dev-lang/rust: add 1.53.0

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

2 files changed, 707 insertions, 0 deletions

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index 21031f3704f3..44d8e23c4321 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -62,7 +62,41 @@ DIST rust-1.51.0-x86_64-unknown-linux-gnu.tar.xz 147543532 BLAKE2B 44ac97f6b650e
 DIST rust-1.51.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 033c41c165cf50a63479d1352a33abe94a63d9730f02016d09bf2e8a8804587d4fc802c047e7417e0befca2d5df5ca8c79a714ec1c1fb389240b6e8931fb9e9b SHA512 e314a7db9aaff445b67f828bf9a98705032071928e2102524c0c720a3b8feb292b8c6766838b92da2d213e93bf53fb780fc856b0370238fbb7e20431d2de6d5c
 DIST rust-1.51.0-x86_64-unknown-linux-musl.tar.xz 233773068 BLAKE2B cc9de90b967cc81005ce5c897d3fd6dc4e3880be96ac82c41382d19a8aca0244845830db7a33eaef85b6bdef0c00ae02c0390db932fa49f76e362af2c68edb56 SHA512 d8df3c4c3de435629986e21bc6b31edfb73cba394e76cf87ee98d2936f73aef60c988d020da7ec1188f6448eacad9d5aefed073f4f88ffa2eaac54ac7e3cb3f7
 DIST rust-1.51.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 2e2c20fe99b33e5361b1945f54b77d5e8acad34d1be9cadfd1971b2882e38bc4403a5a67769a74fdd7ab21434784f03084780ef827e26318168bf5d531f9e9bd SHA512 42392e8283a28d58d4874dbf97caa0377f27c6599c272c715fcdefee48551004d491f0509f2894f5696a2820f11dbb333e3bf878cbdf24b0c58add4a493acecc
+DIST rust-1.52.0-aarch64-unknown-linux-gnu.tar.xz 215549836 BLAKE2B d4179cc67772cd6b92085d68f4bb9de006fca7d8470a56766ac5d94a0379ae675d18c5275ec2ed1eab71274ce4f416a77f3ce74d849a1d4118b5a7ddec205a3c SHA512 7a26e14be6b27c7084c7c85b312341ab991c2df91ea53128f14707a4c725dd03ba7df30b9e9fcef39a509ab4f5d5feb028b99d6d9ffcc059996ed29b83eb90b9
+DIST rust-1.52.0-aarch64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B e66afc44186f48548dffcd7c6d7d92b4fbecea48bf3f7970d211844b5401a2556a138993517d049265109146a48856c7106616100ed63a5fa3f263d7023af6b6 SHA512 75ff89cd071641b01f4d483aca5997f6b3857d477b6fb40e6fdf11ff2ecdca74618cc59a9f0d1d2f942bde2d9a8738ac6f821d21d79f3ed85830ef530636a607
+DIST rust-1.52.0-aarch64-unknown-linux-musl.tar.xz 214159336 BLAKE2B 1b2afb80df6bf75d516127f07d57d12d876f12879c1d87059ab1c40ee1325ddb4e0c22f2fa185dab72f7633bce7d2ff5ed92ce4e88d4e118ac80630a061ec0c4 SHA512 9461c7272ac3e2c854e8e5f24cd57e5d648a3f923a9413eebd9f45a143d27378bc09c4d30ee7a1773a56baa31066dcc9f955b0805ce9f47d81b52e47a3a3e369
