroot")"
+	# 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="$(rust_abi)"
+	rust_build="$(rust_abi "${CBUILD}")"
+	rust_host="$(rust_abi "${CHOST}")"
+
+	RUST_EXPERIMENTAL_TARGETS=()
+	for _x in "${!ALL_RUST_EXPERIMENTAL_TARGETS[@]}"; do
+		if [[ ${ALL_RUST_EXPERIMENTAL_TARGETS[${_x}]} == 1 ]] && use ${_x} ; then
+			RUST_EXPERIMENTAL_TARGETS+=( ${_x#llvm_targets_} )
+		fi
+	done
+	RUST_EXPERIMENTAL_TARGETS=${RUST_EXPERIMENTAL_TARGETS[@]}
+
+	local cm_btype="$(usex debug DEBUG RELEASE)"
+	local build_channel
+	local build_miri="false"
+	case "${PV}" in
+		*9999*)
+			build_channel="nightly"
+			;;
+		*beta*)
+			build_channel="beta"
+			;;
+		*)
+			build_channel="stable"
+			;;
+	esac
+	cat <<- _EOF_ > "${S}"/bootstrap.toml
+		# Suppresses a warning about tracking changes which we don't care about.
+		change-id = "ignore"
+		# https://github.com/rust-lang/rust/issues/135358 (bug #947897)
+		profile = "dist"
+		[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 = "${RUST_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"
+		$(if ! tc-is-cross-compiler; then
+			# When cross-compiling, LLVM is compiled twice, once for host and
+			# once for target.  Unfortunately, this build configuration applies
+			# to both, which means any flags applicable to one target but not
+			# the other will break.  Conditionally disable respecting user
+			# flags when cross-compiling.
+			echo "CMAKE_C_FLAGS_${cm_btype} = \"${CFLAGS}\""
+			echo "CMAKE_CXX_FLAGS_${cm_btype} = \"${CXXFLAGS}\""
+			echo "CMAKE_EXE_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
+			echo "CMAKE_MODULE_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
+			echo "CMAKE_SHARED_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
+			echo "CMAKE_STATIC_LINKER_FLAGS_${cm_btype} = \"${ARFLAGS}\""
+		fi)
+		[build]
+		build-stage = 2
+		test-stage = 2
+		build = "${rust_build}"
+		host = ["${rust_host}"]
+		target = [${rust_targets}]
+		cargo = "${rust_stage0_root}/bin/cargo"
+		rustc = "${rust_stage0_root}/bin/rustc"
+		rustfmt = "${rust_stage0_root}/bin/rustfmt"
+		description = "gentoo"
+		docs = $(toml_usex doc)
+		compiler-docs = false
+		submodules = false
+		python = "${EPYTHON}"
+		locked-deps = true
+		vendor = true
+		extended = true
+		tools = [${tools}]
+		verbose = 2
+		sanitizers = false
+		profiler = true
+		cargo-native-static = false
+		[install]
+		prefix = "${EPREFIX}/usr/lib/${PN}/${SLOT}"
+		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
+		$(if ! tc-is-cross-compiler; then
+			echo "default-linker = \"${CHOST}-cc\""
+		fi)
+		channel = "${build_channel}"
+		rpath = true
+		verbose-tests = true
+		optimize-tests = $(toml_usex !debug)
+		codegen-tests = true
+		omit-git-hash = false
+		dist-src = false
+		remap-debuginfo = true
+		lld = $(usex system-llvm false $(toml_usex wasm))
+		$(if use lto && tc-is-clang && ! tc-ld-is-mold; then
+			echo "use-lld = true"
+		fi)
+		# 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 $(usex doc false true) true)
+		backtrace-on-ice = true
+		jemalloc = false
+		# See https://github.com/rust-lang/rust/issues/121124
+		lto = "$(usex lto thin 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}"/bootstrap.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}"/bootstrap.toml
+				llvm-config = "$(get_llvm_prefix)/bin/llvm-config"
+			_EOF_
+		fi
+		# by default librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
+		# but we patch it and set to false here as well
+		if use elibc_musl; then
+			cat <<- _EOF_ >> "${S}"/bootstrap.toml
+				crt-static = false
+				musl-root = "$($(tc-getCC) -print-sysroot)/usr"
+			_EOF_
+		fi
+	done
+	if use wasm; then
+		wasm_target="wasm32-unknown-unknown"
