dev-lang/rust: add 1.74.0

Signed-off-by: WANG Xuerui <xen0n@gentoo.org>
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 790 insertions, 0 deletions

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index c8e38d51d7d6..603510ad8c4d 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -264,6 +264,34 @@ DIST rust-1.72.0-x86_64-unknown-linux-gnu.tar.xz 163402880 BLAKE2B 0f498510f8bba
 DIST rust-1.72.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 51083330fef8b0e9f4fafe71e3a08891bec9be8e1c2e64ef37cba463e99c13f44639981c8aae6c86d50c6a23c4846a4f056535dbcbf39a2d9096615862feff87 SHA512 284b74f87e192451ba95cc423089d64334f43da8c221f45acb683a088e7dfd783c488c7ed3fe68619aff4c245271cdcf4b1b8c5f0bef1f8c3d3af0ca13d394c4
 DIST rust-1.72.0-x86_64-unknown-linux-musl.tar.xz 234831716 BLAKE2B 3ee1a5727ad120bcf173dcee3770e342f107777984b06782f5ae588a58e5da94ad4550b00c168ddbe84350605100558bc01e139763b5734cdea32545ee6ee41e SHA512 62d5967669164ce7e8b6815298d79380ca96cce5a6c8a67db84cd3d5fdb6825ba9d2a91d59c2185a93b1c26030ef017c63942dc7a363e742d0abf356bca6f1f5
 DIST rust-1.72.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B e04731dd5edfe93d17cb032d772917d49bd46f195738cefe2e685f42b9ba5148d120e8d71c627cae46a665235f14ac0b35aff58498ff92da7edfdc5d6e562773 SHA512 2ed245aa779c594f8d9cbcbf63e7c68165d600408a25288163ceebf78946210a36958a3df80c50b2006e11930e09ecec0eee233ff659a9d2ffc78c1b55d3b0fc
+DIST rust-1.73.0-aarch64-unknown-linux-gnu.tar.xz 216033148 BLAKE2B 78bac094c78d68102cd5ca6a7bc9ac8a51ecd3e14cc5c66fefca0a0597b5ba439c22d69a323a6e7cafdfec60cadf0672c91ca5f85065ac8d7913c83437ec0256 SHA512 58198ebecaa4652e0477eed6ad2c29524e7a3e991ed437775281ce526c8485b2a1a49c75ac6fd5bdcc6cb997cee4d1b4d82fba49c03ad38bcafa764f5a9bdfb1
+DIST rust-1.73.0-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B d4b85efab3aef10fd6940630ed3cbf6cca12961228482ce42cdbd4c0c185c55b9ccecb1ca386e7a5c02fa33b77685dc8e2d619ecdec0cb5afc7a01402be5a22e SHA512 b7392e301c00e2ee1be692e6b5a44fdadc4b442979bf8f09fe71f80d82b6f395d0505621ba8eb54fe6145812f7f9c0d2b278e474d6edde51a2318cf27f5080bc
+DIST rust-1.73.0-aarch64-unknown-linux-musl.tar.xz 197525740 BLAKE2B ed84c438426bb0fc9a5a320731ae448f242b70a764d67e46e53a37f0e76262a183886e83fb27166e030740a27e6a79ef1c8f50bfc4a2c9c5d915ee5fa74a251f SHA512 b1a3007217dbb771e459b92a2ce0efca3babb34e9901cd44006d7c8ca92f48f67bdb877d3ec4710c58ad1645da4830a52cc2062b6b5a9827b8d57d508f4029a6
+DIST rust-1.73.0-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 2e2a965b37bdeec12fbe3f605c4bd10bb51adc7dd1c2e2d185b7306e8c75415d678b1bd83eb68e8a05099eb77958a928e867f87b0a4f05b5315b89869f120a64 SHA512 b65b08a68571cd0cf17f4469c1eb95868e00e6244e30ac0d3c30e0ad6abcaed143a7389002c0f90b2ddbd79b9c9c3856d66387f701a8d0eb9f1683ce456e4910
+DIST rust-1.73.0-arm-unknown-linux-gnueabi.tar.xz 180327600 BLAKE2B f28725f19259806f934298d2b6dde6bf59e5f8bc3ee0ad9b1cf0565a5383a31189170f26495b3103bbc9d86d2ac9b83147b3803508a53b96eebd214d2b0aff90 SHA512 27900c5faa9076db40cc85d973274a09ff44a76936312f905a3d9751d0b7480dc260ed3cec91a65bb78382c67208b28978e2079e28a47a25aa6279d09adcc045
+DIST rust-1.73.0-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B 03ad365e06dbaf30d4ca2d8d2d3066d4f956ba5426f2c5b601c3830d9b0741b3655d26eafb3853b41ab01dc377065ca330f9d6fcf89de066c50adb0c9c9fe3bd SHA512 ecef5fe8359d8dbf23337398c1cb90a269ae169a1cd08525361d6f39e0a24dd22c1819c7ee0fe3828431ad492af89d19bf8c3c7b111f7925831362e2050d1040
+DIST rust-1.73.0-arm-unknown-linux-gnueabihf.tar.xz 180870680 BLAKE2B fea49832d8eefa7545b76114874de3d653ed888f753b68cd7636b7a1462bb564e19bbe37a5f3b94cf9a06640bf81f6fcc97f224f0f3e1745eb19f99ae193d3af SHA512 3648672256182cf6c73e31a05af3084b996bf25e1ccad8b96d68501e57a4ae4cf57befdf84db27e3e1a9fa3af051117e94ffcefd14246794e7528020bc26f4d5
+DIST rust-1.73.0-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 7046fad305aabf192a1084328d739754bf76c27fd3f1efcc4be36047ef6c4bf899ef8ae7e3cb359e23578af4c9a25d4e1f453ed8695ba33c630d46351234de69 SHA512 7e046b79d4d0a1bee3c7c5f6b8e3020a342a39e9913a24ef672aa1d197e63905653acc24652b720a4b996029661503e2dfc3b678f297ce15c548281ed772ac23
+DIST rust-1.73.0-armv7-unknown-linux-gnueabihf.tar.xz 184898496 BLAKE2B d0b2ce03ce7ab5e2c843989958a00524fc59000f62dc07f9783f4b9f22c734b67b33e403e3300fe3350322e1ad2b59e64e41b339d5f5c258b29dcdd98dec9c61 SHA512 ca48bb9b683058321b0ae770faf2fd607e03ff5e9291626ccbeba707f5ef8c211c29b9ddf52dfa11958691a127f95dedb742010018bbd6be2fc1d7ddced44190
