[gentoo-commits] repo/gentoo:master commit in: dev-lang/rust/, dev-lang/rust/files/

["Georgy Yakovlev" <gyakovlev@gentoo.org>]

commit:     51563211f1ddc9662e89cad5c1a2495fcdf9f117
Author:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
AuthorDate: Thu Oct  8 19:32:12 2020 +0000
Commit:     Georgy Yakovlev <gyakovlev <AT> gentoo <DOT> org>
CommitDate: Fri Oct  9 06:23:05 2020 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=51563211

dev-lang/rust: bump to 1.47.0

we now install to /usr/lib/rust/<ver>
this is more robust and mirrors how
rustup installs rust, also most slotted
toolchain projects already to it, so we follow

Bug: https://bugs.gentoo.org/734018
PR: https://github.com/gentoo/gentoo/pull/16846
Package-Manager: Portage-3.0.8, Repoman-3.0.1
Signed-off-by: Georgy Yakovlev <gyakovlev <AT> gentoo.org>

 dev-lang/rust/Manifest                             |  15 +
 ...46.0-don-t-create-prefix-at-time-of-check.patch |  31 ++
 ....0-ignore-broken-and-non-applicable-tests.patch |  75 +++
 dev-lang/rust/files/gentoo-musl-target-specs.patch | 168 ++++++
 dev-lang/rust/rust-1.47.0.ebuild                   | 582 +++++++++++++++++++++
 5 files changed, 871 insertions(+)

