dev-lang/rust: add 1.64.0

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

3 files changed, 810 insertions, 0 deletions

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index c74098ee411a..2dab7c6a803c 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -158,6 +158,38 @@ DIST rust-1.62.0-x86_64-unknown-linux-gnu.tar.xz 153662720 BLAKE2B ff19ebb8a0607
 DIST rust-1.62.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B a1602b9cfbdf1b66c479f13b7171cb445068b5f18eae620435b25c3ab1e762e41977e31f02158d259acf16b0c8cdf895af16d6f68904939333b030f21b6c7a01 SHA512 2d79af9fca5a7e19448aeefd330fcc436c3ecb8e617662f144b12303ef2a214a3ae3ec4d9a42f68a4d0d6e343b81b495deddf3df23031aacfbead0c97b083174
 DIST rust-1.62.0-x86_64-unknown-linux-musl.tar.xz 254266584 BLAKE2B f566cdc94726532c50726ccf081eb2b825e52a56c74eb9d9e846f9933dafedef0a8a1b7c485938f96ae9945706192218cc318750738596923329bc23ef770ce1 SHA512 9cd01f0539db8cd344e9dd39fc5ffcd5b65c9c8c95ed692b9f7c23bc19c970c9f0056f8c8bb61813f1402143177a5b1c20bf844e64af8cf0be110e17e30aa4af
 DIST rust-1.62.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 46f38806b5a6b67953c607d4a3074a9177e14245e746771d876530c398ea98019e534a22a099c087ea2386124cc952f0a488e45f8175922b19b42441d6607938 SHA512 bc30af1e75cbfc8b488782af26d91ccee6e3b3220913af8d2ca3fc6beb5790bd81e3348f8da5c0c542bd13ab6c4cee77f50f4ba0d48e9600620034acc2dafe15
+DIST rust-1.63.0-aarch64-unknown-linux-gnu.tar.xz 230083616 BLAKE2B 2b66b809d53cc971c9cd44435c10c4bf0faa20dcc3782b47955d0fac252c370c670f0adb59f51b6842b46277d584c5fd44b94202e57aed078480f5cb6952d815 SHA512 c9f7b885008c58f7aac0edd5b6cd0295d768215e2b26cb1f590206248d468fa78409f42f48d505080ee14e2a59dd887cfc564db5a41e91ed36d738a90961f89e
+DIST rust-1.63.0-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B a323669f0587c9785c587ac0eac72915e421a61d2b5252c2dcc7f637176d5d425fc8cbcfa6ef848fd0d7acfa17cd430e4d42e8c03729c563dda59aa13e6d5c5b SHA512 be2e1eff9228576b66e0a0434e1edbb4525d0ef66743082afef1ef55565e312e63fed7274d01298128fda0c7ab63827d5aed90f50e184582781a4e10ee311de1
+DIST rust-1.63.0-aarch64-unknown-linux-musl.tar.xz 224541836 BLAKE2B b32b7886ddc5da3af0c6e394ecb167288897b2c44b0108e33aeabb3842ff563c769e635413b092a36246bbcf137d692e94c6ce66cccad34c7e728c4cf4af7bc2 SHA512 e462c8b94defc5ac5dfe923c3a6273c3d414cf576840d46a680a4f333bc34fea874c4ec4363c4e1891a6fe95087bf4a68bba7f316bfed9db6313be989afd7428
+DIST rust-1.63.0-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B ccac24e85deb6089468b763bce6cd54ec1c5ce506d10c8e84d3e8b0c9ee21946ac575a4aab5205c5a2d8328488641806a7dc1b15bd8cc48f3701630f223580f4 SHA512 9d41f34e507271e26e6ff7ce03d6a215a99971df77b246fa64b3518d70c2ec82142e96c4d0cf9641405065ec672f663316a93fe0e9183bd1e8f5af4de1ef41f1
+DIST rust-1.63.0-arm-unknown-linux-gnueabi.tar.xz 203850320 BLAKE2B 2a0f4e195d6e7ca66119b2bd45d58127b6aa305c77349c06d8ee109066ede59288ce067e222fca12f1414224a74ec9f33e7de1a18bf7b1e91e216e852e574a90 SHA512 d55ee6201bc4c3cd698396f08d4247b7578778b3c82da8ef496512e0f8cb1758009af6286230a1b26849b5f27101a242d7e04851ae41a41f7547589103f5c0ce
+DIST rust-1.63.0-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B 26bdf2e38262d3e4b23c72f86325dd1275c08b5ccccd99c82b91a05cf800e3e6a2500bdc6d89a3582311292f6ba1ddd65b8a081b608c83adcb39faa708f8376d SHA512 0f1213cf05bbbf659103c7178f20780fa3ef807cd03417edcb901d6560411c3f96bfeeb0dcf555460675573cfb9d402fa3882d787015ecfbf83765ae9fc35325
+DIST rust-1.63.0-arm-unknown-linux-gnueabihf.tar.xz 204273564 BLAKE2B 4a3730dc3d1cc08c8a0a687328e19e7a78265eb81cc1a3312cc547bd4823951c28ab57ac87919aab346994a6f96ce9803f7429c6b1831e4fdb3a7f7f086a2a87 SHA512 d53bc819c7ca2e5fc116fec5a731d280ac701f19fd9a8707ee5e69fdc41544d3dce17f8cd61f9ad0b59a89409c9859634e5d91444a0361add69c36c3f47a379d
+DIST rust-1.63.0-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B e71f5d6f404a408774f6246fe72596c59255ba1f1b52c4ef6fdef08da63178fefa46966370a1f4e04b95a68b119f166e01d2d2d347f9e4517908e87146a56d83 SHA512 c70a350de8d378ed8dcec42d697143e4cce18dfd176b4fbcea25e7c608ff3db51642ab1be3b13d277d7eeec5a0262aaf9c38527f7f14c02fc64f760d6438efb2
+DIST rust-1.63.0-armv7-unknown-linux-gnueabihf.tar.xz 209545116 BLAKE2B 2cb5610fc665f50505fa8b0d18b88cf79abca6a6b8503d46f76fc58b74e7d58e3b7aa1a790e7ba555b250d0f0bd48acd176ff1cf463eb7f37b34780b04b2c838 SHA512 e809ac29a9b24c82f7d950ebbad5d3c01dafba9554c55716a28e728b0218c6f8b3b7f1e31c277be3946da1a0e4228717d7a1a63db66716c19a79b2c5ac11fb92