+DIST rust-1.73.0-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 12e19ff5f586a7f67bf7e4f6ee96d919293500bbfb3bec306b412a423a3dafe94fe63939f371a644e1d3a1575a6a21df78f11ee63a8dbae9af3a2ce6b03d5104 SHA512 9e1f316abb8f7861fe1188aba1880732b957514fe58de3f10e340c430c1ce64e9627feec1a655335d33605cc6f5ee32830159a8215c5a233f25ebff18e2c7bf7
+DIST rust-1.73.0-i686-unknown-linux-gnu.tar.xz 209918920 BLAKE2B 545c48dce0e275228e260669d0f5b93977a9c7a02237d4ae9d84ed69236f5e412c5980e2c5823478949214c2b775c89c836bbd43e25406c20fbdc52cee328240 SHA512 a80742d14acc1d018ac35b77abba4491b5eafe28bc3173527c865b0e930572f2a92d4fc459db51c34600f8288b20b5790346b5f8e6fbdfcb080f1f14f44a2db4
+DIST rust-1.73.0-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 9800a96cf8484b0370f343c2fdda0762bab534fa7551a7716e7665bc90b651207c471ef5e06b2d7acb766959155b5d593b375487b01cf65e980ebc721c3a4042 SHA512 dc0c25c270701ff6509bbff3fd173178ec8aa3e5cf606fe87b803e6f1279dde3571d22cf0c7f28bb0ba5410c08a491f9b9b937d0aa796c0ba30fe43f7e381c1e
+DIST rust-1.73.0-loongarch64-unknown-linux-gnu.tar.xz 161763960 BLAKE2B 1ae7019055a4fb457733826750d2c20708e7d8bfeb8532ac1af5027387bd1f992c2ab1fe08d088b07581b0a81d7ea7ac8e44ff077887297a4d4da2a633089de0 SHA512 9840e1454506e3f0880e8113040eecd1b363bb78371386aa069271e18e70600f81e19358539785a3bd1ada7244b4830362e6f0b466798cda7647ed795072342d
+DIST rust-1.73.0-loongarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B cacbbd7793d6f693cf2c1211529cb4a0c888f3ed4d8674f610e034a7216fcf7f4ecc85331aaeaa89ec02c1412a62fdbda29a3bca6faa64dee0f8d419d055b41d SHA512 64b8594f2f19151927f5b74584822a78b15da97fc8f5e4823dfc222056a203ed68ced70cca915e1694ea6b36fdef5697e5b56062cb761a0d9557e5c08ec8ea07
+DIST rust-1.73.0-powerpc-unknown-linux-gnu.tar.xz 176694620 BLAKE2B e8b43ea4b9ad78ece530985afdeb140e0e960213272857cedcfe4e9262c190c7d26ce77d46fd113d2742cb159442c256a081bb6cf23e6977fa5ca8c6cf21ec30 SHA512 03f889dad45d1bd9ee4af52209af3d763ad5362cf1a617c86b050e0d2fe00c39edc716fc32a83c6e45c118b97d828c32f682ffec5b32f215d6694509a885772f
+DIST rust-1.73.0-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B e63cf87a2fb0584f2fc5c01a98dbb12bd9a7f4aace54a08505a0b4f9e7141705409d8bff1cd3a2d7cf40504ea274f29e11624ba050d56e4ec2a4e794fdf188f1 SHA512 a86db43be2a2fd92638e6355ac4117e707073fbb98631a8b41064e5b01e12bc1d2c594547778d9c99ec3e24c5c4dce6603cbfcb3715b11aef9d2c2758ee8b7d6
+DIST rust-1.73.0-powerpc64-unknown-linux-gnu.tar.xz 176165132 BLAKE2B 3750ef413de00047fa957ecc6c832995e072b58b78f994bdd6b8291583acd0a4ab54634d4e4778456bce6420135c83e9961aef5e615fd62806531686e33a31d8 SHA512 9f1a669f7d532a831df76292916493e1bcd4a56d95d3819c477898eb0510bc8760d008fc1e7d383927f8afbeff826b0598f9bc4067f692f530856c8e444f44df
+DIST rust-1.73.0-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B a1c1db86107b48a554d815811b518f7b28abac90cd08920362643a538670e7859ce43d179de24551b5e4409e0a421029e66b8374b27ddd699ca68fe0f47b8904 SHA512 04604baa0f13693d4bc7a0729df7041a55c0cb9efa11ef511d29d2b5a50c3575867c1ecbb6a23a030dc014876bc9c02e370c8d0eb531249833fbb52dd964f2b4
+DIST rust-1.73.0-powerpc64le-unknown-linux-gnu.tar.xz 187628140 BLAKE2B 1ab716a7d2e536ca3447fc0aa2751d774259ea2e39ee3cc150bfe11967e57bd85b484cf050a39cba717a0552dabe6d1aa79ca7dc24abe4b43d4802fb9cc1bc85 SHA512 d6566978f47067b84715ef39756721ced5f5430d5c92f51b673db39d1e1666a8dd933e998d4fe3ccbc36ec47c62b4fe7e335c4e3b830d27571dcf9e534446d0d
+DIST rust-1.73.0-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 6b3a29cf580d750a17436036d6bdb2457cafde123c289205aa239457afa4de10b4b97c9f3ccc23cd296a1a388802ac4f696c71e45a2ff7c97d15d63f2a04cba3 SHA512 5840b7986e9472a4907ae01eee0c4a40664ce1a29ff159557766bcf50da773d246a74ffed2bc5bc735d255514e0daba55d10bdbf7d8d2c3a6aeebd704f3009b3
+DIST rust-1.73.0-riscv64gc-unknown-linux-gnu.tar.xz 182202208 BLAKE2B 836d89e6ce276d100edce8016f5a466b99e8aff2646be7e58dea2f38678e4fdb9b93fff1126573a112e19cdb32ee5290fa58df0e5cbb1c309e65927ae1439b52 SHA512 c49031996ecde5dfda4b8bf3869b37ecb51c89e3fb8f69d3d43d865bf2ed6dfa928f0239460f0f3c7b7168eedee9b5a957d956f39ad42fc7276fe64a649ee501