diff --git a/dev-lang/rust/Manifest b/dev-lang/rust/Manifest
index 9c9eea3dce4..9e09ade946e 100644
--- a/dev-lang/rust/Manifest
+++ b/dev-lang/rust/Manifest
@@ -40,6 +40,21 @@ DIST rust-1.45.1-powerpc64le-unknown-linux-gnu.tar.xz 119234164 BLAKE2B 4148957f
 DIST rust-1.45.1-s390x-unknown-linux-gnu.tar.xz 124758156 BLAKE2B ff62e14d5ae9f7213ebc24d694317ff292cb0d7d2a67f0ca284cddd2b9f594547b01a6c647780d47989d4405072f377d37fc03933431a3df804e37bc1248e803 SHA512 278411c6308eaa4d732ff4c0f448d808a5ee74dae5f3eaf04773ccf65c9bc5963153f62346d30de0f577dd6da89c55bed280c2fb0e50d2075e3c30a3649fc4e8
 DIST rust-1.45.1-x86_64-unknown-linux-gnu.tar.xz 117764080 BLAKE2B cafe6e4f7c28112879089d75703a1b1ce7c0cf9b5ab5beeb4ddf343f7bc93e8704bc105ba0bd95f1df6d62439f206d8f4ae9090330af857ec0a249540eb63122 SHA512 13ee5ff7cae29440e32fb140404ff01414d66f0ea8d79777fb1586541de1ee6ef8e12f9249c35374501460a2352f7d0f6035b5bdc2f0daa91d772a157657ec0b
 DIST rust-1.45.1-x86_64-unknown-linux-musl.tar.xz 123820216 BLAKE2B 1afe48589e5eec15d8fdb31d52b2ada49688e78a311298d421a8b2d4c0cc6a708223e5976518d66506584dc2adc63651b62b8c1fc3c3ccfaff80e2ef7ade5078 SHA512 39875878acfeb05d7b72bab2dea51063a523fa7ad136d582ba28603df7f8b1c3360e5838e5f9b08f396969e52bb1fc672fa4c08cf5f8ffc39128af129b6b17a6
+DIST rust-1.46.0-aarch64-unknown-linux-gnu.tar.xz 127384736 BLAKE2B a1efd25cf429a309a454ef5db38c68d642920e859ef6effbe88ace7f3c4050ae7e9cf10d2f5b70405475ffcbbbc80338e3a5e4b3cb632c555e31a0ebc1b76cd4 SHA512 53e5d8afadaa9505286dce4acbb911126d17bc7bf45ea4685070ff07be7f6c7860e543a7686eeac695e7e3e127ca38ba2f09b73467fbf5f92d0b2195467c51f2
+DIST rust-1.46.0-arm-unknown-linux-gnueabi.tar.xz 121741008 BLAKE2B d277cb19c9f9641f216eba9ddb8bdb0a1bf70b7376e82798dad3116ff6d976c6ec8f6442831ae6a3c64cfdb46c59cf47b482df5200af49ba5eeccb663538084b SHA512 74cc1c8f56c88bdb669d52edca69c8aed7500e51498e8bf4099b2edbf85a2beab1e6d447029eb24e12fdfcbf2272f5d8b741eb4aa48fe83dac44759478429284
+DIST rust-1.46.0-arm-unknown-linux-gnueabihf.tar.xz 120726564 BLAKE2B 5ef9c319d4744016e336a8d8bde99b2b9183dd13fc6873d4f0e239a52a86e054d42ee48ca1a84ac42d140b1bbe234f4eeaf90717f14959ad6966681429eef233 SHA512 89972cc03c05dd5bc003f6cf16e062b935b3fda288ae0c3d32a3d08ccdcbf7699c306aa3c017a13e76f13f8dca7a951ec98f23507de978ae87cffb6d6907af5c
+DIST rust-1.46.0-armv7-unknown-linux-gnueabihf.tar.xz 123912836 BLAKE2B 97cdb2e8d643826f7dd1554096e14c58c35b38cc2eebb49c478343bf8bc157995a9f1099c014800701d34edbf0f0798ac29babbd2a5bf261d1956bc731b0a99c SHA512 c7e320fd5169c99bf8a12fb5bf1c5fb19a05d14f75ce655e4b64cad3456594ef09be1da7ac34a09b5d84da0c857d1a6e5a0695b5ff04cda491ea92fea15d28dc
+DIST rust-1.46.0-i686-unknown-linux-gnu.tar.xz 141319800 BLAKE2B 712227e42b8597ee1c645cb344042e79ca40aef0e22d783c4a0c042bd07f686aafd9b80bebe0dfe69b4b012056509bfe510fffa8ba5357656d459fe5885fe0fe SHA512 b01e9b06c9de50e43bc6b5e1a5e6cc49dab1cf28b9cf0a8b974d2630c7ed4c6a5df6f321c872e11eb622c42f1d8cfaec77c1b67254a84365464fe3415acfa07f
+DIST rust-1.46.0-mips-unknown-linux-gnu.tar.xz 110175584 BLAKE2B 23e38e81d281d0df23795ff60e4a7503f63d443d966bc6d5068edc50fc0dd90e2fe45eb90b901a1fb3f8f813375533eaa142d625b661f5d76d2097b0cf572606 SHA512 0635060dd15f548834e5c946ec8deea10bf234f550f6a01d4d491f45e0d5f16e957f99caba14c91225d100e7c59e909869b816dfffe9f8681c09e9e5b6ca2bdd
+DIST rust-1.46.0-mips64-unknown-linux-gnuabi64.tar.xz 117357812 BLAKE2B c3118a0b710ceaffda8523840551306d4bbc7c78fc26016fc1ac0037c2a7cd68f56c11999f7e3bc435f93e0dbebf348fdc52255cc5978bdffb2d55dc9d56e23e SHA512 5dc6de40429e72ecad9546390f1f5e626d388938c7bc50a56fb258787b45e8d7363170d8d1a2bff56fbd8bef22060b6cb0c50fb016ccc7d4fb767ba6b7e80c2d
+DIST rust-1.46.0-mipsel-unknown-linux-gnu.tar.xz 111804692 BLAKE2B 4779d5602f2107321d5c6042dce1baaf6eec2f60cf2ba4330bf72fda0868d7e8294cf573b3ffab3654a0689d11599f2fc37430005686e91439abc7ae6fefb977 SHA512 3c9d17fa89636d37e125d7665883abc9912330d4a1f5291d44771fd1cbb17d604deccc07685cb567f1b141dde3668d5ef55f3661b04e4506d5337d69acc6738c