+DIST rust-1.52.0-aarch64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 71e8d615e921a70341b543992eef062186f72169a9763562114af8afd8ab3469a104677fe103a04a03881ec308b25fff412ba4eaac6e4ff02f29527ddefce8b8 SHA512 1033d23a2c05ec207c7fe032f5d9986d5a1d839ca54b0ea57a7a35c8c37512e9732835f2f280f436af326e948da913492f84cd6d0dfb9c397a095167f31e4c04
+DIST rust-1.52.0-arm-unknown-linux-gnueabi.tar.xz 195145936 BLAKE2B 3c2e1f947164a18b0a0e642775560c23407eb9f79ce426b6f191eab3204b78288aa404c9f5d388a0831ff124a92c4bad6927edc252ec82f0fed194b361c75256 SHA512 20fd1d03f3c9a935d0fd282fc7ea5808165b45865044ba8a8b09ee07d1410ad80401f800d1c70dab9e42b496deb58def88d8dd10de551e2a086e9cdede06385a
+DIST rust-1.52.0-arm-unknown-linux-gnueabi.tar.xz.asc 801 BLAKE2B d73e4062015a30339dc0210afaa6779912051968b174a21f09e518ecc74a763d01fee8a813e08dbd7103583d7496b76248755e2c382e8e645c0524982a7bc0bb SHA512 e707a9a1960db80602d6b5d827e81fd828cca30807bdf78e7adf9378526450c5ec87d4068b3c395142fc532cf7dee7782a5f077d8ef5051c79f2b86f8631c21b
+DIST rust-1.52.0-arm-unknown-linux-gnueabihf.tar.xz 195367332 BLAKE2B 72bfb4303f3e3077958cea7050dd4100619eb14fb164d33c6ce696d3b6ddbb2099cc2850dd17b961dfb40cb1b5b20ee8158f87e0fe76426e728b2dd7752870bc SHA512 6b2f4d907ebc53983cadce97a10036a6f7e333aea1e301067fccbc38dfcc6a49ad5770cb366bc2df82aee148d88edc122930355409f0926273f85b72bf4b261f
+DIST rust-1.52.0-arm-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B 21a835f06fb41677db5cf1a06244b2ea3caa8462330c2599e6a77d4c82054f8bd717ba790cdf06f280f62adaeb839cb1ff7cc6dbce76fac75ca4791f1d72644d SHA512 ff46a6b6b086bc785faeeaa5db2de0c79d1898651f2113a726a08d81136b687e13eb03bb635c6c43cbeae2ec897999d2867a9c925436131871a61d7f93a5bad2
+DIST rust-1.52.0-armv7-unknown-linux-gnueabihf.tar.xz 201614124 BLAKE2B 780358a279a80aac343ed737068faea9ddc9ace4a52694a32a0df504e6864fb2da30474ead9e3419370a7c7d6465ffd957fae475d852e504390222a939294270 SHA512 100b9abdc3dc7852f880eea205056a7a6b78af39fc3b7019ebcac712d5eee3c053f0508a6dc1f9da13074ca476e9fb33514bb83098d3b41964e878c0fc6498d4
+DIST rust-1.52.0-armv7-unknown-linux-gnueabihf.tar.xz.asc 801 BLAKE2B e93e9ff5068ac52bb85c42c64b528f60fac755e022b9be7680e203ad3acdee44e8cdfa00f06f4096b17106d2fe3287061c66fd411e2e6449301b0c4befd81e98 SHA512 7c8e6cc76b4d22a4b7fdd88e73e5f99fec9bb9d9cd86293a4813d25a11739e4f104f3c8c5a1113240909757b893fd88ef34a6fc7139a6d37923d241ac60c01cf
+DIST rust-1.52.0-i686-unknown-linux-gnu.tar.xz 214798144 BLAKE2B dae7a81f1bce6f24d9766621d751b090c4a560af83686f19ae4d309da5fc8f59f1a46caea03bad593018a07ff44bd078ac5e775edf4b92ad178f641a5a3f7626 SHA512 10fcf9e891ae8bc6e83b5e71c83b34773c18b024c9e9b580cfae714b4e135d313ba5434fc28c2dffa3db2e50669b3acd07e6874de0cfab89b343db92bfbdff80