+		export CFLAGS_${wasm_target//-/_}="$(filter-flags '-mcpu*' '-march*' '-mtune*'; echo "$CFLAGS")"
+		cat <<- _EOF_ >> "${S}"/bootstrap.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}"/bootstrap.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_ >> "${S}"/bootstrap.toml
+				llvm-config = "$(get_llvm_prefix)/bin/llvm-config"
+			_EOF_
+		fi
+		if [[ "${cross_toolchain}" == *-musl* ]]; then
+			cat <<- _EOF_ >> "${S}"/bootstrap.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#\[.*\]#\[${rust_targets}\]#" bootstrap.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="\"${MAGIC_EXTRA_RUSTFLAGS}\""
+	env | grep "CARGO_TARGET_.*_RUSTFLAGS="
+	env | grep "CFLAGS_.*"
+	echo
+	einfo "bootstrap.toml contents:"
+	cat "${S}"/bootstrap.toml || die
+	echo
+}
+
+src_compile() {
+	# -v will show invocations, -vv "very verbose" is overkill, -vvv "very very verbose" is insane
+	RUST_BACKTRACE=1 "${EPYTHON}" ./x.py build -v --config="${S}"/bootstrap.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="${S}"/bootstrap.toml \
+				-j$(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}" "${EPYTHON}" ./x.py install -v --config="${S}"/bootstrap.toml -j$(makeopts_jobs) || die
+
+	docompress /usr/lib/${PN}/${SLOT}/share/man/
+
+	# bug #689562, #689160
+	rm -v "${ED}/usr/lib/${PN}/${SLOT}/etc/bash_completion.d/cargo" || die
+	rmdir -v "${ED}/usr/lib/${PN}/${SLOT}"/etc/bash_completion.d || die
+
+	local symlinks=(
+		cargo
+		rustc
+		rustdoc
+		rust-gdb
+		rust-gdbgui
+		rust-lldb
+	)
+
+	use clippy && symlinks+=( clippy-driver cargo-clippy )
+	if [[ ${PV} = *9999* ]]; then
+		use miri && symlinks+=( miri cargo-miri )
+	fi
+	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}/${SLOT}/bin/${i}" ]]; then
+			einfo "Installing ${i} symlink"
+			ln -v "${ED}/usr/lib/${PN}/${SLOT}/bin/${i}" "${ED}/usr/lib/${PN}/${SLOT}/bin/${ver_i}" || die
+		else
+			ewarn "${i} symlink requested, but source file not found"
+			ewarn "please report this"
+		fi
+		dosym "../lib/${PN}/${SLOT}/bin/${ver_i}" "/usr/bin/${ver_i}"
+	done
+
+	# symlinks to switch components to active rust in eselect
+	dosym "${SLOT}/lib" "/usr/lib/${PN}/lib-${SLOT}"
+	use rust-analyzer && dosym "${SLOT}/libexec" "/usr/lib/${PN}/libexec-${SLOT}"
+	dosym "${SLOT}/share/man" "/usr/lib/${PN}/man-${SLOT}"
+	dosym "rust/${SLOT}/lib/rustlib" "/usr/lib/rustlib-${SLOT}"
+	dosym "../../lib/${PN}/${SLOT}/share/doc/rust" "/usr/share/doc/${P}"
+
+	newenvd - "50${P}" <<-_EOF_
+		MANPATH="${EPREFIX}/usr/lib/rust/man-${SLOT}"
+	_EOF_
+
+	rm -rf "${ED}/usr/lib/${PN}/${SLOT}"/*.old || die
+	rm -rf "${ED}/usr/lib/${PN}/${SLOT}/bin"/*.old || die
+	rm -rf "${ED}/usr/lib/${PN}/${SLOT}/doc"/*.old || die
+
+	# note: eselect-rust adds EROOT to all paths below
+	cat <<-_EOF_ > "${T}/provider-${PN}-${SLOT}"
+		/usr/bin/cargo
+		/usr/bin/rustdoc
+		/usr/bin/rust-gdb
+		/usr/bin/rust-gdbgui
+		/usr/bin/rust-lldb
+		/usr/lib/rustlib
+		/usr/lib/rust/lib
+		/usr/lib/rust/man
+		/usr/share/doc/rust
+	_EOF_
+
+	if use clippy; then
+		echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
+	fi
+	if [[ ${SLOT} == *9999* ]] && use miri; then
+		echo /usr/bin/miri >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-miri >> "${T}/provider-${P}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+	fi
+	if use rust-analyzer; then
+		echo /usr/lib/rust/libexec >> "${T}/provider-${P}"
+		echo /usr/bin/rust-analyzer >> "${T}/provider-${P}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${PN}-${SLOT}"
+
+	if use dist; then
+		"${EPYTHON}" ./x.py dist -v --config="${S}"/bootstrap.toml -j$(makeopts_jobs) || die
+		insinto "/usr/lib/${PN}/${SLOT}/dist"
+		doins -r "${S}/build/dist/."