+DIST rust-1.63.0-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B c6f1e717a7cb746dfe3d9b109d77bdf7cd918c2d60491d83b2d7cebf412140b9cae257df850587c16a7b1c8faa16ef029f628c6c2c7e5b6f1d088e1a03c33899 SHA512 c832521179dd7b7cda0e979bfbfe491d3a255cb47f03fe113ac1290540fdc7134ea08a2815c9ec422919579fff3db995aa0e7f72249e2d00d4790a58f1142680
+DIST rust-1.63.0-i686-unknown-linux-gnu.tar.xz 224058112 BLAKE2B 6a83fa3bd0fe2a7f0cdbf8b8c7a6662235f9690177c9ed06af7be969b08959d2c58a8689247cd61a9d9ff765e6946f2bb12b9d278a0701d4764bdf8d141dd4cf SHA512 8441267b1fb1cec3c9a2e226f6f6c5d66cdf9fa2026df272374432c501aefb515b8d21266ddee5297f8570de72c55fa5bf485c5a9790ad7687e5ad1811c72cad
+DIST rust-1.63.0-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 5c2e92bdf15c1dbfdb2715fd4b1874a270e21bedad1c84967c4bf92a2818935dfdfc48673e3b52d991ae9557378a62a5905e8f3005f1bf12f6eb93415cc47b1c SHA512 f42f5e65f76c72f7dd6bfdbc730b3c4da50d1444df2b1282334a6a3e6cb0af175536b037c6a5f1fc4000640756e57a3176315e288fe23ba56abe8a6f4c763525
+DIST rust-1.63.0-mips-unknown-linux-gnu.tar.xz 161238712 BLAKE2B a60f7b8a190fb90e123c18fafde9fbfa6e27bedc849175351ec9871ea705c2a54eae59b5597e71e20d2e63c73065717ccb56eea59ed46d12c13ae4fe8125ae5e SHA512 dc7ec2f92bdcd52af83c71b07df0f31187b8f195e9900ba0ffa3688175cdd22e81c34ef45b5e84c2cb9b47adf990de20a2c9296b46c17cc06176c19e956923cb
+DIST rust-1.63.0-mips-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 7803d7c07170d1a9af4e83add8f9b42caec19f5c8af4163dd541069f8b3f86087a09e4c3447c0faba19d1c2173c2411503856254b34d7c57320be250dd5b72ab SHA512 a9e80d1417353298656b99137a20478265458c95914c9d547bb57905ac9b654127fbf6e7a4292bfe74afd0aaae20730a126910383822d0c75b2da164bf60341e
+DIST rust-1.63.0-mips64-unknown-linux-gnuabi64.tar.xz 166872588 BLAKE2B 3a052d6f4196cbf55feb173e36c22cd3316abf6081d6a94dd6a7ab3a675f447471555b721e162ca15cbc485c4571b647a9257649a1d23b69b9a0ef262827b2d7 SHA512 db23d30021d6f8a5fbec50b6dac13264e3aac003ff0604185999318b47370b4476ce9e6034ab9ab5f4fba03b393898968b8c9a698f2b71bc1f58b452b030d1c4
+DIST rust-1.63.0-mips64-unknown-linux-gnuabi64.tar.xz.asc 801 BLAKE2B f30125c52883076251a22bb8a90fdd642167ebd0688ceb8e349555491824cffbc0873526b0269419fbc6421c5976aab18f5c3bbf35b997b4afc5d48b1e080c03 SHA512 d86940292aa891f7f0fc10d14b5ee386f8481448b6ed26bd8aabf21a7341c0916b08eae0e26bcd1dcc0fad1fbc0d216a767d8eba3dcc2ed47c4bb0aab107ab80
+DIST rust-1.63.0-mipsel-unknown-linux-gnu.tar.xz 165974484 BLAKE2B 4dcbcb3e6255c9266c4476e62aa9a6d31c4ba48b9a830789d9cf245002b4fec762f86fb6713507dfac8227a4e9da32347e5ce9d029d53220f8b3037e2dcf47c5 SHA512 2fb7e3bdc925abfc8efc4ee30f19bf6eb5d5afc803332059cf855eee7ba7c6a85c578701798fd1b9f9b07a4a7b091283406ca02c797fdafc9e437b0ea85de8be
+DIST rust-1.63.0-mipsel-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B c42a76a7902234490f33b520494d85c5000592cb781d97c9def132fce39f3e582cfbe6c868a7dc494ce550228ee0c4195500a17489323c22f9aecc74d4915135 SHA512 62fa9ace175d1359ae61229e6618972ff1db42b8e826113af247fccd67c4f49dd4ad4d93eefa3801a20a164332404f9fa5002c75ede2b81eb277e64d1a29396a
+DIST rust-1.63.0-powerpc-unknown-linux-gnu.tar.xz 184571616 BLAKE2B 452ee709ba25db4569e4ed20f88ea4a14c8b45c85803b065b5bc6e005473c02dc745ae531b8e0c7642dbe50880dd2f9d359520a3f0fc09628327613ed706dd38 SHA512 2dd3ab750044501e882442e54fc78fe73f36758458c6107df7afd55f8333c01a2e69bde181ca1bf3a1529a3a2bf616d4f69708081c494cc1781be5fd2a58df29
+DIST rust-1.63.0-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 13796a48f4ae628c2242ce4632ebdf4106899aa0713b469e4ad4457f0bad23638626bdf6de6a2f6d1d84b8408872c5a4cc97ae4fa0409458d8bec6eb43adf9a5 SHA512 813601cbe547add62345d4a9ed1a31e364310724c2bddf9f76404095b9fa1ab3c33f9480953d22136635afc8d6f7d4a9df2839f2e3d9d5f74a6594ae3d7f9537
+DIST rust-1.63.0-powerpc64-unknown-linux-gnu.tar.xz 192446060 BLAKE2B 28a6c8a94caab7d23d203e55ad1ad1b689f07ea9d4bdb0a618833b36378ea731ca85f906c8fe0de2727001471fef9b30b8f12a241d9cd257851b2b0a8a94f15b SHA512 42a39558352c1cbdf7c9e9fa1aecae160b43e1bf74ace0df844d95bd43743642be7107bbb60a574de7219da355cf64939509d4f028f32d555a90900e962df6e8
+DIST rust-1.63.0-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B ed2a82a7a04f1d831480f7aa32ef8f0524424aec50ae8f75d2c186937b1c3e3bd953306dafa026a492b1792043ccace535f26b4911691d58b27d799585d2f024 SHA512 c740ad1bd86074b27c233167e2a66b20a9e79d2505e6e00b38a1f8053f136218dc21618968c4d709c8c2936311449187ce15d16d078832b7107303b56ba9c55e