+DIST rust-1.52.0-i686-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 699ca61fbe0f9763b5e3040f0d2854e34d6650f55dae2e864b88aa1d0402551a372970a3b6f4758e03619dba1201fb288c49a255eb1e7ea7ea0cb7668dde9604 SHA512 fc38e23183f104ed092072666bce6e40ab44822568ea69f31d5131508c53532a5db0c7148434605df6ee216559eb5927fac1ac32c17b3a3ebc336953f98a3ae6
+DIST rust-1.52.0-mips-unknown-linux-gnu.tar.xz 155487344 BLAKE2B 8f4d1dd47830f9d691e564ccab1a265e4f2622edc93f942d7db222b06c5f855187c855823bf0f38d7c534158905ee9eab6e5455900832891fd34c2b5649f4dc3 SHA512 9395eba6b7c8ddb5a35ff6e7bcc43eddc7fd2c7604a508a30aa63c4648bc3c9fee228cfd54cef6a2604cc8b695178c9d04cd8d05664279ef0bbca886e0d74a6b
+DIST rust-1.52.0-mips-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 8d226ab1e1f85620463e4cb1eaf2d363906d3eb5d7bed82e24b4f84c8969c649fc899b0dc446f4160ebc273850f158322cae1553ad499dfeee4ff34eaf161e52 SHA512 ed26f86680332d82aeb3dc8592f634a56b2269f5c4fbc75223b05cbd3775d6d8b4421dbddce96cd1fbf1f84cdd585f2b779c6a3f11639c101245bfe76a0a0cfa
+DIST rust-1.52.0-mips64-unknown-linux-gnuabi64.tar.xz 165086396 BLAKE2B 1241fce74a0583719d5e40cd48239de5fa7e121f87baf0f1e4f18106a69a3e6c6991754cf7c62492f850919ed02fd371c9e7360972d6ab4b556c243c72bcda89 SHA512 6ebda7432d5fd0d5a99c684e2dab2db0446d5d4ba1000696c14c26f5288c763dc0743af197c6fe809e2e6f90d90b12d84714ff64f195ca415760d9110c6f8b0a
+DIST rust-1.52.0-mips64-unknown-linux-gnuabi64.tar.xz.asc 801 BLAKE2B 58ebdce3798c0a95a08394bd8398dce5e145848fc2a97233c69befd9b541af526324d777dec4909b7586709bdf6af8ec69cae980032dc86c650047dff057e823 SHA512 34a16221fa0e09acf88e67f7425ed6154caa8b9a1dd2eafe4cc8167204bb57cfc96824047e4e070b5e91109c45376a8873d873b329ed74df43b279f29768fa8a
+DIST rust-1.52.0-mipsel-unknown-linux-gnu.tar.xz 158692144 BLAKE2B 331afebbbc7d5c0fa5eaf182e8642f7b38c583418469a7e2b282378556db3813445b552ea89a596df56030a119e1deda1e1bbdc1983f5dacd3115e9de7c860c5 SHA512 0149304d963eeffbbb929eb6f1f24a3f1e5d43c627252bcca8df86fe894858d5d399eb5f8ddabbaf8c2768f93ee05fbaa82b1552c76dbb319614f0e93b21558e
+DIST rust-1.52.0-mipsel-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B a4b835e14bcd9f1c24cb66dd1daf4777d25681ab175b377dba37ca4bc51e0bf360df4fb6feb3e85e0c05f79be31e51d180ffea30bc0cd96f69ca455cc4b2238d SHA512 c9b33e4ca113343b08e16410b509aca98c08338e131581d223435f8d1eb1248e2abc6a0ef10cf612fd4a305d88d4fb605785d4c067520dff5b699ce00e2799bf