+DIST rust-1.73.0-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 119d6cf2b0b4f8950d51aac6eb865619412e513c6c87f31702572cb2120a20cb23133a763036cbac0a9977a20dccfb58a8b034d19d13892ffbde05c01970ec92 SHA512 578c2576f66d0ad344549a94cf83f80551dbec7ecf2ff8616d81cd1eb3a7154b89701a05caf6a21649361ccdd1abfd37b33de935e91dba02dd914945de3930b5
+DIST rust-1.73.0-s390x-unknown-linux-gnu.tar.xz 201224624 BLAKE2B 5f9f28c5f511a3bd119233e4a2b882119b18a42a8c235bafc57f35e365496fe9d6d88c6278e014345f76a98a235ecec31335178a6b047e5b2188d391ba465e70 SHA512 e946192961623be1e3ab4b3e2c86f16f9fd716ee3ccf88137e6ed7ca92b9e8376552a9b46b48c127f6be76a1fc7b240d9b8db568390fd7d81605634ebb431ea4
+DIST rust-1.73.0-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B d05fc43c55e47b3a32e8be8f97b072961e920ed09d368968d1121dfaa0dc36e11ca61a0b03df2f708d0eff31a80367b5d465434b851da4c8ff00ce9ecd577bce SHA512 5950cfd08f49bfd0f1277e2f07e333e7188d65d6a61d738dbe586bde8f3647862ef6d6ca5f52d74f357ae3997f1554a2c7cd0399392cde7ec32b1f2aaf8a4c6b
+DIST rust-1.73.0-x86_64-unknown-linux-gnu.tar.xz 161588916 BLAKE2B 10c1c57641e2ae076c55826985d8ef43034a3e4b6fd15d109f949e8bc655dfb16d45ce86482992cc2aa3f4000f3432b8be17019f9f5d29a92fb42c37cd7df72e SHA512 b70886b5ecac41a7e6ea85d1b2d1aa557a0395d3f8abe4b8d1ad91f3b32ac9ae73bebfd7a9c48ebef4141be041cf5bdfab8bdb78e1b4969afb439daca203d5a3
+DIST rust-1.73.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 22e68ec4e6bfa49c15344675abd20ef9449d928943dafc64bfa1cf78dd36ccbce4802af8d4adb84762194dabc512efa74655a93785c127e6942ebeca8f6e3303 SHA512 56e53a1047a23a7f37250a785de2422ee2a3a72fdedb9a02530b3cc1cd978370cbbfc0e67d75f3d537f48c6c78f91d3de949ac2c9392a79404609b169cedaa40
+DIST rust-1.73.0-x86_64-unknown-linux-musl.tar.xz 236190528 BLAKE2B 062b54b31742bc846bdff63fb38be3a3a1f6d2f061da26cee6a0b089feee995fe3dbea536675495ed75d47d657c3d4bf04e36f6752f59f8308f7eb9a397d6e38 SHA512 abd01e0c98a8aa447d01613e24302ca81a8cce7d41179ed60834a39ed1942de0459add3c498a63f94bb1ee8662a2750b375b49894e3108da45f47d3a643cfdba
+DIST rust-1.73.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 9822879d0f14eb5387a623d111ed7a3b1ff038522c071608bd254c4b3479da8a1e9ed78c69c267c1156c45a9cbb2f7db00d123b85f28021a743d392d1cb65c75 SHA512 ff65fd3ca47afeb10f7434d8d4f91b6649739167639c3eadf178aa1339553c5316bd0bb393cd53fcce17c126dcf8db1f1dca6e87044b14762bb20ed8f5a500b7
 DIST rustc-1.65.0-src.tar.xz 139674928 BLAKE2B a218263fb67e306b153f5a6dae95b5ec653acaa5eb4b833862d6f0fd4685a8cec097dadc1b8a934e1bf6055672c7a617f9a0ad4a7dbf2e78084297f10b7ada04 SHA512 3d0369ed3028209c4ecb9b9e7b5f5e3a20be8cc05199675df4f091d62a96c0734bc1dbd7630928fe162792392ec6d0daf9ceed10771531ce022200c7b631e3be
 DIST rustc-1.65.0-src.tar.xz.asc 801 BLAKE2B 43ff92011cd6f7f34ce0495fa341379e5907d032ea90f91e533e5edaec6ad518aad50a9d8b2694074d6909ee96aa779403b16e95792e962e79c1b967542ae26f SHA512 75b9be53363022c81333117876cbcc573bbd4733edf767cbb164218644efb1a9c4bfc2aa73aaa1e39f248a84f1adacb1930a94a6e63f60093ff760fb9ae02efc
 DIST rustc-1.66.1-src.tar.xz 141692940 BLAKE2B 3fae45345998386fda1b11ec896fac4613b8e3f0092bc0df29c9685f4a4012c0bd1b600911c2d19bcfa8f5a84b8a3c39d4c9e062a62cd61925b59129e1cd72b9 SHA512 1944c024c603140d0a9236043a3bd1d0d211dd8d368d6d82a3a620f1ff43b29624755b0943f2b38b40a188c7eee77a840238ea757eaf435e2a3fa6a0e6b82832
@@ -284,3 +312,5 @@ DIST rustc-1.72.0-src.tar.xz 151630408 BLAKE2B 7b26e5a9335f9262567b2a6aaf3b8ad6d
 DIST rustc-1.72.0-src.tar.xz.asc 801 BLAKE2B 7f0c94f9961edd6ad48372ef768ac69e39b6b7ef0514dc099510d7b53b336d12ac20092e52fbff0c524a6dcfd8c9c69542ae081aaa16ffc3a7ac8fe2ae70e8f8 SHA512 6c8776ddb5050ce29538d9845156cdf370b99d09051fa8c42c68a4d71ff0a6163abc029ac1355af55f1b9b371549e98ebb7e76535d76b77be548fdf917ed6195
 DIST rustc-1.73.0-src.tar.xz 154319536 BLAKE2B 077bdedb36fdbc30db3c6331ac6014615eb79393ad42e38488d037ba38eaa6542467d39b2a14228d0bf6717110f915bf6fdcf0074c6293f413720cc748316eff SHA512 75c59680a82cb9d076b9434744a1c65908524ef769293952f5d9c5779d9a9c6fa4d9aa0c7e7d6b7566a21a50a27cd6ae452b5283a4d4606b2fa1acc24dfd8e0c
 DIST rustc-1.73.0-src.tar.xz.asc 801 BLAKE2B fac2f8652e9a103e8a678b30222e1a505671253827d1d092c4964230a535a85e21cedf00b70f108ac5cb2db961b50e482223e8eaa5b0d585777dd43d80c5931e SHA512 e80ef6280c50522a575f040610184fcf5f45444db2534c6a334e66a69f3338b43d8b34cf035685f28d0e8f006427bbe413611c49fe028c9f72810d74ccfab15e