+	fi
+}
+
+pkg_postinst() {
+
+	eselect rust update
+
+	if has_version dev-debug/gdb || has_version llvm-core/lldb; then
+		elog "Rust installs helper scripts for calling GDB and LLDB,"
+		elog "for convenience they are installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+	fi
+
+	if has_version app-editors/emacs; then
+		optfeature "emacs support for rust" app-emacs/rust-mode
+	fi
+
+	if has_version app-editors/gvim || has_version app-editors/vim; then
+		optfeature "vim support for rust" app-vim/rust-vim
+	fi
+}
+
+pkg_postrm() {
+	eselect rust cleanup
+}
diff --git a/dev-lang/rust/rust-9999.ebuild b/dev-lang/rust/rust-9999.ebuild
index 3ef79e7077b54..b1aa0b11704cb 100644
--- a/dev-lang/rust/rust-9999.ebuild
+++ b/dev-lang/rust/rust-9999.ebuild
@@ -3,14 +3,14 @@
 
 EAPI=8
 
-LLVM_COMPAT=( 20 )
+LLVM_COMPAT=( 21 )
 PYTHON_COMPAT=( python3_{11..14} )
 
 RUST_PATCH_VER=${PVR}
 
 RUST_MAX_VER=${PV%%_*}
 if [[ ${PV} == *9999* ]]; then
-	RUST_MIN_VER="1.89.0" # Update this as new `beta` releases come out.
+	RUST_MIN_VER="1.91.0" # Update this as new `beta` releases come out.
 elif [[ ${PV} == *beta* ]]; then
 	RUST_MAX_VER="$(ver_cut 1).$(ver_cut 2).0"
 	RUST_MIN_VER="$(ver_cut 1).$(($(ver_cut 2) - 1)).0"