+DIST rust-1.63.0-powerpc64le-unknown-linux-gnu.tar.xz 202613736 BLAKE2B eb0fcc0c0a615dc1d48591e9d34bdfcdac5adbe2b5953faa8e11b0147a09a56fac3161e2c0f5c4c0d399a3a9431effdc84b938f00469f262c24f06d1c0489a08 SHA512 9c9927b9c22d8561a9b45b237e64d3afc1725cace695fa6623db65731e9ec2cd56e105949d866f5feb62c6ec717852461ef0153fc9d028fbc5323ef231eba69e
+DIST rust-1.63.0-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B efdb321cae9af3c3ff8854b52281211c80833f30785004c70df79bb73b094a21fd63687372dd1cb192a2547fcb7d8bbc7c4ae27851695aecce71e085bad34396 SHA512 c876eedce00ef013d2af89218a6ab5108d9ab5e3a60d7afc5afacd39e5a017ab99ef12a0ff954e8861c42a3ff9bc9030077bd9801f575620e015590a82ea0f25
+DIST rust-1.63.0-riscv64gc-unknown-linux-gnu.tar.xz 195670272 BLAKE2B 487ce5fd3dfa59914264953792d8f44433d88d9ca29bb647effda24e170a55470cca35fe653f6706f78e6b0c70265d0735585b17d7108bd62b71cd84e7f1312a SHA512 b6da4a3651b205f819e002157d196b014e4ad9923f854271dd6b306d8c69dc3d619b9a3e51c56ea2d2402566fac775d42719a67952c8f3e93933594aadc67831
+DIST rust-1.63.0-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 822415e792104724494f29dee1a9730fc0328e00ee613c163d3cc8298fd3f85465d5c31d2c94b479271dde0721690c78056ec3828e14087a5c5b82c0dee0d4b8 SHA512 9b2d8239708baefb075470aeb37d5b62fb934d4074c745d89467d4f9efb91c10b7c999b726c4edef720b58e95e525cc72fa20d4cfbe6d0ba1352f5fca5d1e195
+DIST rust-1.63.0-s390x-unknown-linux-gnu.tar.xz 219060812 BLAKE2B 8087db6ae903fed440bddfe4a07fee35292b16fdb847155cf584dc1a7adbeb4a8f55bd17afeb015dba53c29a05bfbd3f5373b2e30018e4a56d400fdbd1cedc3f SHA512 11bed7ebd8bf977aa34ef9f9dabee8428baede670885b4f268335fe87b81e41b426e94ca60db218e82be2e6e73ec33123c77922bfee7ae9373bfd9227417214c
+DIST rust-1.63.0-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 3f656cd12927155b4debb68e821d9db3fa880ee49c557246c34390c44ab6e2c456d8b29b1c15c933de868d0884a83b2b419501af06d4244830d59032d5ce82a5 SHA512 521f95024624200c67d556c533d307468007c01a7de37cbd65d4af949275933cfee51334338838f5e4a9136a363b65bec47bcf399ebacff7f5558ae59c1d006c
+DIST rust-1.63.0-x86_64-unknown-linux-gnu.tar.xz 155435832 BLAKE2B d5427a7380a214a7b1ad2f075b162f6f49056a96a3a1153df794025d9a1456083dd3e7ab9eb3c71982982701cc1f8a93405640f8b622fde60819ee022413446f SHA512 9e538980b6a42d14b7ec08bd1a3ddecfea24e5d3068226edf212486bb5a20bfcac22f1f917a06536f6f26dcffedd65c7049870bc3d70b9c972075bcbe58eb8d9
+DIST rust-1.63.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 0b4465f1afbf2f5f9135cf722632ffd7df9ef4e92c65e9ef6d4aede5b1ff392973949a6737e88685033ee571dfefe9b099d477480d7aaec2a329926a87a6f5b2 SHA512 0c8d339204a23000cdebfaee7faaa576673bd8d98111ea187f5e19f03f7231f3bbec8158c5b04d8d903877f1addeebc9f4fdc6b1de0fc0ad2995742987eafb1c
+DIST rust-1.63.0-x86_64-unknown-linux-musl.tar.xz 254705824 BLAKE2B 8d35bbc3ffa53b52d7d7aacc51b90283d9703a40d5623c184a79195799aa3768a34942e235e2002a0b72d76110c0d66fb5ea403f9d0c81021ead52cea2a51e40 SHA512 995530319a14bd6674d5be145e777b7fd482953e62ecf672a29e2c5b4bf567e010d7db4d5c6acef1603d79135e74f21955d9fc13ed7e1c33279d05aae39bdfec
+DIST rust-1.63.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 2681d77ffb4c40305ff532f975a9e31ea72a50fa2a25661ecd721a50f081a4ab3a659b2a06500540dbf21357af098add2a4a4dec63f50d5b3ed4c041fe4b49dd SHA512 012b2cb560e0d2514eb288960e6a3703f9be9a7e611b915f07f1150645b8527fe653d3fbb795ad62c5e431cb4ca175a915710913eb2b9f2912c188d17baa0d14
 DIST rustc-1.59.0-src.tar.xz 128942756 BLAKE2B b28114f14c9a0fec7db56fde79a985360fd8438c3b14eede49ed12e540c2636be960d0fd800c569af193886ac76fe8bf604d5dae59214ae08cb0cc6cc0ca404e SHA512 acace866871d13a55d365f65d7e15c192c3cd33096862571df6317e066b7474d668b95ae281e0244967778c05f1e33966c3c55616218bd25d3770a2b2d4f0365
 DIST rustc-1.59.0-src.tar.xz.asc 801 BLAKE2B 061701c4fdbde930798f9f938ca3642204ae4a2ad9396937ca7d604268813d6d68f4979f20d35abdbbfeec0bb389acd86c9d3d84256db85861f6b11e3dbef80e SHA512 1b90bc01f9d68ba1f70591c4ae707295d7727b790d170a0b757d654684e59d3c26c45b66a21f9ac762debb6867494660c73daaf10be9bd567a38be44c0009f72
 DIST rustc-1.60.0-src.tar.xz 136183048 BLAKE2B 8030f32c21f81af6abc7a282aab1189cb7d680c6bce58c119a1beaad71a3eeb36a696eef46a22d366e2c41a2f9182a9a5aa527426f2c8db05278184c37297dd0 SHA512 d0c113e8c2c67bf10773c9403dc4c4700c4deb2fb287bfec51e565d3473d2b481d8ae2c90b272cd67b3a87d7443ea25a34c7b40ba8cd7106bf5d71126ab141c3
@@ -170,3 +202,5 @@ DIST rustc-1.62.1-src.tar.xz 135644156 BLAKE2B ff8428362153770c57d53cb7eef07b759
 DIST rustc-1.62.1-src.tar.xz.asc 801 BLAKE2B dd0e917f8b587eb8318a9c820df5ee9a052f14e7dea05d8afcb3cf687fa2e362e6d2f4d20fa94a19bdf97227c9ef29548a6e267ffd9113bfdc36cc42f341d8b8 SHA512 698bfd419c218a6cccce04869279708cf6084adc464a64d7dd1c981c0577249cd06b4de132634085c792c838aa1e1beaa11a5a06ea0e5f4c1a6f4e28afe65a3c
