6 files changed, 1264 insertions, 0 deletions
diff --git a/dev-lang/rust-bin/Manifest b/dev-lang/rust-bin/Manifest
index 275899b19197..d51e61e9959d 100644
--- a/dev-lang/rust-bin/Manifest
+++ b/dev-lang/rust-bin/Manifest
@@ -692,6 +692,34 @@ DIST rust-1.91.0_beta20250928-x86_64-unknown-linux-gnu.tar.xz 207672796 BLAKE2B
 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-1.91.0_beta20251009-aarch64-unknown-linux-gnu.tar.xz 169413468 BLAKE2B 5f15fb75cc40be2389da96f77c78d59f61ec966c5b5747b4363bb638661d88f8944e6adc42f64e42a1f56f9022a32fbdeb446bf6fcc92bd455c72c256ba9ce5f SHA512 cb96e3760da1138e67d11023d0bd45c3d8e9f6fcf6097244e0e3dffe8ffc606dc907000799db590c4686a62341a71ae5f144602e558378d1cd7db18b0ab5a85b
+DIST rust-1.91.0_beta20251009-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 467955d95c435bdf02c38a087431abcf3fd2a7ae53d452f7f8f47c0a62206fbdf60ad6ebb674d4a33ccc82dca179ef0156ad66fe6e7229df0ad0b742105f2a49 SHA512 fff55a39cc3c9a0d3e8f59004163d27ea74d4a80ebc2f26851c73ad2bc67f97153258be79a5b7e613d1aecca8064de9c58ab56dbb29372d327af48c162f39fb3
+DIST rust-1.91.0_beta20251009-aarch64-unknown-linux-musl.tar.xz 244357468 BLAKE2B 5218537948b4ab12005382058ff2d506190bec936a08db7ae74ca7aa525cbbff863dc468ab13037b6839abb82306593825a4aad0517fa5302a36adfdfe04aa1e SHA512 54fbefb26bfaf891b1181abde38f350b48b19b984467e9cdbc4096451b51145953675fdda1fff0749498dddd19583cb1525f38148707d02d6daccb2af4433244
+DIST rust-1.91.0_beta20251009-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B cb68322a4c9a7a61c86c4086eec75f6835b7e35083cb9f4cac021d8a0508fd3fd00ac8c6e854f828fc138826752b9e321a368d83d22ea487cc3e266da1493198 SHA512 b56cc826a981ac07484df73fda4b9f24cff3105fd23442be488a41c933505a432ba967d6b7dd9a086eaace93039fe2fbd0b4273acb333290c4224e81f35cd413
+DIST rust-1.91.0_beta20251009-arm-unknown-linux-gnueabi.tar.xz 224676888 BLAKE2B 81a0c429b3891bb8e3729be3e4a33faefdd29cc187e9a197f2be78341085093cea56ddf8a1ff5ead12dc3786b597ccfad8629506bae36e94a4bb501a76d16b72 SHA512 6dbd3fe4b33f66933e6ccd968acacd7849ebf93076e1a05d157055ad537c329849799a8690a05e533b56e00f5a3638cf8fc40bc94db79f8fa9067e920c612be3
+DIST rust-1.91.0_beta20251009-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B cabc21e352ece556b2465364d0910950ba7fb84962d22bc4734b0218bb14a117684daa7739e77d62c1127fec6da2078a77ffc96b6307a4baac0cf40bc1814266 SHA512 5e0371b1d52118a9b43c4cee18e699d816efc857da51956bcdcfce119393a9668b75edc7368119b59060fa9cd82c114d7a221de2f4f9de57936bdac08191bad1
+DIST rust-1.91.0_beta20251009-arm-unknown-linux-gnueabihf.tar.xz 225164724 BLAKE2B 5926180bbed8d888816714922cae7fe7b51e09860f6693115b6793acff6331ef880bd5c27d0d769a894592d9553760976fbb18a464d0e1312ec8210a0759d1fb SHA512 821dccae3ecd91a4e2a1f5f7edef32fc77fe13b38ada5835773c231fd51c4d507cfce757adf0718f830775822994b337bd94e16a2b04a247fd43a215c0abccd1