+DIST rustc-1.74.0-src.tar.xz 155975536 BLAKE2B c5a8fdca7f2152033df6d2fa046d3fba98bbe988bd68da45132aa7248e6df18119ad7d07df08d0e6574a1b33a0cfc0105e60cc1aad3627e2984b7774c175137d SHA512 d949987fab5b7fa4d92910cd4384debd11e598fd2b31d003439dd479977f3389e399d9fd9b43b9a856c54e8777fd10339e169dbb9e87b1a8b07a7ff2ff280c34
+DIST rustc-1.74.0-src.tar.xz.asc 801 BLAKE2B 62c8d8ccc8a948e07e93ad2b549e9ede411ccd3c67d2159bc127dbbe88938e9335d9a72e35d18b4face8a78adc08eabf747bae3b0873b60b1bb508de7a6d6821 SHA512 0b088748d722a47bf8016f7d61d371c5d40ba9788debecf302e9aaea1b63682fe33b731cb463847e3aa0a7c37a47a80147e68cf653018545033dfda328975474
diff --git a/dev-lang/rust/rust-1.74.0.ebuild b/dev-lang/rust/rust-1.74.0.ebuild
new file mode 100644
index 000000000000..0851f219f122
--- /dev/null
+++ b/dev-lang/rust/rust-1.74.0.ebuild
@@ -0,0 +1,760 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{9..12} )
+
+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 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+RUST_STAGE0_VERSION="1.$(($(ver_cut 2) - 1)).0"
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+SRC_URI="
+	https://static.rust-lang.org/dist/${SRC}
+	verify-sig? ( https://static.rust-lang.org/dist/${SRC}.asc )
+	!system-bootstrap? ( $(rust_all_arch_uris rust-${RUST_STAGE0_VERSION}) )
+"
+
+# keep in sync with llvm ebuild of the same version as bundled one.
+ALL_LLVM_TARGETS=( AArch64 AMDGPU 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[@]/%/(-)?}
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
+
+IUSE="big-endian clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind +lto miri nightly parallel-compiler profiler rustfmt rust-analyzer rust-src system-bootstrap system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# List all the working slots in LLVM_VALID_SLOTS, newest first.
+LLVM_VALID_SLOTS=( 17 )
+LLVM_MAX_SLOT="${LLVM_VALID_SLOTS[0]}"
+
+# splitting usedeps needed to avoid CI/pkgcheck's UncheckableDep limitation
+# (-) usedep needed because we may build with older llvm without that target
+LLVM_DEPEND="|| ( "
+for _s in ${LLVM_VALID_SLOTS[@]}; do
+	LLVM_DEPEND+=" ( "
+	for _x in ${ALL_LLVM_TARGETS[@]}; do
+		LLVM_DEPEND+="
+			${_x}? ( sys-devel/llvm:${_s}[${_x}(-)] )
+			wasm? ( sys-devel/lld:${_s} )"
+	done
+	LLVM_DEPEND+=" )"
+done
+unset _s _x
+LLVM_DEPEND+=" )
+	<sys-devel/llvm-$(( LLVM_MAX_SLOT + 1 )):=
+"
+
+# to bootstrap we need at least exactly previous version, or same.
+# most of the time previous versions fail to bootstrap with newer
+# for example 1.47.x, requires at least 1.46.x, 1.47.x is ok,
+# but it fails to bootstrap with 1.48.x
+# https://github.com/rust-lang/rust/blob/${PV}/src/stage0.json
+RUST_DEP_PREV="$(ver_cut 1).$(($(ver_cut 2) - 1))*"
+RUST_DEP_CURR="$(ver_cut 1).$(ver_cut 2)*"
+BOOTSTRAP_DEPEND="||
+	(
+		=dev-lang/rust-"${RUST_DEP_PREV}"
+		=dev-lang/rust-bin-"${RUST_DEP_PREV}"
+		=dev-lang/rust-"${RUST_DEP_CURR}"
+		=dev-lang/rust-bin-"${RUST_DEP_CURR}"
+	)
+"
+
+BDEPEND="${PYTHON_DEPS}
+	app-eselect/eselect-rust
+	|| (
+		>=sys-devel/gcc-4.7
+		>=sys-devel/clang-3.5
+	)
+	system-bootstrap? ( ${BOOTSTRAP_DEPEND} )
+	!system-llvm? (
+		>=dev-util/cmake-3.13.4
+		dev-util/ninja
+	)
+	test? ( sys-devel/gdb )
+	verify-sig? ( sec-keys/openpgp-keys-rust )
+"
+
+DEPEND="
+	>=app-arch/xz-utils-5.2
+	net-misc/curl:=[http2,ssl]
+	sys-libs/zlib:=
+	dev-libs/openssl:0=
+	system-llvm? (
+		${LLVM_DEPEND}
+		llvm-libunwind? ( sys-libs/llvm-libunwind:= )
+	)
+	!system-llvm? (
+		!llvm-libunwind? (
+			elibc_musl? ( sys-libs/libunwind:= )
+		)
+	)
+"
+
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+	sys-apps/lsb-release
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+	miri? ( nightly )
+	parallel-compiler? ( nightly )
+	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}/${PV}/bin/.*
+	usr/lib/${PN}/${PV}/libexec/.*
+	usr/lib/${PN}/${PV}/lib/lib.*.so
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/.*
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_SONAME="
+	usr/lib/${PN}/${PV}/lib/lib.*.so.*
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+QA_PRESTRIPPED="
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/rust-llvm-dwp
+	usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/self-contained/crtn.o
+"
+
+# An rmeta file is custom binary format that contains the metadata for the crate.