 DIST rustc-1.63.0-src.tar.xz 136597192 BLAKE2B 52eb64ee11e7d9724a4c2654f7eea13521959ac5e04a4925eed5c89ec3661a7827146d6f9a9d05c98466bd4b74393af7bb18d9f418c785924f559833434dfe38 SHA512 0dd3cd1546bd9c1438afe0c4694e1ed80507f6b437674682c0474e13f83457e9ced4560ddeee58602e01837140f9e34a9e24c6828643dd6f613e07755af6997c
 DIST rustc-1.63.0-src.tar.xz.asc 801 BLAKE2B b6c133768e368a7aeb0a4612a4c824d13f91ccdca6660feb5774ed6d79537084020780532c882ae3c9e4b6be3d36ceb0652eb134a580293ba8d8be74c4ba3c6e SHA512 f8807d46b9a3ca2a15a60f8062d63b3ee6e3210657cc752c948b3c7aa1626ec63cbd57529d010ad33f07ac47cf70dbf2cb50f200587338f77c631fc9e6786b17
+DIST rustc-1.64.0-src.tar.xz 137841332 BLAKE2B 8acd9e0a4632ba2114018a5cd3f2d544324c601c246658f60a9e0be513c40375434d0a416f0bfd4d24493eae3fec7c9f5bb52d008c88cde14de503a3b6873dd1 SHA512 919f40acd8c6eaaef399aa3248503bea19feb96697ab221aaede9ee789ce340b47cb899d1e0e41a31e5d7756653968a10d2faaa4aee83294c9f1243949b43516
+DIST rustc-1.64.0-src.tar.xz.asc 801 BLAKE2B 69f7bd7600d99794859c6fad4b44f0e98868e4e16041d6fe81d9d09a8435c75abac67a735adb0b81a2d9f85651841d404bc1ef4cd64fccd75e8a25d6d95729d0 SHA512 a831e3941849add1082c5b47b619ea87405b875d6eeb90a35f42742a511d124c29503debd17dcc8c6aa9e03a754ab51c3a15e99192bdd0dd1b8a59af9b6eb0b8
diff --git a/dev-lang/rust/metadata.xml b/dev-lang/rust/metadata.xml
index 99bf9058f4f2..f64700dcc740 100644
--- a/dev-lang/rust/metadata.xml
+++ b/dev-lang/rust/metadata.xml
@@ -18,6 +18,7 @@
 		<flag name="profiler">Build the profiler runtime and rust-demangler tool (needed for '-C profile-generate' or '-C instrument-coverage' codegen opts)</flag>
 		<flag name="rls">Install rls, Rust Language Server (used with IDEs supporting RLS protocol)</flag>
 		<flag name="rustfmt">Install rustfmt, Rust code formatter</flag>
+		<flag name="rust-analyzer">Install rust-analyzer, A Rust compiler front-end for IDEs (like rls)</flag>
 		<flag name="rust-src">Install rust-src, needed by developer tools and for build-std (cross)</flag>
 		<flag name="system-bootstrap">Bootstrap using installed rust compiler</flag>
 		<flag name="system-llvm">Use the system LLVM installation</flag>
diff --git a/dev-lang/rust/rust-1.64.0.ebuild b/dev-lang/rust/rust-1.64.0.ebuild
new file mode 100644
index 000000000000..b979489c2f06
--- /dev/null
+++ b/dev-lang/rust/rust-1.64.0.ebuild
@@ -0,0 +1,775 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..11} )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing \
+	multilib multilib-build python-any-r1 rust-toolchain toolchain-funcs verify-sig
+
+if [[ ${PV} = *beta* ]]; then
+	betaver=${PV//*beta}
+	BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+	MY_P="rustc-beta"
+	SLOT="beta/${PV}"
+	SRC="${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz"
+else
+	ABI_VER="$(ver_cut 1-2)"
+	SLOT="stable/${ABI_VER}"
+	MY_P="rustc-${PV}"
+	SRC="${MY_P}-src.tar.xz"
+	KEYWORDS="~amd64 ~arm ~arm64 ~mips ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+RUST_STAGE0_VERSION="1.$(($(ver_cut 2) - 1)).0"
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+SRC_URI="
+	https://static.rust-lang.org/dist/${SRC}
+	verify-sig? ( https://static.rust-lang.org/dist/${SRC}.asc )
+	!system-bootstrap? ( $(rust_all_arch_uris rust-${RUST_STAGE0_VERSION}) )
+"
+
+# keep in sync with llvm ebuild of the same version as bundled one.
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430
+	NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/(-)?}
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD-1 BSD-2 BSD-4 UoI-NCSA"
+
+IUSE="clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind miri nightly parallel-compiler profiler rls rustfmt rust-analyzer rust-src system-bootstrap system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# List all the working slots in LLVM_VALID_SLOTS, newest first.
+LLVM_VALID_SLOTS=( 14 )
+LLVM_MAX_SLOT="${LLVM_VALID_SLOTS[0]}"
+
+# splitting usedeps needed to avoid CI/pkgcheck's UncheckableDep limitation
+# (-) usedep needed because we may build with older llvm without that target
+LLVM_DEPEND="|| ( "
+for _s in ${LLVM_VALID_SLOTS[@]}; do
+	LLVM_DEPEND+=" ( "
+	for _x in ${ALL_LLVM_TARGETS[@]}; do
+		LLVM_DEPEND+="
+			${_x}? ( sys-devel/llvm:${_s}[${_x}(-)] )"
+	done
+	LLVM_DEPEND+=" )"
+done
+unset _s _x
+LLVM_DEPEND+=" )
+	<sys-devel/llvm-$(( LLVM_MAX_SLOT + 1 )):=
+	wasm? ( sys-devel/lld )
+"
+
+# to bootstrap we need at least exactly previous version, or same.