+DIST rust-1.91.0_beta20251009-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B b54e1b475b3281b1b663f796d026a461de1b516726c2444ae556615b9c782779ccdb90570eff3a110f50fa0313373d083fe9b6024ef7c98b71264567a45fd5a5 SHA512 7608db4a60bd693aaf868759053e409b6ca030a84c80f0da1c996cfd45583d55d5e64d2c265b129e826d4c32b9dc060a72d0353fb42ba98e92d2eca316493049
+DIST rust-1.91.0_beta20251009-armv7-unknown-linux-gnueabihf.tar.xz 229700512 BLAKE2B c1fadc832253361736864f2ad44aabf2202ae00f5c2b02053ef982358b1de278deffb95dffc747de63b78ffb417439803a75c8ff6e54cecada9d532294534dec SHA512 1a4be7d5c1efd8077edc0bab9afffb3dea9385cd8adc75d1b89ad0a6f61c4def766ed3838608b9b1e66544e88755ec9c6381650c4e2f41ae396e9b630122bb36
+DIST rust-1.91.0_beta20251009-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 18644feb8c130537ee4396148ef8334929414b94b15a22182bbd9855b8902478f35ce7359410344af47ef7f0e6678666bc3d5e96f15f52ef38baa2e15e1d02ab SHA512 0519e3a35a2f89ebbfe90c7a3ab9ebcc3f6cc1c23508e95252559319a66e21fe35e5fb8b5189010dadfa34b1b3fc4b5718c9897b3e211b69bed0cc2d184166cc
+DIST rust-1.91.0_beta20251009-i686-unknown-linux-gnu.tar.xz 266811976 BLAKE2B 9891683a80675ac52d49111268378010e83c651530091aa90d9e2d2c0c086d03bc0a203a0fc93b3619f7c0db92a4d2680ed57f639771443da2e09a529d75d946 SHA512 1b0c873f0761fb033ee0fac892340b485730375d46ccc4848ad8c15bff43833d3758385f75a8469067035926d5bcd1af31e97f16339ad8b6e80a2e6d30f2fd04
+DIST rust-1.91.0_beta20251009-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B d2fecf2db909b6887980a9892ea47865f84c32fd921593f4ce7c8ba5d6224e455222561755feca8be7ef67b1d9e97dc4a9c84b4fd8f69e9ac7a0aefb180444f5 SHA512 f87472e7c849cbf9f52f4f38b78d6691fd0cad5b4c16d9fb2f017b6bee3c4a10da360c15cfaa2ecc5dc4e3132fd68cbc11913c5bf11ee77120bdbcdc0fb7f9bf
+DIST rust-1.91.0_beta20251009-loongarch64-unknown-linux-gnu.tar.xz 259844264 BLAKE2B 0d4bd996fbbf1a8615e5ba42da8e3dae3009bc6a671a885abd646769ac4b549b8ea859412bf8ecc6d1b45b782259488b9f5ff4c8531258a25ef56cffc40824d5 SHA512 01966b4271734e973f8cd69f839e98dd04fe6fe9742af2b1225f6df651bcf63259d9b00263a482b8025267ba1c634c74027ed3250a5159c81be0f02b35a264e6
+DIST rust-1.91.0_beta20251009-loongarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 62c05db951367bafc8b72339f3eecad40e10a0b1620d2e5ad9eb039b7a45b176b0f2743179e2c2d3d3da893baf17d3dea46174fe0f22ae6cc97c9503c239903b SHA512 cacb5d64be85b0346c185a46cbfc253bfe25ecd85ca62fa123ad76550e7569ce2ad678fa6f36dfae17da5c3d7ada86dc03ae626ba3dcad25bd80db176a644092
+DIST rust-1.91.0_beta20251009-powerpc-unknown-linux-gnu.tar.xz 249572892 BLAKE2B b5311cf7c23c7cc85b49638b9a0b99c8c539d86c045deb251d3c9dcd8c064264421111284d0adbdf8537bdc8cf559c536ed17c6366950ddc368750022aa77dbf SHA512 4aa70b7c3a639077eb7724871d9b00bf738cb0106a96bf53b2b0ebea1c907b9e7dfc134fece05d25d6c854a97934c3399a82d50cf0d05e027af00e18fe64b977
+DIST rust-1.91.0_beta20251009-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 6ca85376fb225ec8d212de45692e2d33c70131a04339957c6f3f4d77ce5bb80b249b514ceb70e12b649c93c3f0ffa689949fb3c069f04cb250cf0641b0313578 SHA512 f66ec732583e1420dc9558cd453f246dd3b84dadc95b0d940127a37d0f383f3518418017fc116532032e2df83f75ad76c534924923418c90b9a600c75905e863