+# rmeta files do not support linking, since they do not contain compiled object files.
+# so we can safely silence the warning for this QA check.
+QA_EXECSTACK="usr/lib/${PN}/${PV}/lib/rustlib/*/lib*.rlib:lib.rmeta"
+
+# causes double bootstrap
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
+
+PATCHES=(
+	#"${FILESDIR}"/1.72.0-bump-libc-deps-to-0.2.146.patch  # pending refresh
+	"${FILESDIR}"/1.70.0-ignore-broken-and-non-applicable-tests.patch
+	"${FILESDIR}"/1.62.1-musl-dynamic-linking.patch
+	"${FILESDIR}"/1.67.0-doc-wasm.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+clear_vendor_checksums() {
+	sed -i 's/\("files":{\)[^}]*/\1/' "vendor/${1}/.cargo-checksum.json" || die
+}
+
+toml_usex() {
+	usex "${1}" true false
+}
+
+bootstrap_rust_version_check() {
+	# never call from pkg_pretend. eselect-rust may be not installed yet.
+	[[ ${MERGE_TYPE} == binary ]] && return
+	local rustc_wanted="$(ver_cut 1).$(($(ver_cut 2) - 1))"
+	local rustc_toonew="$(ver_cut 1).$(($(ver_cut 2) + 1))"
+	local rustc_version=( $(eselect --brief rust show 2>/dev/null) )
+	rustc_version=${rustc_version[0]#rust-bin-}
+	rustc_version=${rustc_version#rust-}
+
+	[[ -z "${rustc_version}" ]] && die "Failed to determine rust version, check 'eselect rust' output"
+
+	if ver_test "${rustc_version}" -lt "${rustc_wanted}" ; then
+		eerror "Rust >=${rustc_wanted} is required"
+		eerror "please run 'eselect rust' and set correct rust version"
+		die "selected rust version is too old"
+	elif ver_test "${rustc_version}" -ge "${rustc_toonew}" ; then
+		eerror "Rust <${rustc_toonew} is required"
+		eerror "please run 'eselect rust' and set correct rust version"
+		die "selected rust version is too new"
+	else
+		einfo "Using rust ${rustc_version} to build"
+	fi
+}
+
+pre_build_checks() {
+	local M=8192
+	# multiply requirements by 1.3 if we are doing x86-multilib
+	if use amd64; then
+		M=$(( $(usex abi_x86_32 13 10) * ${M} / 10 ))
+	fi
+	M=$(( $(usex clippy 128 0) + ${M} ))
+	M=$(( $(usex miri 128 0) + ${M} ))
+	M=$(( $(usex rustfmt 256 0) + ${M} ))
+	# add 2G if we compile llvm and 256M per llvm_target
+	if ! use system-llvm; then
+		M=$(( 2048 + ${M} ))
+		local ltarget
+		for ltarget in ${ALL_LLVM_TARGETS[@]}; do
+			M=$(( $(usex ${ltarget} 256 0) + ${M} ))
+		done
+	fi
+	M=$(( $(usex wasm 256 0) + ${M} ))
+	M=$(( $(usex debug 2 1) * ${M} ))
+	eshopts_push -s extglob
+	if is-flagq '-g?(gdb)?([1-9])'; then
+		M=$(( 15 * ${M} / 10 ))
+	fi
+	eshopts_pop
+	M=$(( $(usex system-bootstrap 0 1024) + ${M} ))
+	M=$(( $(usex doc 256 0) + ${M} ))
+	CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
+}
+
+llvm_check_deps() {
+	has_version -r "sys-devel/llvm:${LLVM_SLOT}[${LLVM_TARGET_USEDEPS// /,}]"
+}
+
+# Is LLVM being linked against libc++?
+is_libcxx_linked() {
+	local code='#include <ciso646>
+#if defined(_LIBCPP_VERSION)
+	HAVE_LIBCXX
+#endif
+'
+	local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - <<<"${code}") || return 1
+	[[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+pkg_pretend() {
+	pre_build_checks
+}
+
+pkg_setup() {
+	pre_build_checks
+	python-any-r1_pkg_setup
+
+	export LIBGIT2_NO_PKG_CONFIG=1 #749381
+
+	use system-bootstrap && bootstrap_rust_version_check
+
+	if use system-llvm; then
+		llvm_pkg_setup
+
+		local llvm_config="$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+		export LLVM_LINK_SHARED=1
+		export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" --libdir)"
+	fi
+}
+
+esetup_unwind_hack() {
+	# https://bugs.gentoo.org/870280
+	# this is a hack needed to bootstrap with libgcc_s linked tarball on llvm-libunwind system.
+	# it should trigger for internal bootstrap or system-bootstrap with rust-bin.
+	# the whole idea is for stage0 to bootstrap with fake libgcc_s.
+	# final stage will receive -L${T}/lib but not -lgcc_s args, producing clean compiler.
+	local fakelib="${T}/fakelib"
+	mkdir -p "${fakelib}" || die
+	# we need both symlinks, one for cargo runtime, other for linker.
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so.1" || die
+	ln -s "${ESYSROOT}/usr/lib/libunwind.so" "${fakelib}/libgcc_s.so" || die
+	export LD_LIBRARY_PATH="${fakelib}"
+	export RUSTFLAGS+=" -L${fakelib}"
+	# this is a literally magic variable that gets through cargo cache, without it some
+	# crates ignore RUSTFLAGS.
+	# this variable can not contain leading space.
+	export MAGIC_EXTRA_RUSTFLAGS+="${MAGIC_EXTRA_RUSTFLAGS:+ }-L${fakelib}"
+}
+
+src_prepare() {
+	# Clear vendor checksums for crates that we patched to bump libc.
+	# NOTE: refresh this on each bump.