+DIST rust-1.52.0-powerpc-unknown-linux-gnu.tar.xz 170724484 BLAKE2B 1e58e0a338498061c0e46e65660fcf01bd8461b3fcded864ba63196d4fc29e0b56e026e4d80b7535b63bb5bc204c748165498e7cfcda3713a97aa17bd8ac65b1 SHA512 44af21d9cf5d5d654f1f9437aefb61ba5bd3f3bdc67c657fba8ab03494a7ead53b6f5be17153f1f20acf099cd90760de29008c76fd766d6facbab32bf7921523
+DIST rust-1.52.0-powerpc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 6e42783107d1aae59f771284f15e1304595da710700a7664cc199fe7544dfb9cdfcb8c5f67e3c520a68ffb7fd7202de2f071cf92ce95b858f38e4ceb72649c4c SHA512 a68c780526a0dc3ba6c9e74258b124f4e64f52dab1dc0d1bcac5cbed752a9884caf858be2a1b9eb987b400a26b824e556bbf5280f64a4f51df0aae8c3073b9aa
+DIST rust-1.52.0-powerpc64-unknown-linux-gnu.tar.xz 184549672 BLAKE2B 2121f8d22d9348a61ba9eecb40bb13afee199450c7bba2d1852169f3b61ec193ea6979483139875c29a0a767732f5ffe12f81528c713492e0173084691b4b7d2 SHA512 7c24c9193fc4fe2109e38f140a8c240e0535171460de9965291c08003abe7c1ea89796afa7dcb2018eece4d9eed48ebf9469d1a040f06ab4f6a12807c789f7d8
+DIST rust-1.52.0-powerpc64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 7f5d881c1e1618be807ed6f65551fbec9190345f30c24b3c99c69e19cf87cda39c0fa6d0667d6e10e27444a864f9d49638f79fb8ac2d57558d745c3496ed01c7 SHA512 1b73e49173325b3ec9fea1c346f702ae33235aacd0b821d5b9a90148a26046e45fb547223a0cef6fadf03b5124a824a9b83984f3b5841cd5d3b861aa3223aa88
+DIST rust-1.52.0-powerpc64le-unknown-linux-gnu.tar.xz 194640544 BLAKE2B aa5e59e6059bbba874c40f7570404fbcfa5108aceb04f53ae42fc8ea4e833917f3cf6e84a1dd69cc5bf9cec3bbf0b3063258ff57699d3d0769038b44f4ccdf33 SHA512 916a3338c850cf804535e25aebc0fdcf6cea8fe9e5df9fed11fbf03ae81fb8220321dc41edd7133f287dfee0dbf19730ff8b020f32322850329865db76bab95e
+DIST rust-1.52.0-powerpc64le-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B ee33eefaf5b2eb96ef8fc2746334489b798b95f6b10e64deeaad72c4c1b45c9e335e450d8f896eec50c1b912b8e063ecec246c1d35c97f471236a876af7d36b4 SHA512 a66796a7459316f593649ebb309394d67bcf5ac241fd488c8e480df1837818369f79a198d1e56eb0488ab50dbad8d4162392709a2115005694ca0dd16f7e42ed
+DIST rust-1.52.0-riscv64gc-unknown-linux-gnu.tar.xz 181497380 BLAKE2B 40f978a60d7eea43b6e5eaeaff85611bfe571b3908a43aba2405b86ffb07c20043509ecd7f78546b4c6d795dbf4d06217e95c0855039f2cf92c372e0b3f959c9 SHA512 f0486885b26848bb1b910dbd6dd898b208ea0fb2f89714f0a8d59db330471447f4f4aad05ca534bbcf267c95e8eaabcb34d6ba41b576a2a8c77d80431c4212d2
+DIST rust-1.52.0-riscv64gc-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B 775d1ab86cce821e0dbf95aee99265322cb210745430f48c93e4f51cdbe8cf373f622f7ced8df801aeb830e74b917177cda6839c4504c09f5761d598a145364f SHA512 668f52e962c9b7b0a9efb0f2e33474bdc6cede32c3e657b19a8b374b0d8fa6516d4de42295acd541f6c07683a17f5251ec3fa52be44d573de5cfbb83780f37fb