+# most of the time previous versions fail to bootstrap with newer
+# for example 1.47.x, requires at least 1.46.x, 1.47.x is ok,
+# but it fails to bootstrap with 1.48.x
+# https://github.com/rust-lang/rust/blob/${PV}/src/stage0.txt
+RUST_DEP_PREV="$(ver_cut 1).$(($(ver_cut 2) - 1))*"
+RUST_DEP_CURR="$(ver_cut 1).$(ver_cut 2)*"
+BOOTSTRAP_DEPEND="||
+	(
+		=dev-lang/rust-"${RUST_DEP_PREV}"
+		=dev-lang/rust-bin-"${RUST_DEP_PREV}"
+		=dev-lang/rust-"${RUST_DEP_CURR}"
+		=dev-lang/rust-bin-"${RUST_DEP_CURR}"
+	)
+"
+
+BDEPEND="${PYTHON_DEPS}
+	app-eselect/eselect-rust
+	|| (
+		>=sys-devel/gcc-4.7
+		>=sys-devel/clang-3.5
+	)
+	system-bootstrap? ( ${BOOTSTRAP_DEPEND} )
+	!system-llvm? (
+		>=dev-util/cmake-3.13.4
+		dev-util/ninja
+	)
+	test? ( sys-devel/gdb )
+	verify-sig? ( sec-keys/openpgp-keys-rust )
+"
+
+DEPEND="
+	>=app-arch/xz-utils-5.2
+	net-misc/curl:=[http2,ssl]
+	sys-libs/zlib:=
+	dev-libs/openssl:0=
+	system-llvm? (
+		${LLVM_DEPEND}
+		llvm-libunwind? ( sys-libs/llvm-libunwind:= )
+	)
+	!system-llvm? (
+		!llvm-libunwind? (
+			elibc_musl? ( sys-libs/libunwind:= )
+		)
+	)
+"
+
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+	sys-apps/lsb-release
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+	miri? ( nightly )
+	parallel-compiler? ( nightly )
+	rls? ( 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}/${PV}/bin/.*
+	usr/lib/${PN}/${PV}/libexec/.*
+	usr/lib/${PN}/${PV}/lib/lib.*.so
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/.*
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_SONAME="
+	usr/lib/${PN}/${PV}/lib/lib.*.so.*
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_PRESTRIPPED="
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/rust-llvm-dwp
+"
+
+# An rmeta file is custom binary format that contains the metadata for the crate.
+# rmeta files do not support linking, since they do not contain compiled object files.
+# so we can safely silence the warning for this QA check.
+QA_EXECSTACK="usr/lib/${PN}/${PV}/lib/rustlib/*/lib*.rlib:lib.rmeta"
+
+# causes double bootstrap
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/rust.asc
+
+PATCHES=(
+	"${FILESDIR}"/1.55.0-ignore-broken-and-non-applicable-tests.patch
+	"${FILESDIR}"/1.62.1-musl-dynamic-linking.patch
+	"${FILESDIR}"/1.61.0-gentoo-musl-target-specs.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+toml_usex() {
+	usex "${1}" true false
+}
+
+bootstrap_rust_version_check() {
+	# never call from pkg_pretend. eselect-rust may be not installed yet.
+	[[ ${MERGE_TYPE} == binary ]] && return
+	local rustc_wanted="$(ver_cut 1).$(($(ver_cut 2) - 1))"
+	local rustc_toonew="$(ver_cut 1).$(($(ver_cut 2) + 1))"
+	local rustc_version=( $(eselect --brief rust show 2>/dev/null) )
+	rustc_version=${rustc_version[0]#rust-bin-}
+	rustc_version=${rustc_version#rust-}
+
+	[[ -z "${rustc_version}" ]] && die "Failed to determine rust version, check 'eselect rust' output"
+
+	if ver_test "${rustc_version}" -lt "${rustc_wanted}" ; then
+		eerror "Rust >=${rustc_wanted} is required"
+		eerror "please run 'eselect rust' and set correct rust version"
+		die "selected rust version is too old"
+	elif ver_test "${rustc_version}" -ge "${rustc_toonew}" ; then
+		eerror "Rust <${rustc_toonew} is required"
+		eerror "please run 'eselect rust' and set correct rust version"
+		die "selected rust version is too new"
+	else
+		einfo "Using rust ${rustc_version} to build"
+	fi
+}
+
+pre_build_checks() {
+	local M=8192
+	# multiply requirements by 1.3 if we are doing x86-multilib
+	if use amd64; then
+		M=$(( $(usex abi_x86_32 13 10) * ${M} / 10 ))
+	fi
+	M=$(( $(usex clippy 128 0) + ${M} ))
+	M=$(( $(usex miri 128 0) + ${M} ))
+	M=$(( $(usex rls 512 0) + ${M} ))
+	M=$(( $(usex rustfmt 256 0) + ${M} ))
+	# add 2G if we compile llvm and 256M per llvm_target
+	if ! use system-llvm; then
+		M=$(( 2048 + ${M} ))
+		local ltarget
+		for ltarget in ${ALL_LLVM_TARGETS[@]}; do
+			M=$(( $(usex ${ltarget} 256 0) + ${M} ))
+		done
+	fi
+	M=$(( $(usex wasm 256 0) + ${M} ))
+	M=$(( $(usex debug 2 1) * ${M} ))
+	eshopts_push -s extglob
+	if is-flagq '-g?(gdb)?([1-9])'; then
+		M=$(( 15 * ${M} / 10 ))
+	fi
+	eshopts_pop
+	M=$(( $(usex system-bootstrap 0 1024) + ${M} ))
+	M=$(( $(usex doc 256 0) + ${M} ))
+	CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+llvm_check_deps() {
+	has_version -r "sys-devel/llvm:${LLVM_SLOT}[${LLVM_TARGET_USEDEPS// /,}]"
+}
+
+pkg_pretend() {
+	pre_build_checks
+}
+
+pkg_setup() {
+	pre_build_checks
+	python-any-r1_pkg_setup
+
+	export LIBGIT2_NO_PKG_CONFIG=1 #749381
+
+	use system-bootstrap && bootstrap_rust_version_check
+
+	if use system-llvm; then
+		llvm_pkg_setup
+
+		local llvm_config="$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+		export LLVM_LINK_SHARED=1
+		export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" --libdir)"
+	fi
+}
+
+esetup_unwind_hack() {
+	# https://bugs.gentoo.org/870280
+	# this is a hack needed to bootstrap with libgcc_s linked tarball on llvm-libunwind system.
+	# it should trigger for internal bootstrap or system-bootstrap with rust-bin.
+	# the whole idea is for stage0 to bootstrap with fake libgcc_s.
+	# final stage will receive -L${T}/lib but not -lgcc_s args, producing clean compiler.
+	local fakelib="${T}/fakelib"
+	mkdir -p "${fakelib}" || die
+	# we need both symlinks, one for cargo runtime, other for linker.
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so.1" || die
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so" || die
+	export LD_LIBRARY_PATH="${fakelib}"
+	export RUSTFLAGS+=" -L${fakelib}"
+	# this is a literally magic variable that gets through cargo cache, without it some
+	# crates ignore RUSTFLAGS.