+	#for i in addr2line-0.20.0 bstr cranelift-jit crossbeam-channel elasticlunr-rs handlebars icu_locid libffi \
+	#	terminal_size tracing-tree; do
+	#	clear_vendor_checksums "${i}"
+	#done
+
+	if ! use system-bootstrap; then
+		has_version sys-devel/gcc || esetup_unwind_hack
+		local rust_stage0_root="${WORKDIR}"/rust-stage0
+		local rust_stage0="rust-${RUST_STAGE0_VERSION}-$(rust_abi)"
+
+		"${WORKDIR}/${rust_stage0}"/install.sh --disable-ldconfig \
+			--without=rust-docs-json-preview,rust-docs --destdir="${rust_stage0_root}" --prefix=/ || die
+	fi
+
+	default
+}
+
+src_configure() {
+	filter-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 ${v##*.}))\""
+	done
+	if use wasm; then
+		rust_targets+=",\"wasm32-unknown-unknown\""
+		if use system-llvm; then
+			# un-hardcode rust-lld linker for this target
+			# https://bugs.gentoo.org/715348
+			sed -i '/linker:/ s/rust-lld/wasm-ld/' compiler/rustc_target/src/spec/wasm_base.rs || die
+		fi
+	fi
+	rust_targets="${rust_targets#,}"
+
+	# cargo and rustdoc are mandatory and should always be included
+	local tools='"cargo","rustdoc"'
+	use clippy && tools+=',"clippy"'
+	use miri && tools+=',"miri"'
+	use profiler && tools+=',"rust-demangler"'
+	use rustfmt && tools+=',"rustfmt"'
+	use rust-analyzer && tools+=',"rust-analyzer"'
+	use rust-src && tools+=',"src"'
+
+	local rust_stage0_root
+	if use system-bootstrap; then
+		local printsysroot
+		printsysroot="$(rustc --print sysroot || die "Can't determine rust's sysroot")"
+		rust_stage0_root="${printsysroot}"
+	else
+		rust_stage0_root="${WORKDIR}"/rust-stage0
+	fi
+	# in case of prefix it will be already prefixed, as --print sysroot returns full path
+	[[ -d ${rust_stage0_root} ]] || die "${rust_stage0_root} is not a directory"
+
+	rust_target="$(rust_abi)"
+
+	local cm_btype="$(usex debug DEBUG RELEASE)"
+	cat <<- _EOF_ > "${S}"/config.toml
+		changelog-seen = 2
+		[llvm]
+		download-ci-llvm = false
+		optimize = $(toml_usex !debug)
+		release-debuginfo = $(toml_usex debug)
+		assertions = $(toml_usex debug)
+		ninja = true
+		targets = "${LLVM_TARGETS// /;}"
+		experimental-targets = ""
+		link-shared = $(toml_usex system-llvm)
+		$(if is_libcxx_linked; then
+			# https://bugs.gentoo.org/732632
+			echo "use-libcxx = true"
+			echo "static-libstdcpp = false"
+		fi)
+		$(case "${rust_target}" in
+			i586-*-linux-*)
+				# https://github.com/rust-lang/rust/issues/93059
+				echo 'cflags = "-fcf-protection=none"'
+				echo 'cxxflags = "-fcf-protection=none"'
+				echo 'ldflags = "-fcf-protection=none"'
+				;;
+			*)
+				;;
+		esac)
+		enable-warnings = false
+		[llvm.build-config]
+		CMAKE_VERBOSE_MAKEFILE = "ON"
+		CMAKE_C_FLAGS_${cm_btype} = "${CFLAGS}"
+		CMAKE_CXX_FLAGS_${cm_btype} = "${CXXFLAGS}"
+		CMAKE_EXE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_MODULE_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_SHARED_LINKER_FLAGS_${cm_btype} = "${LDFLAGS}"
+		CMAKE_STATIC_LINKER_FLAGS_${cm_btype} = "${ARFLAGS}"
+		[build]
+		build-stage = 2
+		test-stage = 2
+		build = "${rust_target}"
+		host = ["${rust_target}"]
+		target = [${rust_targets}]
+		cargo = "${rust_stage0_root}/bin/cargo"
+		rustc = "${rust_stage0_root}/bin/rustc"
+		rustfmt = "${rust_stage0_root}/bin/rustfmt"
+		docs = $(toml_usex doc)
+		compiler-docs = false
+		submodules = false
+		python = "${EPYTHON}"
+		locked-deps = true
+		vendor = true
+		extended = true
+		tools = [${tools}]
+		verbose = 2
+		sanitizers = false
+		profiler = $(toml_usex profiler)
+		cargo-native-static = false
+		[install]
+		prefix = "${EPREFIX}/usr/lib/${PN}/${PV}"
+		sysconfdir = "etc"
+		docdir = "share/doc/rust"
+		bindir = "bin"
+		libdir = "lib"
+		mandir = "share/man"
+		[rust]
+		# https://github.com/rust-lang/rust/issues/54872
+		codegen-units-std = 1
+		optimize = true
+		debug = $(toml_usex debug)
+		debug-assertions = $(toml_usex debug)
+		debug-assertions-std = $(toml_usex debug)
+		debuginfo-level = $(usex debug 2 0)
+		debuginfo-level-rustc = $(usex debug 2 0)
+		debuginfo-level-std = $(usex debug 2 0)
+		debuginfo-level-tools = $(usex debug 2 0)
+		debuginfo-level-tests = 0
+		backtrace = true
+		incremental = false
+		default-linker = "$(tc-getCC)"
+		parallel-compiler = $(toml_usex parallel-compiler)
+		channel = "$(usex nightly nightly stable)"
+		description = "gentoo"
+		rpath = false
+		verbose-tests = true
+		optimize-tests = $(toml_usex !debug)
+		codegen-tests = true
+		dist-src = false
+		remap-debuginfo = true
+		lld = $(usex system-llvm false $(toml_usex wasm))
+		# only deny warnings if doc+wasm are NOT requested, documenting stage0 wasm std fails without it
+		# https://github.com/rust-lang/rust/issues/74976
+		# https://github.com/rust-lang/rust/issues/76526
+		deny-warnings = $(usex wasm $(usex doc false true) true)
+		backtrace-on-ice = true
+		jemalloc = false
+		lto = "$(usex lto fat off)"
+		[dist]
+		src-tarball = false
+		compression-formats = ["xz"]
+		compression-profile = "balanced"
+	_EOF_
+
+	for v in $(multilib_get_enabled_abi_pairs); do