+DIST rust-1.91.0_beta20251009-powerpc64-unknown-linux-gnu.tar.xz 251085480 BLAKE2B dfb2ea024e6f27e29441f1b6bb372de194bf4099bee99f11118a12236a1812d7674ae37ca69ddb684534b0bebe98b7f33addcf723fd57f36e0f873b4dfd893df SHA512 e0706c58963ebc27054418cfb7403ed0669f0e02cd3160e5a72160339e69d793025bcc65fa71b3a141109a0e8d4ac2a69c9860e8048d23358fe12fdb188f9682
+DIST rust-1.91.0_beta20251009-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B ad1d8921e46c18084813df0da595199d023cd1b6a28fb002d8ca185e111295f2372aea82fc808d2e02e3b9ef9005d6c832290efb2129bfa826827065cbd0997a SHA512 86f5da07d0186a0a502b5a4b3dbc9bfe3478acea3aacc42d444023d794e9350bc7160e1cee6117488a8405ac83d58185543277511757c8db76eadf43152549de
+DIST rust-1.91.0_beta20251009-powerpc64le-unknown-linux-gnu.tar.xz 269690328 BLAKE2B f7bdb9e5653ffc09d82f20a3507e5eab1bee81d2b2a357d542544e138a18f4068fc3810f21816918550c5c9e74f5776c3de7fab2b1ca6116f40016edc6615ca7 SHA512 bfde7b6fded043bd60413d502ba5aedb1084be983c6f8caf5db65dde7f49ef2777840b290e0f68284b29dac6b5cd8f00ba1cbf55da84160be24828cdade2081a
+DIST rust-1.91.0_beta20251009-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 11c91bab0ee1309f4c17d848dc178815ce06ff7bab5bd440d97405ebe9a4594637a52333023f9511b52dde2fc69d9ab06d7cab5a0d55041544f686661a28ca66 SHA512 42e3b07bdebf574d43ccd36b3e6ecce7d53184495d77826315abf92142ab8a2082639c9cf8dfe40e4b0196cfea031c6acb19caea958790b873743ad3be16ac52
+DIST rust-1.91.0_beta20251009-riscv64gc-unknown-linux-gnu.tar.xz 248629072 BLAKE2B a01828a36090e3c45d9706d0ba60a383f4eeb013405193aee221e7b2ba6db02cd928edb0f76f6cb99b02aa5c33ad811c09ba4853cde78a41adf34f8b3b54a7a4 SHA512 c2db778110b19dae3a5a6d3d7b0775287396950934ea8326789c6a93f9a6c762e3da49ada711114a5ec1cdadefb4af1dd8e4531c9053837f4b15ae62979d7b2e
+DIST rust-1.91.0_beta20251009-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B d9cf40c6b96f825ef55a39079451a327607471093c4156e01f798ef772bb130191a6a07edfbdf1ef387ab9fb4f9a6af89c574176ce17519e7953981bcef1dc43 SHA512 c6cf03b4d4f97cd7eed374d21395035111f0ab30f2e9a572ddec8a758fb37fbfbeb5552459259978a860524f692efcec9d02fe1098e9a049d210d48115795573
+DIST rust-1.91.0_beta20251009-s390x-unknown-linux-gnu.tar.xz 238057796 BLAKE2B 2ca1c62b69329698a7729c5ff4311f4a53557dedd35a8fb5b60e7a04e21f21a021aaa03d5f33d1c4e3ff7060f7738abc8186f77e284d9b44b1ca69bc7cff3d1e SHA512 0d52ba9318d60992e6e72c67e37990873226245d51e1a3feafc7a7e497847b4d3edf7fcc0abf6734f526086491811f81b539f156b2fc137df69d2db99e98af17
+DIST rust-1.91.0_beta20251009-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 31ab9e758e489ecfb7a7d8ed60ef5fed824c511169e608c39c0ff80889b8d91d00efb5ba19baae15e3ffad9d0ea5c9df891ce072a8ee571ac640d172b69a19e6 SHA512 adb05af13250a53fa87bbf8501d6f0260565f3f2123dbf14488986a274954e03234f9366c2a34d0adaa420d69993a9fda2b520b36ca58758405ab86c305bf544