+DIST rust-1.52.0-s390x-unknown-linux-gnu.tar.xz 194810848 BLAKE2B 72d68066f492c2eb2ed7e9061b2a67a603aa6ef8738004a1d7ec21753c3bb1466c81fd7a18f674d156b8b4e3c755d641b0acccfa726ad04ac17be3199e941938 SHA512 6a91adf7c1947b63db0bf02b4aa4a36fbbfcc5b40d9c18175e4c5efe785b8a17ff21a887476cf76f7e3d3854f2cc362b5d2dc8243493291a4d19a705276e6355
+DIST rust-1.52.0-s390x-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B c9b51ff09e6de5d9d3cf93e0f21df52f1738aa6c1e7b93851512d9f464bec757477183c693a1740082a36564c10cd13569c129f026680506c1e1fae8192c835d SHA512 147498154e9ab97ec4e7c0037e6873f4eb5d23c53e2f53068e979815e7d4883c9a7a338048d21abf685f0fa348cc01e342f2d5a32856b11c52663910786750f3
+DIST rust-1.52.0-x86_64-unknown-linux-gnu.tar.xz 143053436 BLAKE2B cdbbd529c5d820318530e56347426bced5addd6f20886719abfbff6e174afadd94be36b1f3e6ba878b14198641b4a53c78f33e79bdc90025696a57659753bdac SHA512 27a8db421ae62af92e2c34dcc1fdd617bf7e8de2c68205773a3037be496ccbf21f5549dd18377a9730102e7915519824231218fef9a09abe9d116441d6ce28d2
+DIST rust-1.52.0-x86_64-unknown-linux-gnu.tar.xz.asc 801 BLAKE2B ec204ee0968d4114023f40dfdd8654451149b5433dbb4eec192cc68135f45ed28ae7b06eabdab417401529162c11939ee101f7eddce304111fe93e9806347902 SHA512 4ae425def112d8c38e91ded53fdd73a6c7d2043eda22ce955aaa7303ff2cd6e7e8d0cfaa0d596b29195ba449811653f91b9b65c8c96b3cc8136d060609594828
+DIST rust-1.52.0-x86_64-unknown-linux-musl.tar.xz 239422556 BLAKE2B 8bef78b335b384e6bf7a5dd4a47511aa69ce0de6f9d1ab78146cd55f37e01b358a0cb82b95dcd27d25d4a114b707155b923415f9a91e6a75ab83bca9f5f7e0e3 SHA512 30a9f45f591c3beb34deee23611b5afe0f90b7a2a1b7b813498547b3264ecb98ef1d6bdfb77468bd5364f2942d927418037eb4ffe413db520c701fdf79c89bf2
+DIST rust-1.52.0-x86_64-unknown-linux-musl.tar.xz.asc 801 BLAKE2B 2d69f81dd47ce7387311b576a7770f2b457beebba8cd1554e5eac501025b7b54e72078b69c7cf8a61bc295298d7f277f39a070ee8d83564942149a1b42089594 SHA512 688e3eaaf2a7e7995a9b36e6856b7922b4deada31fdab198df335b316672d20bc80e5e717cee4e2fc2f51ec8abaf97880dfa5424a7b122e46b02fb7f62836378
 DIST rustc-1.51.0-src.tar.xz 109596164 BLAKE2B c1ac89655adfe7db8005476d42c748cf1896f52888141229fd6dda43855dbb08c21c8e1f11398d2f1f9dd5f8d508d9158a3bda4f1b282d1b184ea4c701100837 SHA512 ded91468ddf3e6627f00e7ec3d44452aa24eb727a183c0de9d90264f593119a54300d56b09251a88260db480b48554181ae195c538996a32d68d48b6587ac0df