diff --git a/eclass/rust.eclass b/eclass/rust.eclass
index 52c0738b7fd87..309a3f4d5d19c 100644
--- a/eclass/rust.eclass
+++ b/eclass/rust.eclass
@@ -67,7 +67,8 @@ fi
 # @DESCRIPTION:
 # Definitive list of Rust slots and the associated LLVM slot, newest first.
 declare -A -g -r _RUST_LLVM_MAP=(
-	["9999"]=20
+	["9999"]=21
+	["1.91.0"]=21
 	["1.90.0"]=20
 	["1.89.0"]=20
 	["1.88.0"]=20
diff --git a/sys-devel/rust-std/Manifest b/sys-devel/rust-std/Manifest
index 63ee11b1ee0a9..f291cb3cee286 100644
--- a/sys-devel/rust-std/Manifest
+++ b/sys-devel/rust-std/Manifest
@@ -18,3 +18,5 @@ DIST rustc-1.89.0-src.tar.xz 267487572 BLAKE2B 9f6e3c595f843c239b57f14e26685e985
 DIST rustc-1.89.0-src.tar.xz.asc 801 BLAKE2B cd94da916d3646048d8f90c6de658de2981d0c815a1f8da01fe58ab6ec133e47180c8b506a41e22c68b3cb77aff5bd3bfc966a71ae2b73849918096d68764386 SHA512 006b91bf41fbedf91c39b8a6e483b089f69af7e78026f2903928fed64e44ee6aa53e46fd19bae31b1576b53a80dab66bf3e53a3bf79f820066d36285d706b90c
 DIST rustc-1.90.0-src.tar.xz 272348992 BLAKE2B 82dbbe3b5fe79f623c74fb81a4c4372b14e7d765f0e9af3d76a6c4bde9899007c85c8af70dfd9facc06c37a9c8d03a4597ec87b2d053585ccbc2287332b27e70 SHA512 fb0798b4c7450754db2fcbb641202909d209c6db2d9181d7df7282217b8320dc52f5e9853de9d7bdb79177f1f920389450cab07674dea5fb5501eaab5816662a
 DIST rustc-1.90.0-src.tar.xz.asc 801 BLAKE2B 1e84c6134c4fedbbd52610c259c1bdacb45bc97e8cce7a6b5a8c92827a072c88fcf8984893a5e6aa28c2d5d82bd849bb9d38390c783cfaa503a18c99bcaabcde SHA512 fc8f6dfbb4b50777ae8e499883f95b64861db0ca37119b34b3670b4adf51dd248b0b33daafee90e0f22f66b1d8bd8ae6a6107106e95e73f5c2c5a8dc29532e2e
+DIST rustc-1.91.0_beta20250928-src.tar.xz 284030160 BLAKE2B f5df2137e3a08b51f034543d1bcd0793f7d29264e81926458f6071c6f2de4093170ec5d257e56a9940b10494642eab9e57bffd24d61e8682ff052bd62517543b SHA512 e2ea6676f01b35cbd632c7a36d53b8d6d1e02a74fa460243575036b99406781416629300fef58ae04dffa8ed40f5448ca167654fb14db6676d57fc6cc2b31481
+DIST rustc-1.91.0_beta20250928-src.tar.xz.asc 801 BLAKE2B 70c58b0eb97b735835c37060e2e1ed13ed3531355cf36006c33ba5dbed2f252bda6900e4846693146fd8a093dd3b523a653166588ed1335fb22736e2e5a46567 SHA512 07eed611a38290582329512667d88cfb22d30119d9947169337844534bdbe9113f048080fbfa4dce95e3132319053919c6b11254c6e259cdaed788fa5ac777df
diff --git a/sys-devel/rust-std/rust-std-1.91.0_beta20250928.ebuild b/sys-devel/rust-std/rust-std-1.91.0_beta20250928.ebuild
new file mode 100644
index 0000000000000..ac1ac73a0723a
--- /dev/null
+++ b/sys-devel/rust-std/rust-std-1.91.0_beta20250928.ebuild
@@ -0,0 +1,182 @@
+# Copyright 2020-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..13} )
+
+inherit edo flag-o-matic multiprocessing python-any-r1 rust-toolchain toolchain-funcs verify-sig
+
+DESCRIPTION="Rust standard library, standalone (for crossdev)"
+HOMEPAGE="https://www.rust-lang.org"
+
+if [[ ${PV} = *9999* ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/rust-lang/rust.git"
+	EGIT_SUBMODULES=(
+			"*"
+			"-src/gcc"
+	)
+elif [[ ${PV} == *beta* ]]; then
+	# Identify the snapshot date of the beta release:
+	# curl -Ls static.rust-lang.org/dist/channel-rust-beta.toml | grep beta-src.tar.xz
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	MY_P="rustc-beta"