+	# this variable can not contain leading space.
+	export MAGIC_EXTRA_RUSTFLAGS+="${MAGIC_EXTRA_RUSTFLAGS:+ }-L${fakelib}"
+}
+
+src_prepare() {
+	if ! use system-bootstrap; then
+		has_version sys-devel/gcc || esetup_unwind_hack
+		local rust_stage0_root="${WORKDIR}"/rust-stage0
+		local rust_stage0="rust-${RUST_STAGE0_VERSION}-$(rust_abi)"
+
+		"${WORKDIR}/${rust_stage0}"/install.sh --disable-ldconfig \
+			--without=rust-docs --destdir="${rust_stage0_root}" --prefix=/ || die
+	fi
+
+	default
+}
+
+src_configure() {
+	use system-llvm && filter-flags '-flto*' # https://bugs.gentoo.org/862109
+
+	local rust_target="" rust_targets="" arch_cflags use_libcxx="false"
+	local chost_target="$(get_abi_CHOST ${v##*.})"
+
+	# Collect rust target names to compile standard libs for all ABIs.
+	for v in $(multilib_get_enabled_abi_pairs); do
+		rust_targets+=",\"$(rust_abi ${chost_target})\""
+	done
+	if use elibc_musl; then
+		# we also want to build our -gentoo- target on musl, in addition to
+		# -unknown- one provided by upstream
+		rust_targets+="${rust_targets//-unknown-/-gentoo-}"
+	fi
+	if use wasm; then
+		rust_targets+=",\"wasm32-unknown-unknown\""
+		if use system-llvm; then
+			# un-hardcode rust-lld linker for this target
+			# https://bugs.gentoo.org/715348
+			sed -i '/linker:/ s/rust-lld/wasm-ld/' compiler/rustc_target/src/spec/wasm_base.rs || die
+		fi
+	fi
+	rust_targets="${rust_targets#,}"
+
+	local tools='"cargo"'
+	use clippy && tools+=',"clippy"'
+	use miri && tools+=',"miri"'
+	use profiler && tools+=',"rust-demangler"'
+	use rls && tools+=',"rls","analysis"'
+	use rustfmt && tools+=',"rustfmt"'
+	use rust-analyzer && tools+=',"rust-analyzer"'
+	use rust-src && tools+=',"src"'
+
+	local rust_stage0_root
+	if use system-bootstrap; then
+		local printsysroot
+		printsysroot="$(rustc --print sysroot || die "Can't determine rust's sysroot")"
+		rust_stage0_root="${printsysroot}"
+	else
+		rust_stage0_root="${WORKDIR}"/rust-stage0
+	fi
+	# in case of prefix it will be already prefixed, as --print sysroot returns full path
+	[[ -d ${rust_stage0_root} ]] || die "${rust_stage0_root} is not a directory"
+
+	rust_target="$(rust_abi)"
+
+	# https://bugs.gentoo.org/732632
+	if tc-is-clang; then
+		local clang_slot="$(clang-major-version)"
+		if { has_version "sys-devel/clang:${clang_slot}[default-libcxx]" || is-flagq -stdlib=libc++; }; then
+			use_libcxx="true"
+		fi
+	fi
+
+	local cm_btype="$(usex debug DEBUG RELEASE)"
+	cat <<- _EOF_ > "${S}"/config.toml
+		changelog-seen = 2
+		[llvm]
+		download-ci-llvm = false
+		optimize = $(toml_usex !debug)
+		release-debuginfo = $(toml_usex debug)
+		assertions = $(toml_usex debug)
+		ninja = true
+		targets = "${LLVM_TARGETS// /;}"
+		experimental-targets = ""
+		link-shared = $(toml_usex system-llvm)
+		$(if [[ ${use_libcxx} == true ]]; then
+			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)
+		[llvm.build-config]
+		CMAKE_VERBOSE_MAKEFILE = "ON"
+		CMAKE_C_FLAGS_${cm_btype} = "${CFLAGS}"
+		CMAKE_CXX_FLAGS_${cm_btype} = "${CXXFLAGS}"
+		CMAKE_EXE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_MODULE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_SHARED_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_STATIC_LINKER_FLAGS_${cm_btype} = "${ARFLAGS}"
+		[build]
+		build-stage = 2
+		test-stage = 2
+		doc-stage = 2
+		build = "${rust_target}"
+		host = ["${rust_target}"]
+		target = [${rust_targets}]
+		cargo = "${rust_stage0_root}/bin/cargo"
+		rustc = "${rust_stage0_root}/bin/rustc"
+		rustfmt = "${rust_stage0_root}/bin/rustfmt"
+		docs = $(toml_usex doc)
+		compiler-docs = false
+		submodules = false
+		python = "${EPYTHON}"
+		locked-deps = true
+		vendor = true
+		extended = true
+		tools = [${tools}]
+		verbose = 2
+		sanitizers = false
+		profiler = $(toml_usex profiler)
+		cargo-native-static = false
+		[install]
+		prefix = "${EPREFIX}/usr/lib/${PN}/${PV}"
+		sysconfdir = "etc"
+		docdir = "share/doc/rust"
+		bindir = "bin"
+		libdir = "lib"
+		mandir = "share/man"
+		[rust]
+		# https://github.com/rust-lang/rust/issues/54872
+		codegen-units-std = 1
+		optimize = true
+		debug = $(toml_usex debug)
+		debug-assertions = $(toml_usex debug)
+		debug-assertions-std = $(toml_usex debug)
+		debuginfo-level = $(usex debug 2 0)
+		debuginfo-level-rustc = $(usex debug 2 0)
+		debuginfo-level-std = $(usex debug 2 0)
+		debuginfo-level-tools = $(usex debug 2 0)
+		debuginfo-level-tests = 0
+		backtrace = true
+		incremental = false
+		default-linker = "$(tc-getCC)"
+		parallel-compiler = $(toml_usex parallel-compiler)
+		channel = "$(usex nightly nightly stable)"
+		description = "gentoo"
+		rpath = false
+		verbose-tests = true
+		optimize-tests = $(toml_usex !debug)
+		codegen-tests = true
+		dist-src = false
+		remap-debuginfo = true
+		lld = $(usex system-llvm false $(toml_usex wasm))
+		# only deny warnings if doc+wasm are NOT requested, documenting stage0 wasm std fails without it
+		# https://github.com/rust-lang/rust/issues/74976
+		# https://github.com/rust-lang/rust/issues/76526
+		deny-warnings = $(usex wasm $(usex doc false true) true)
+		backtrace-on-ice = true
+		jemalloc = false
+		[dist]
+		src-tarball = false
+		compression-formats = ["xz"]
+	_EOF_
+
+	for v in $(multilib_get_enabled_abi_pairs); do
+		rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+		arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+		export CFLAGS_${rust_target//-/_}="${arch_cflags}"
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${rust_target}]
+			ar = "$(tc-getAR)"
+			cc = "$(tc-getCC)"
+			cxx = "$(tc-getCXX)"
+			linker = "$(tc-getCC)"
+			ranlib = "$(tc-getRANLIB)"
+			llvm-libunwind = "$(usex llvm-libunwind $(usex system-llvm system in-tree) no)"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		# by default librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
+		# but we patch it and set to false here as well
+		# also we enable extra -gentoo- vendor triplet target with same settings as above
+		# musl-sysroot needs to be defined because rust treats it like an extra cross target
+		# so HOST still stays -unknown-, but --tagrget xx-gentoo-linux-musl will have stdlib.