 DIST rustc-1.51.0-src.tar.xz.asc 801 BLAKE2B dc06d0bc40bcc5ec5ae247495b6975584a80a35480d36d45db4db57872432cc9c3d38238bf68a56386bffc6987f5c491cc75ef21cc7ba9260073c199d7e1791a SHA512 f00d69117e9f38a179219f976230582fc51b494a71519fd3c032a8abdf8d554d659122f671881783f2a49517b79cc4617986447d5972f7ff2467d56fce312c4c
 DIST rustc-1.52.1-src.tar.xz 115109508 BLAKE2B c5d73f5884037d287d88ba9fdaf63a36678b692e1b510920045797ab29f1660f05cda901e19411ff83ec3084c4130034c269976b1056220f3e629cff116d07f0 SHA512 55f5053ce40d4eba4663052817aef6a6275139ca229c89cd1ec44711458b412720203301d8c7975aac5720a91fcaf21847f8184f641cbb0004f722520283c73c
 DIST rustc-1.52.1-src.tar.xz.asc 801 BLAKE2B ea2f89289b4d9cf90a0d10148bf3494805c00e7822cc98addf0b602c35e4635bb1963d79168b395a5f7c7bd024070284fccd19757982daa0d554dcac166fd4d7 SHA512 0d692a085c017b03b8a135a28f7e6f1d7e05642d2e99f0f1fbc397e766bb8fed4b4c6b4c9157b79d9bb0c4229607dbc35711cd463c62a9966a4efb6f197de7d3
+DIST rustc-1.53.0-src.tar.xz 115686332 BLAKE2B fa068f89d42f927fdc79ee31aad1386eaf2aa596a060e059c5a1a73fe48c48d008fc952cd6c7912b743e41d77a94b205639eed0f728b2539b62f18a772cabfe3 SHA512 70485cf7a0f7fc36ee31644e546374079dc387a85b44e5e793707fd0a4d7ca05d311291e78b86db955485d8f21c47ff9e1908acc4da68ba04929287213a40c24
+DIST rustc-1.53.0-src.tar.xz.asc 801 BLAKE2B 75d3aa4122968f10a119f7a04df897f496588c7a1a2ddf1ea2222099c9efb0e320f5677a26c3271f86e7f500120664485f54c6025ae3c6df30d2b0fe758f5826 SHA512 e337579b9ab4febca4594c2c5d42c279b51cfc745c383be9a430204188311a25319c04c73fde34fdb2bb98a88bfd8daaddc67765834330e6c279a6e5a5648247
diff --git a/dev-lang/rust/rust-1.53.0.ebuild b/dev-lang/rust/rust-1.53.0.ebuild
new file mode 100644
index 000000000000..79a4b179f6bf
--- /dev/null
+++ b/dev-lang/rust/rust-1.53.0.ebuild
@@ -0,0 +1,673 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{7..9} )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing \
+	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 ~ppc64 ~riscv ~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 doc miri nightly parallel-compiler rls rustfmt system-bootstrap system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# List all the working slots in LLVM_VALID_SLOTS, newest first.
+LLVM_VALID_SLOTS=( 12 )
+LLVM_MAX_SLOT="${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? ( app-crypt/openpgp-keys-rust )
+"
+
+DEPEND="
+	>=app-arch/xz-utils-5.2
+	net-misc/curl:=[http2,ssl]
+	sys-libs/zlib:=
+	dev-libs/openssl:0=
+	elibc_musl? ( sys-libs/libunwind:= )
+	system-llvm? ( ${LLVM_DEPEND} )
+"
+
+# we need to block older versions due to layout changes.