+DIST rust-1.91.0_beta20251009-x86_64-unknown-linux-gnu.tar.xz 192137040 BLAKE2B dd613d631add1738d6b2f1801306547c3df27221660b604068e6060917ddc1834efda62db0afe105789bb0f7ac65abddbb27c29a3e7e314763331ea6b28ca00c SHA512 9a06f468793251ad2ee423649801dd34a6157d2e1eceb6a1e1d5587f0b715bcd3d4cb9414046ab7ef2eb82ea5a6fa9f5221bf75000ee0b3677e9a2423a0f7233
+DIST rust-1.91.0_beta20251009-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 6187a6d7fc47a750d6b4d975ae725c7ae8efdfb09471fe1596bce380fd29b694fc5033b1c57cfd182928e89585139583a8194c7e194cee4a68c876f6214c5b18 SHA512 56abc040f7cdc0277600bbe596ece010c3665830bf5c81632f0b753f79eb570648b9209cf1a550bebcfbe64dd2e2d9a4eaee9b6f9d2f3405ad2ba2490d97f34a
+DIST rust-1.91.0_beta20251009-x86_64-unknown-linux-musl.tar.xz 295109976 BLAKE2B aca3518420e8637278bb46e6ce73bb422724f207f68acbbe549aba67329e16e6a89576a66ac23eae9127bb648d731c457351a072314e3c07fbe4c3343ddbfa5e SHA512 44384a471539cc114cfb8971011ea16d55fb3edf46ad6cb14fc060df14ba8ee98b75a8ce284c3be134743522a922fe3c08d9faef5a7161b2e76de7e6206adede
+DIST rust-1.91.0_beta20251009-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 89821eaecc25e4405c32ffda2b5a2471e18b194756f949b76a050fe49b02386aee31961efa235279954ac549fdc4d2f9d885724bb6b95004e3d62647948f8b19 SHA512 c449a2af5739d230f41d556c6a341a58d5c60bd56e654f4e125fb137da75b2ece59832b36e7c86e546d54b4edf997fa979676d85fbdb13fcdd78486ee26880de
 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
@@ -712,3 +740,4 @@ DIST rust-src-1.88.0.tar.xz 3155272 BLAKE2B bca923d2264337366b8013c45f3a40cbdfc1
 DIST rust-src-1.89.0.tar.xz 3461444 BLAKE2B b1e43def4cc0f47f0e776d383954b339a62b3efa77d5db71180b7b7620a67bd2d2714afe0b08ae26a06d7d8c785eed03f545d91813d074cbe6641e883a2d40dd SHA512 055c09854e47d1bdfc7f393ac6f2783d35cb8cf13100deb227598ad91020f1d91e4cec1658d8e71db3c266dc6e267ab4172dc1007428cb05105dc4aac57bf89d
 DIST rust-src-1.90.0.tar.xz 3473408 BLAKE2B 09e9d17af7acb38b99e33874cd4b14ad7e0e15b0580846cc32bc78657432b13091bcbf3fe95494c520bcdbabd5491b9445cb3ce3177fa149d0b89991b67b06e3 SHA512 88dd1a5f1a69ab9e4586fee4a31d7dea51a664ac32b501cab771739b8127eb4ac873d2353e819ef057734522c1bcd64d664bda3d1ff957b1448b4653be766638
 DIST rust-src-1.91.0_beta20250928.tar.xz 3509016 BLAKE2B 81417db8497947d67288b1980601127cc9f737b8159e7817626fca7cb7d07fd4287fee14f0b4043c596a67d1d63b1ab9e273b6e1976f27049c86612395ee9255 SHA512 3ddd9987fac3d465b843cc05385ad482e9c18ff2c15dc2dc864fbb4988c2775766db5bec6fc35ed750ce5389d77dd9a56eafbbcb0ecdee293f5defd7e7a5ce45
+DIST rust-src-1.91.0_beta20251009.tar.xz 3508592 BLAKE2B 3f629ef1d2da676bb502172ad73313f66effc4d2173ba9591fdbb86e9bfbb2efe35a043fd5c965aa0cfa805906f53678961cb51c7f61573d53201db7caf791f3 SHA512 dacb62bbc2c6ed002ca79fe5ebd6342ae71732e94f0df20b36b77f0d361310bbefbf749c4b8fd25ecf54b4592bc5d63cea730b927278f13978553ae823cff5aa
diff --git a/dev-lang/rust-bin/rust-bin-1.91.0_beta20251009.ebuild b/dev-lang/rust-bin/rust-bin-1.91.0_beta20251009.ebuild
new file mode 100644
index 000000000000..2e4fb28bc1bc
--- /dev/null