+		rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+		arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+		export CFLAGS_${rust_target//-/_}="${arch_cflags}"
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${rust_target}]
+			ar = "$(tc-getAR)"
+			cc = "$(tc-getCC)"
+			cxx = "$(tc-getCXX)"
+			linker = "$(tc-getCC)"
+			ranlib = "$(tc-getRANLIB)"
+			llvm-libunwind = "$(usex llvm-libunwind $(usex system-llvm system in-tree) no)"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		# by default librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
+		# but we patch it and set to false here as well
+		if use elibc_musl; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				crt-static = false
+			_EOF_
+		fi
+	done
+	if use wasm; then
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.wasm32-unknown-unknown]
+			linker = "$(usex system-llvm lld rust-lld)"
+			# wasm target does not have profiler_builtins https://bugs.gentoo.org/848483
+			profiler = false
+		_EOF_
+	fi
+
+	if [[ -n ${I_KNOW_WHAT_I_AM_DOING_CROSS} ]]; then # whitespace intentionally shifted below
+	# experimental cross support
+	# discussion: https://bugs.gentoo.org/679878
+	# TODO: c*flags, clang, system-llvm, cargo.eclass target support
+	# it would be much better if we could split out stdlib
+	# complilation to separate ebuild and abuse CATEGORY to
+	# just install to /usr/lib/rustlib/<target>
+
+	# extra targets defined as a bash array
+	# spec format:  <LLVM target>:<rust-target>:<CTARGET>
+	# best place would be /etc/portage/env/dev-lang/rust
+	# Example:
+	# RUST_CROSS_TARGETS=(
+	#	"AArch64:aarch64-unknown-linux-gnu:aarch64-unknown-linux-gnu"
+	# )
+	# no extra hand holding is done, no target transformations, all
+	# values are passed as-is with just basic checks, so it's up to user to supply correct values
+	# valid rust targets can be obtained with
+	# 	rustc --print target-list
+	# matching cross toolchain has to be installed
+	# matching LLVM_TARGET has to be enabled for both rust and llvm (if using system one)
+	# only gcc toolchains installed with crossdev are checked for now.
+
+	# BUG: we can't pass host flags to cross compiler, so just filter for now
+	# BUG: this should be more fine-grained.
+	filter-flags '-mcpu=*' '-march=*' '-mtune=*'
+
+	local cross_target_spec
+	for cross_target_spec in "${RUST_CROSS_TARGETS[@]}";do
+		# extracts first element form <LLVM target>:<rust-target>:<CTARGET>
+		local cross_llvm_target="${cross_target_spec%%:*}"
+		# extracts toolchain triples, <rust-target>:<CTARGET>
+		local cross_triples="${cross_target_spec#*:}"
+		# extracts first element after before : separator
+		local cross_rust_target="${cross_triples%%:*}"
+		# extracts last element after : separator
+		local cross_toolchain="${cross_triples##*:}"
+		use llvm_targets_${cross_llvm_target} || die "need llvm_targets_${cross_llvm_target} target enabled"
+		command -v ${cross_toolchain}-gcc > /dev/null 2>&1 || die "need ${cross_toolchain} cross toolchain"
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${cross_rust_target}]
+			ar = "${cross_toolchain}-ar"
+			cc = "${cross_toolchain}-gcc"
+			cxx = "${cross_toolchain}-g++"
+			linker = "${cross_toolchain}-gcc"
+			ranlib = "${cross_toolchain}-ranlib"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+		if [[ "${cross_toolchain}" == *-musl* ]]; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				musl-root = "$(${cross_toolchain}-gcc -print-sysroot)/usr"
+			_EOF_
+		fi
+
+		# append cross target to "normal" target list
+		# example 'target = ["powerpc64le-unknown-linux-gnu"]'
+		# becomes 'target = ["powerpc64le-unknown-linux-gnu","aarch64-unknown-linux-gnu"]'
+
+		rust_targets="${rust_targets},\"${cross_rust_target}\""
+		sed -i "/^target = \[/ s#\[.*\]#\[${rust_targets}\]#" config.toml || die
+
+		ewarn
+		ewarn "Enabled ${cross_rust_target} rust target"
+		ewarn "Using ${cross_toolchain} cross toolchain"
+		ewarn
+		if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
+			ewarn "'sys-devel/binutils[multitarget]' is not installed"
+			ewarn "'strip' will be unable to strip cross libraries"
+			ewarn "cross targets will be installed with full debug information"
+			ewarn "enable 'multitarget' USE flag for binutils to be able to strip object files"
+			ewarn
+			ewarn "Alternatively llvm-strip can be used, it supports stripping any target"
+			ewarn "define STRIP=\"llvm-strip\" to use it (experimental)"
+			ewarn
+		fi
+	done
+	fi # I_KNOW_WHAT_I_AM_DOING_CROSS
+
+	einfo "Rust configured with the following flags:"
+	echo
+	echo RUSTFLAGS="\"${RUSTFLAGS}\""
+	echo RUSTFLAGS_BOOTSTRAP="\"${RUSTFLAGS_BOOTSTRAP}\""
+	echo RUSTFLAGS_NOT_BOOTSTRAP="\"${RUSTFLAGS_NOT_BOOTSTRAP}\""
+	echo MAGIC_EXTRA_RUSTFLAGS="\"${MAGIC_EXTRA_RUSTFLAGS}\""
+	env | grep "CARGO_TARGET_.*_RUSTFLAGS="
+	env | grep "CFLAGS_.*"
+	echo
+	einfo "config.toml contents:"
+	cat "${S}"/config.toml || die
+	echo
+}
+
+src_compile() {
+	RUST_BACKTRACE=1 "${EPYTHON}" ./x.py build -vvv --config="${S}"/config.toml -j$(makeopts_jobs) || die
+}
+
+src_test() {
+	# https://rustc-dev-guide.rust-lang.org/tests/intro.html
+
+	# those are basic and codegen tests.