+		if use elibc_musl; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				crt-static = false
+				[target.${rust_target//-unknown-/-gentoo-}]
+				musl-root = "${ESYSROOT}/usr"
+				ar = "$(tc-getAR)"
+				cc = "$(tc-getCC)"
+				cxx = "$(tc-getCXX)"
+				linker = "$(tc-getCC)"
+				ranlib = "$(tc-getRANLIB)"
+				llvm-libunwind = "$(usex llvm-libunwind $(usex system-llvm system in-tree) no)"
+			_EOF_
+			if use system-llvm; then
+				cat <<- _EOF_ >> "${S}"/config.toml
+					llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+				_EOF_
+			fi
+
+		fi
+	done
+	if use wasm; then
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.wasm32-unknown-unknown]
+			linker = "$(usex system-llvm lld rust-lld)"
+			# wasm target does not have profiler_builtins https://bugs.gentoo.org/848483
+			profiler = false
+		_EOF_
+	fi
+
+	if [[ -n ${I_KNOW_WHAT_I_AM_DOING_CROSS} ]]; then # whitespace intentionally shifted below
+	# experimental cross support
+	# discussion: https://bugs.gentoo.org/679878
+	# TODO: c*flags, clang, system-llvm, cargo.eclass target support
+	# it would be much better if we could split out stdlib
+	# complilation to separate ebuild and abuse CATEGORY to
+	# just install to /usr/lib/rustlib/<target>
+
+	# extra targets defined as a bash array
+	# spec format:  <LLVM target>:<rust-target>:<CTARGET>
+	# best place would be /etc/portage/env/dev-lang/rust
+	# Example:
+	# RUST_CROSS_TARGETS=(
+	#	"AArch64:aarch64-unknown-linux-gnu:aarch64-unknown-linux-gnu"
+	# )
+	# no extra hand holding is done, no target transformations, all
+	# values are passed as-is with just basic checks, so it's up to user to supply correct values
+	# valid rust targets can be obtained with
+	# 	rustc --print target-list
+	# matching cross toolchain has to be installed
+	# matching LLVM_TARGET has to be enabled for both rust and llvm (if using system one)
+	# only gcc toolchains installed with crossdev are checked for now.
+
+	# BUG: we can't pass host flags to cross compiler, so just filter for now
+	# BUG: this should be more fine-grained.
+	filter-flags '-mcpu=*' '-march=*' '-mtune=*'
+
+	local cross_target_spec
+	for cross_target_spec in "${RUST_CROSS_TARGETS[@]}";do
+		# extracts first element form <LLVM target>:<rust-target>:<CTARGET>
+		local cross_llvm_target="${cross_target_spec%%:*}"
+		# extracts toolchain triples, <rust-target>:<CTARGET>
+		local cross_triples="${cross_target_spec#*:}"
+		# extracts first element after before : separator
+		local cross_rust_target="${cross_triples%%:*}"
+		# extracts last element after : separator
+		local cross_toolchain="${cross_triples##*:}"
+		use llvm_targets_${cross_llvm_target} || die "need llvm_targets_${cross_llvm_target} target enabled"
+		command -v ${cross_toolchain}-gcc > /dev/null 2>&1 || die "need ${cross_toolchain} cross toolchain"
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${cross_rust_target}]
+			ar = "${cross_toolchain}-ar"
+			cc = "${cross_toolchain}-gcc"
+			cxx = "${cross_toolchain}-g++"
+			linker = "${cross_toolchain}-gcc"
+			ranlib = "${cross_toolchain}-ranlib"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		if [[ "${cross_toolchain}" == *-musl* ]]; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				musl-root = "$(${cross_toolchain}-gcc -print-sysroot)/usr"
+			_EOF_
+		fi
+
+		# append cross target to "normal" target list
+		# example 'target = ["powerpc64le-unknown-linux-gnu"]'
+		# becomes 'target = ["powerpc64le-unknown-linux-gnu","aarch64-unknown-linux-gnu"]'
+
+		rust_targets="${rust_targets},\"${cross_rust_target}\""
+		sed -i "/^target = \[/ s#\[.*\]#\[${rust_targets}\]#" config.toml || die
+
+		ewarn
+		ewarn "Enabled ${cross_rust_target} rust target"
+		ewarn "Using ${cross_toolchain} cross toolchain"
+		ewarn
+		if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
+			ewarn "'sys-devel/binutils[multitarget]' is not installed"
+			ewarn "'strip' will be unable to strip cross libraries"
+			ewarn "cross targets will be installed with full debug information"
+			ewarn "enable 'multitarget' USE flag for binutils to be able to strip object files"
+			ewarn
+			ewarn "Alternatively llvm-strip can be used, it supports stripping any target"
+			ewarn "define STRIP=\"llvm-strip\" to use it (experimental)"
+			ewarn
+		fi
+	done
+	fi # I_KNOW_WHAT_I_AM_DOING_CROSS
+
+	einfo "Rust configured with the following flags:"
+	echo
+	echo RUSTFLAGS="\"${RUSTFLAGS}\""
+	echo RUSTFLAGS_BOOTSTRAP="\"${RUSTFLAGS_BOOTSTRAP}\""
+	echo RUSTFLAGS_NOT_BOOTSTRAP="\"${RUSTFLAGS_NOT_BOOTSTRAP}\""
+	echo MAGIC_EXTRA_RUSTFLAGS="\"${MAGIC_EXTRA_RUSTFLAGS}\""
+	env | grep "CARGO_TARGET_.*_RUSTFLAGS="
+	env | grep "CFLAGS_.*"
+	echo
+	einfo "config.toml contents:"
+	cat "${S}"/config.toml || die
+	echo
+}
+
+src_compile() {
+	RUST_BACKTRACE=1 "${EPYTHON}" ./x.py build -vv --config="${S}"/config.toml -j$(makeopts_jobs) || die
+}
+
+src_test() {
+	# https://rustc-dev-guide.rust-lang.org/tests/intro.html
+
+	# those are basic and codegen tests.