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+	!<dev-lang/rust-1.47.0-r1
+	!<dev-lang/rust-bin-1.47.0-r1
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+	miri? ( nightly )
+	parallel-compiler? ( nightly )
+	test? ( ${ALL_LLVM_TARGETS[*]} )
+	wasm? ( llvm_targets_WebAssembly )
+	x86? ( cpu_flags_x86_sse2 )
+"
+
+# we don't use cmake.eclass, but can get a warnings
+CMAKE_WARN_UNUSED_CLI=no
+
+QA_FLAGS_IGNORED="
+	usr/lib/${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}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+# causes double bootstrap
+RESTRICT="test"
+
+VERIFY_SIG_OPENPGP_KEY_PATH="/usr/share/openpgp-keys/rust.asc"
+
+PATCHES=(
+	"${FILESDIR}"/1.47.0-ignore-broken-and-non-applicable-tests.patch
+	"${FILESDIR}"/1.49.0-gentoo-musl-target-specs.patch
+)
+
+S="${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 ${rustc_version} to build"
+	fi
+}
+
+pre_build_checks() {
+	local M=8192
+	# multiply requirements by 1.5 if we are doing x86-multilib
+	if use amd64; then
+		M=$(( $(usex abi_x86_32 15 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
+}
+
+src_prepare() {
+	if ! use system-bootstrap; then
+		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() {
+	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_targets},\"$(rust_abi $(get_abi_CHOST ${v##*.}))\""
+	done
+	if use wasm; then
+		rust_targets="${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/wasm32_base.rs || die
+		fi
+	fi
+	rust_targets="${rust_targets#,}"
+
+	local tools="\"cargo\","
+	if use clippy; then
+		tools="\"clippy\",$tools"
+	fi
+	if use miri; then
+		tools="\"miri\",$tools"
+	fi
+	if use rls; then
+		tools="\"rls\",\"analysis\",\"src\",$tools"
+	fi
+	if use rustfmt; then
+		tools="\"rustfmt\",$tools"
+	fi
+
+	local rust_stage0_root
+	if use system-bootstrap; then
+		local printsysroot
+		printsysroot="$(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="$(rust_abi)"
+
+	cat <<- _EOF_ > "${S}"/config.toml
+		[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 = $(toml_usex system-llvm)
+		[build]
+		build = "${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 = [${tools}]
+		verbose = 2
+		sanitizers = false
+		profiler = false
+		cargo-native-static = false
+		[install]
+		prefix = "${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 = ["gz"]
+	_EOF_
+
+	for v in $(multilib_get_enabled_abi_pairs); do
+		rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+		arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+		cat <<- _EOF_ >> "${S}"/config.env
+			CFLAGS_${rust_target}=${arch_cflags}
+		_EOF_
+
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.${rust_target}]
+			cc = "$(tc-getBUILD_CC)"
+			cxx = "$(tc-getBUILD_CXX)"
+			linker = "$(tc-getCC)"
+			ar = "$(tc-getAR)"
+		_EOF_
+		# librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
+		if use elibc_musl; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				crt-static = false
+			_EOF_
+		fi
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${S}"/config.toml
+				llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+			_EOF_
+		fi
+	done
+	if use wasm; then
+		cat <<- _EOF_ >> "${S}"/config.toml
+			[target.wasm32-unknown-unknown]
+			linker = "$(usex system-llvm lld rust-lld)"
+		_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.${cross_rust_target}]
+			cc = "${cross_toolchain}-gcc"
+			cxx = "${cross_toolchain}-g++"
+			linker = "${cross_toolchain}-gcc"
+			ar = "${cross_toolchain}-ar"
+		_EOF_
+		if use system-llvm; then
+			cat <<- _EOF_ >> "${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:-}"
+	env | grep "CARGO_TARGET_.*_RUSTFLAGS="
+	cat "${S}"/config.env || die
+	echo
+	einfo "config.toml contents:"
+	cat "${S}"/config.toml || die
+	echo
+}
+
+src_compile() {
+	# we need \n IFS to have config.env with spaces loaded properly. #734018
+	(
+	IFS=$'\n'
+	env $(cat "${S}"/config.env) RUST_BACKTRACE=1\
+		"${EPYTHON}" ./x.py dist -vv --config="${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 rls && symlinks+=( rls )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+
+	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"
+		$(use amd64 && usex elibc_musl 'CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-C target-feature=-crt-static"' '')
+		$(use arm64 && usex elibc_musl 'CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-C target-feature=-crt-static"' '')
+	_EOF_
+
+	rm -rf "${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-${P}"
+	fi
+	if use rls; then
+		echo /usr/bin/rls >> "${T}/provider-${P}"
+	fi
+	if use rustfmt; then
+		echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+		echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+	fi
+
+	insinto /etc/env.d/rust
+	doins "${T}/provider-${P}"
+}
+
+pkg_postinst() {
+	eselect rust update
+
+	if has_version sys-devel/gdb || has_version dev-util/lldb; then
+		elog "Rust installs a helper script for calling GDB and LLDB,"
+		elog "for your convenience it is installed under /usr/bin/rust-{gdb,lldb}-${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
+}