+	local tests=(
+		codegen
+		codegen-units
+		compile-fail
+		incremental
+		mir-opt
+		pretty
+		run-make
+	)
+
+	# fails if llvm is not built with ALL targets.
+	# and known to fail with system llvm sometimes.
+	use system-llvm || tests+=( assembly )
+
+	# fragile/expensive/less important tests
+	# or tests that require extra builds
+	# TODO: instead of skipping, just make some nonfatal.
+	if [[ ${ERUST_RUN_EXTRA_TESTS:-no} != no ]]; then
+		tests+=(
+			rustdoc
+			rustdoc-js
+			rustdoc-js-std
+			rustdoc-ui
+			run-make-fulldeps
+			ui
+			ui-fulldeps
+		)
+	fi
+
+	local i failed=()
+	einfo "rust_src_test: enabled tests ${tests[@]/#/src/test/}"
+	for i in "${tests[@]}"; do
+		local t="src/test/${i}"
+		einfo "rust_src_test: running ${t}"
+		if ! RUST_BACKTRACE=1 "${EPYTHON}" ./x.py test -vv --config="${S}"/config.toml \
+				-j$(makeopts_jobs) --no-doc --no-fail-fast "${t}"
+		then
+				failed+=( "${t}" )
+				eerror "rust_src_test: ${t} failed"
+		fi
+	done
+
+	if [[ ${#failed[@]} -ne 0 ]]; then
+		eerror "rust_src_test: failure summary: ${failed[@]}"
+		die "aborting due to test failures"
+	fi
+}
+
+src_install() {
+	DESTDIR="${D}" "${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml -j$(makeopts_jobs) || die
+
+	# bug #689562, #689160
+	rm -v "${ED}/usr/lib/${PN}/${PV}/etc/bash_completion.d/cargo" || die
+	rmdir -v "${ED}/usr/lib/${PN}/${PV}"/etc{/bash_completion.d,} || die
+	newbashcomp src/tools/cargo/src/etc/cargo.bashcomp.sh cargo
+
+	local symlinks=(
+		cargo
+		rustc
+		rustdoc
+		rust-gdb
+		rust-gdbgui
+		rust-lldb
+	)
+
+	use clippy && symlinks+=( clippy-driver cargo-clippy )
+	use miri && symlinks+=( miri cargo-miri )
+	use profiler && symlinks+=( rust-demangler )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+	use rust-analyzer && symlinks+=( rust-analyzer )
+
+	einfo "installing eselect-rust symlinks and paths: ${symlinks[@]}"
+	local i
+	for i in "${symlinks[@]}"; do
+		# we need realpath on /usr/bin/* symlink return version-appended binary path.
+		# so /usr/bin/rustc should point to /usr/lib/rust/<ver>/bin/rustc-<ver>
+		# need to fix eselect-rust to remove this hack.
+		local ver_i="${i}-${PV}"
+		if [[ -f "${ED}/usr/lib/${PN}/${PV}/bin/${i}" ]]; then
+			einfo "Installing ${i} symlink"
+			ln -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}" "${ED}/usr/lib/${PN}/${PV}/bin/${ver_i}" || die
+		else
+			ewarn "${i} symlink requested, but source file not found"
+			ewarn "please report this"
+		fi
+		dosym "../lib/${PN}/${PV}/bin/${ver_i}" "/usr/bin/${ver_i}"
+	done
+
+	# symlinks to switch components to active rust in eselect
+	dosym "${PV}/lib" "/usr/lib/${PN}/lib-${PV}"
+	dosym "${PV}/libexec" "/usr/lib/${PN}/libexec-${PV}"
+	dosym "${PV}/share/man" "/usr/lib/${PN}/man-${PV}"
+	dosym "rust/${PV}/lib/rustlib" "/usr/lib/rustlib-${PV}"
+	dosym "../../lib/${PN}/${PV}/share/doc/rust" "/usr/share/doc/${P}"
+
+	newenvd - "50${P}" <<-_EOF_
+		LDPATH="${EPREFIX}/usr/lib/rust/lib"
+		MANPATH="${EPREFIX}/usr/lib/rust/man"
+	_EOF_
+
+	rm -rf "${ED}/usr/lib/${PN}/${PV}"/*.old || die
+	rm -rf "${ED}/usr/lib/${PN}/${PV}/bin"/*.old || die
+	rm -rf "${ED}/usr/lib/${PN}/${PV}/doc"/*.old || die
+
+	# note: eselect-rust adds EROOT to all paths below
+	cat <<-_EOF_ > "${T}/provider-${P}"
+		/usr/bin/cargo
+		/usr/bin/rustdoc
+		/usr/bin/rust-gdb
+		/usr/bin/rust-gdbgui
+		/usr/bin/rust-lldb
+		/usr/lib/rustlib
+		/usr/lib/rust/lib
+		/usr/lib/rust/libexec
+		/usr/lib/rust/man
+		/usr/share/doc/rust
+	_EOF_
+
+	if use clippy; then
+		echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
+	fi
+	if use miri; then
+		echo /usr/bin/miri >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-miri >> "${T}/provider-${P}"
+	fi
+	if use profiler; then
+		echo /usr/bin/rust-demangler >> "${T}/provider-${P}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+	fi
+	if use rust-analyzer; then
+		echo /usr/bin/rust-analyzer >> "${T}/provider-${P}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${P}"
+
+	if use dist; then
+		insinto "/usr/lib/${PN}/${PV}/dist"
+		doins -r "${S}/build/dist/."
+	fi
+}
+
+pkg_postinst() {
+	eselect rust update
+
+	if has_version sys-devel/gdb || has_version dev-util/lldb; then
+		elog "Rust installs a helper script for calling GDB and LLDB,"
+		elog "for your convenience it is installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+	fi
+
+	if has_version app-editors/emacs; then
+		elog "install app-emacs/rust-mode to get emacs support for rust."
+	fi
+
+	if has_version app-editors/gvim || has_version app-editors/vim; then
+		elog "install app-vim/rust-vim to get vim support for rust."
+	fi
+}
+
+pkg_postrm() {
+	eselect rust cleanup
+}