+	local tests=(
+		codegen
+		codegen-units
+		compile-fail
+		incremental
+		mir-opt
+		pretty
+		run-make
+	)
+
+	# fails if llvm is not built with ALL targets.
+	# and known to fail with system llvm sometimes.
+	use system-llvm || tests+=( assembly )
+
+	# fragile/expensive/less important tests
+	# or tests that require extra builds
+	# TODO: instead of skipping, just make some nonfatal.
+	if [[ ${ERUST_RUN_EXTRA_TESTS:-no} != no ]]; then
+		tests+=(
+			rustdoc
+			rustdoc-js
+			rustdoc-js-std
+			rustdoc-ui
+			run-make-fulldeps
+			ui
+			ui-fulldeps
+		)
+	fi
+
+	local i failed=()
+	einfo "rust_src_test: enabled tests ${tests[@]/#/src/test/}"
+	for i in "${tests[@]}"; do
+		local t="src/test/${i}"
+		einfo "rust_src_test: running ${t}"
+		if ! (
+				IFS=$'\n'
+				env $(cat "${S}"/config.env) RUST_BACKTRACE=1 \
+				"${EPYTHON}" ./x.py test -vv --config="${S}"/config.toml \
+				-j$(makeopts_jobs) --no-doc --no-fail-fast "${t}"
+			)
+		then
+				failed+=( "${t}" )
+				eerror "rust_src_test: ${t} failed"
+		fi
+	done
+
+	if [[ ${#failed[@]} -ne 0 ]]; then
+		eerror "rust_src_test: failure summary: ${failed[@]}"
+		die "aborting due to test failures"
+	fi
+}
+
+src_install() {
+	(
+	IFS=$'\n'
+	env $(cat "${S}"/config.env) DESTDIR="${D}" \
+		"${EPYTHON}" ./x.py install	-vv --config="${S}"/config.toml -j$(makeopts_jobs) || die
+	)
+
+	# bug #689562, #689160
+	rm -v "${ED}/usr/lib/${PN}/${PV}/etc/bash_completion.d/cargo" || die
+	rmdir -v "${ED}/usr/lib/${PN}/${PV}"/etc{/bash_completion.d,} || die
+	newbashcomp src/tools/cargo/src/etc/cargo.bashcomp.sh cargo
+
+	local symlinks=(
+		cargo
+		rustc
+		rustdoc
+		rust-gdb
+		rust-gdbgui
+		rust-lldb
+	)
+
+	use clippy && symlinks+=( clippy-driver cargo-clippy )
+	use miri && symlinks+=( miri cargo-miri )
+	use profiler && symlinks+=( rust-demangler )
+	use rls && symlinks+=( rls )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+	use rust-analyzer && symlinks+=( rust-analyzer )
+
+	einfo "installing eselect-rust symlinks and paths: ${symlinks[@]}"
+	local i
+	for i in "${symlinks[@]}"; do
+		# we need realpath on /usr/bin/* symlink return version-appended binary path.
+		# so /usr/bin/rustc should point to /usr/lib/rust/<ver>/bin/rustc-<ver>
+		# need to fix eselect-rust to remove this hack.
+		local ver_i="${i}-${PV}"
+		if [[ -f "${ED}/usr/lib/${PN}/${PV}/bin/${i}" ]]; then
+			einfo "Installing ${i} symlink"
+			ln -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}" "${ED}/usr/lib/${PN}/${PV}/bin/${ver_i}" || die
+		else
+			ewarn "${i} symlink requested, but source file not found"
+			ewarn "please report this"
+		fi
+		dosym "../lib/${PN}/${PV}/bin/${ver_i}" "/usr/bin/${ver_i}"
+	done
+
+	# symlinks to switch components to active rust in eselect
+	dosym "${PV}/lib" "/usr/lib/${PN}/lib-${PV}"
+	dosym "${PV}/libexec" "/usr/lib/${PN}/libexec-${PV}"
+	dosym "${PV}/share/man" "/usr/lib/${PN}/man-${PV}"
+	dosym "rust/${PV}/lib/rustlib" "/usr/lib/rustlib-${PV}"
+	dosym "../../lib/${PN}/${PV}/share/doc/rust" "/usr/share/doc/${P}"
+
+	newenvd - "50${P}" <<-_EOF_
+		LDPATH="${EPREFIX}/usr/lib/rust/lib"
+		MANPATH="${EPREFIX}/usr/lib/rust/man"
+	_EOF_
+
+	rm -rf "${ED}/usr/lib/${PN}/${PV}"/*.old || die
+	rm -rf "${ED}/usr/lib/${PN}/${PV}/doc"/*.old || die
+
+	# note: eselect-rust adds EROOT to all paths below
+	cat <<-_EOF_ > "${T}/provider-${P}"
+		/usr/bin/cargo
+		/usr/bin/rustdoc
+		/usr/bin/rust-gdb
+		/usr/bin/rust-gdbgui
+		/usr/bin/rust-lldb
+		/usr/lib/rustlib
+		/usr/lib/rust/lib
+		/usr/lib/rust/libexec
+		/usr/lib/rust/man
+		/usr/share/doc/rust
+	_EOF_
+
+	if use clippy; then
+		echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
+	fi
+	if use miri; then
+		echo /usr/bin/miri >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-miri >> "${T}/provider-${P}"
+	fi
+	if use profiler; then
+		echo /usr/bin/rust-demangler >> "${T}/provider-${P}"
+	fi
+	if use rls; then
+		echo /usr/bin/rls >> "${T}/provider-${P}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+	fi
+	if use rust-analyzer; then
+		echo /usr/bin/rust-analyzer >> "${T}/provider-${P}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${P}"
+
+	if use dist; then
+		insinto "/usr/lib/${PN}/${PV}/dist"
+		doins -r "${S}/build/dist/."
+	fi
+}
+
+pkg_postinst() {
+	eselect rust update
+
+	if has_version sys-devel/gdb || has_version dev-util/lldb; then
+		elog "Rust installs a helper script for calling GDB and LLDB,"
+		elog "for your convenience it is installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+	fi
+
+	if has_version app-editors/emacs; then
+		elog "install app-emacs/rust-mode to get emacs support for rust."
+	fi
+
+	if has_version app-editors/gvim || has_version app-editors/vim; then
+		elog "install app-vim/rust-vim to get vim support for rust."
+	fi
+}
+
+pkg_postrm() {
+	eselect rust cleanup
+}