+	SRC_URI="https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz
+			verify-sig? ( https://static.rust-lang.org/dist/${BETA_SNAPSHOT}/rustc-beta-src.tar.xz.asc
+					-> rustc-${PV}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/${MY_P}-src"
+else
+	MY_P="rustc-${PV}"
+	SRC_URI="https://static.rust-lang.org/dist/${MY_P}-src.tar.xz
+			verify-sig? ( https://static.rust-lang.org/dist/${MY_P}-src.tar.xz.asc )
+	"
+	S="${WORKDIR}/${MY_P}-src"
+fi
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD-1 BSD-2 BSD-4"
+SLOT="stable/$(ver_cut 1-2)"
+# please do not keyword
+#KEYWORDS="" #nowarn
+IUSE="debug"
+
+BDEPEND="
+	${PYTHON_DEPS}
+	~dev-lang/rust-${PV}:=
+	verify-sig? ( sec-keys/openpgp-keys-rust )
+"
+DEPEND="||
+	(
+		>="${CATEGORY}"/gcc-4.7:*
+		>="${CATEGORY/sys-devel/llvm-core}"/clang-3.5:*
+	)
+"
+RDEPEND="${DEPEND}"
+
+# need full compiler to run tests
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
+
+QA_FLAGS_IGNORED="usr/lib/rust/${PV}/rustlib/.*/lib/lib.*.so"
+
+PATCHES=(
+	"${FILESDIR}"/1.89.0-enable-stage-0-build.patch  # remove for >=1.91.0
+)
+#
+# The cross magic
+#
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+
+is_cross() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+toml_usex() {
+	usex "$1" true false
+}
+
+pkg_pretend() {
+	is_cross || die "${PN} should only be used for cross"
+}
+
+pkg_setup() {
+	python-any-r1_pkg_setup
+}
+
+src_prepare() {
+	default
+}
+
+src_configure() {
+	# do the great cleanup
+	strip-flags
+	filter-flags '-mcpu=*' '-march=*' '-mtune=*' '-m32' '-m64'
+	strip-unsupported-flags
+
+	local rust_root x
+	rust_root="$(rustc --print sysroot)"
+	rtarget="$(rust_abi ${CTARGET})"
+	rtarget="${ERUST_STD_RTARGET:-${rtarget}}" # some targets need to be custom.
+	rbuild="$(rust_abi ${CBUILD})"
+	rhost="$(rust_abi ${CHOST})"
+
+	echo
+	for x in CATEGORY rust_root rbuild rhost rtarget RUSTFLAGS CFLAGS CXXFLAGS LDFLAGS; do
+		einfo "$(printf '%10s' ${x^^}:) ${!x}"
+	done
+
+	cat <<- EOF > "${S}"/bootstrap.toml
+		[build]
+		build = "${rbuild}"
+		host = ["${rhost}"]
+		target = ["${rtarget}"]
+		cargo = "${rust_root}/bin/cargo"
+		rustc = "${rust_root}/bin/rustc"
+		submodules = false
+		python = "${EPYTHON}"
+		locked-deps = true
+		vendor = true
+		extended = true
+		verbose = 2
+		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)"
+		rpath = false
+		dist-src = false
+		remap-debuginfo = true
+		jemalloc = false
+		[dist]
+		src-tarball = false
+		[target.${rtarget}]
+		ar = "$(tc-getAR ${CTARGET})"
+		cc = "$(tc-getCC ${CTARGET})"
+		cxx = "$(tc-getCXX ${CTARGET})"
+		linker = "$(tc-getCC ${CTARGET})"
+		ranlib = "$(tc-getRANLIB ${CTARGET})"
+		$(usev elibc_musl 'crt-static = false')
+	EOF
+
+	einfo "${PN^} configured with the following settings:"
+	cat "${S}"/bootstrap.toml || die
+}
+
+src_compile() {
+	edo env RUST_BACKTRACE=1 \
+		"${EPYTHON}" ./x.py build -vv --config="${S}"/bootstrap.toml -j$(makeopts_jobs) \
+		library/std --stage 0
+}
+
+src_test() {
+	ewarn "${PN} can't run tests"
+}
+
+src_install() {
+	local rustlib="lib/rust/${PV}/lib/rustlib"
+	dodir "/usr/${rustlib}"
+	pushd "build/${rhost}/stage0-sysroot/lib/rustlib" > /dev/null || die
+	cp -pPRv "${rtarget}" "${ED}/usr/${rustlib}" || die
+	popd > /dev/null || die
+}