+++ b/dev-lang/rust-bin/rust-bin-1.91.0_beta20251009.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 c92a7caa4ec6..92a01cf28566 100644
--- a/dev-lang/rust-common/Manifest
+++ b/dev-lang/rust-common/Manifest
@@ -20,3 +20,5 @@ DIST rustc-1.90.0-src.tar.xz 272348992 BLAKE2B 82dbbe3b5fe79f623c74fb81a4c4372b1
 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
+DIST rustc-1.91.0_beta20251009-src.tar.xz 270944196 BLAKE2B 5fd9843a4fb23a56e1bc6d3b815d8dca2d350006337c3626dc782b06f7eb1da0a427056f37a9b9cf06e16d55381edad37c2528f52cef31f05fb058967220d793 SHA512 7923188c85c9635700e046f0ebc1f8391ed500461537e20f6db5272fa13dcf980d67c329e2b9ef4cc4137a696784b84d4b05acbea37af6939a8844f95be2feb3
+DIST rustc-1.91.0_beta20251009-src.tar.xz.asc 801 BLAKE2B 192e516c471dbeb07bfb491beb8eb0adb70f4c1ca95cd4e90702e6e5c52e3843d1968fd9d81d6ce1bdf41177089b198ccfcc32bea5f80d4f2afdf159022649d7 SHA512 f3e3c3b81530dc08fddee190bce2c0a19df66ca5ffde32fa51d43cce9de7d6bf54598e43e8da1ef348b0f9c5a370fb248da28ecb44129c4fb99a7ece538b608f
diff --git a/dev-lang/rust-common/rust-common-1.91.0_beta20251009.ebuild b/dev-lang/rust-common/rust-common-1.91.0_beta20251009.ebuild
new file mode 100644
index 000000000000..26c4792d0fb5
--- /dev/null
+++ b/dev-lang/rust-common/rust-common-1.91.0_beta20251009.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 c6cd7343ff12..afd68d15d46e 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -18,6 +18,7 @@ DIST rust-patches-1.88.0.tar.bz2 4062 BLAKE2B 64168ffa608f2edf2e0b3d079152c3b5dd
 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 rust-patches-1.91.0_beta20251009.tar.bz2 4212 BLAKE2B a07bd0f7c4c94e1d3dd2ef08f23a40ce62e6bc7f96a9a67745de7519aa9ea7431eff7857d51722690cd9beb8738ad348a10f1ccfcd7a185ad5c82d5e09381116 SHA512 6e5065ba7d42be9646b6fe786193c9aa3f82feec7884bfc79eedb1990b2b1cb7e608af98d9993bf0f5697dae4e8ede66dcfce913365fae00dddff45928138197
 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
@@ -58,3 +59,5 @@ DIST rustc-1.90.0-src.tar.xz 272348992 BLAKE2B 82dbbe3b5fe79f623c74fb81a4c4372b1
 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
+DIST rustc-1.91.0_beta20251009-src.tar.xz 270944196 BLAKE2B 5fd9843a4fb23a56e1bc6d3b815d8dca2d350006337c3626dc782b06f7eb1da0a427056f37a9b9cf06e16d55381edad37c2528f52cef31f05fb058967220d793 SHA512 7923188c85c9635700e046f0ebc1f8391ed500461537e20f6db5272fa13dcf980d67c329e2b9ef4cc4137a696784b84d4b05acbea37af6939a8844f95be2feb3
+DIST rustc-1.91.0_beta20251009-src.tar.xz.asc 801 BLAKE2B 192e516c471dbeb07bfb491beb8eb0adb70f4c1ca95cd4e90702e6e5c52e3843d1968fd9d81d6ce1bdf41177089b198ccfcc32bea5f80d4f2afdf159022649d7 SHA512 f3e3c3b81530dc08fddee190bce2c0a19df66ca5ffde32fa51d43cce9de7d6bf54598e43e8da1ef348b0f9c5a370fb248da28ecb44129c4fb99a7ece538b608f
diff --git a/dev-lang/rust/rust-1.91.0_beta20251009.ebuild b/dev-lang/rust/rust-1.91.0_beta20251009.ebuild
new file mode 100644
index 000000000000..b84b675c5c36
--- /dev/null
+++ b/dev-lang/rust/rust-1.91.0_beta20251009.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
+}