+DIST rust-1.46.0-powerpc-unknown-linux-gnu.tar.xz 111495200 BLAKE2B d618c61a05507abe13d1294594187a4552896cb61396c2f8bd6e506a71ab4bb5cd26ae3b2b573d1d5a4ea79fb4dd2238a2ae34059357ef397264beb0b67cbc34 SHA512 38df2204bd4bfe7371365266651a84da218ba909c3ae107432f6fef892e71488d193b8f54fe6738edd91aa0ca029038d864806b25289254711bd10f736bcc2d7
+DIST rust-1.46.0-powerpc64-unknown-linux-gnu.tar.xz 124882812 BLAKE2B 2362e25d39cfd2039ce18db08f43bceaaccd208ec113c16f6718803eadda964bb254a6afc606765a00026adc93cf366495d3546d6aac8a7444088f519d421c9b SHA512 40f9423d838cab74b9920372e728c4ca7057005d83af587387dd2b164a0bf93de65cebc035320bce25f80914c63ce65b84218b9a776b0b905428e4cba0821b8b
+DIST rust-1.46.0-powerpc64le-unknown-linux-gnu.tar.xz 130200900 BLAKE2B d38a7f131983aee27e6af59ab03999e7420745a0f9256b2623e71f36dd6f12605025dbdc510bd5ffb73e0d31a5c7e56a791bdf718b2eba629d08e2f75221b1c8 SHA512 986f0bf7995f35836b73fb7045cf43ae5efe0c2543c75c66cdcc0f8c1dd3513def3c291e021241e328142deaca690ce113526ffc870c4412a7841f244258a43e
+DIST rust-1.46.0-s390x-unknown-linux-gnu.tar.xz 134521076 BLAKE2B d3efd71dd7db812736680929185ad5f58a2dbf7d1b8a6f851834dd7b41713fc171dbcdf2472bedc13751bfeed58070d919d2a1138765ab75c0f4bdf817cb6418 SHA512 b6146695225ff6d0516e7bb6bc4620599356bb89b14f429a09d9d7f8715a94e8e218402346d5c9a10eeb54c0bdc40fb179289216b0cb4edd5bdf886f6b69aab4
+DIST rust-1.46.0-x86_64-unknown-linux-gnu.tar.xz 127200200 BLAKE2B 7d755e0622cda99d111490197b21ff4aaeb7b13292804566bc677b7b1d833eaa644b7a801863a1a01e3aa34be28a80344cae69edc57f8c8788884c78e037b750 SHA512 95f5adc2d2137010c7e5ac8a0fc70485250b4f9a909cb8b164b35fffff76ab88e9b09d305bfac37324ed080c5fc7643001d2abec5454ca911dc3513f1af52c88
+DIST rust-1.46.0-x86_64-unknown-linux-musl.tar.xz 142372372 BLAKE2B 7d3672234b61b772e2311127db569b37296bf3a9bf86841fb78c6d20da6a6abfc6c866ba4aa7cc44c12eebb0744fbeb401b491314db9eb481b926792cadcca22 SHA512 e2599c4c10fe9725e63524d89c0be869d43347620b0f6ff1a93cee5e7219f5560c6171d8eda99e5624eba60b9d488bfe0942c23eacdbac2ba42e4cd63f14b7c9
 DIST rustc-1.44.1-src.tar.xz 94756856 BLAKE2B 60f536c3ba0fa1fec4b6333ee57809ee5226090ad5041c14a136b4356ff3b898062e06c3fe54effe873e27931ac8fcb902cd48a38615a8de7eebc6ecb3bdc2bd SHA512 1c17002edae844a710db9b144c17171416330dc565343c65af8a6e112fb61555e2025bb4cf33cac1229d7df689e6ff8858b91ae00552400ccacafaf1de11849b
 DIST rustc-1.45.2-src.tar.xz 98683036 BLAKE2B a4102a5d4744b7ccc9b076aba00c39d69532f777e7d39e0e4ce2033b663b43e27b55034fdb3a1e13379fae9a16bff9e7748865a84507f7388ef0ebf9d421eac7 SHA512 cc6250c0bc844e77ca6dd7ae013e434ed3009b001914114866ed31f28edf3960221454d131e298b15050e3b8153fb8298d509559c2f7307c64611aa8e36b4d25
 DIST rustc-1.46.0-src.tar.xz 101868452 BLAKE2B da9798596b124a10d79c236a871228f05e5f571d22c2259328e7026c91e088c85f5de9c0536a16531e0cb10477bfcd16d3ac11467979f5561cb6199442b877ef SHA512 099857f1d295043587a4e2a65ef3e6a90e12c8b6958e98535a1656c113c553f9a9b621aba8a19cf21bd8d2c79d27cbfa4b8e6fabbcb3cbfee23b545be7b450b4
+DIST rustc-1.47.0-src.tar.xz 104143736 BLAKE2B 0454094dde35275488046826da87655e51bf0795481d6d08fd70d644bfc12481bca8641166106ef32f20494906025244715b16ff21a1c023f4bd2818aab42521 SHA512 6ba83c0158f8130ddeae7e070417a2121d8a548c8fe97e28bce116d84048636c75aaee78e0c92cd43a50f5679a1223fc226cc8c5ba9bbd1465e84c5c6034d5c9

diff --git a/dev-lang/rust/files/1.46.0-don-t-create-prefix-at-time-of-check.patch b/dev-lang/rust/files/1.46.0-don-t-create-prefix-at-time-of-check.patch
new file mode 100644
index 00000000000..9064a52ac2d
--- /dev/null
+++ b/dev-lang/rust/files/1.46.0-don-t-create-prefix-at-time-of-check.patch
@@ -0,0 +1,31 @@
+From 6b31232a9d32529e30765108f30365ac48587ce6 Mon Sep 17 00:00:00 2001
+From: Georgy Yakovlev <gyakovlev@gentoo.org>
+Date: Thu, 8 Oct 2020 15:48:33 -0700
+Subject: [PATCH] don't create prefix at time of check
+
+---
+ src/bootstrap/install.rs | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/src/bootstrap/install.rs b/src/bootstrap/install.rs
+index d9ee3bc..c5da9ce 100644
+--- a/src/bootstrap/install.rs
++++ b/src/bootstrap/install.rs
+@@ -73,12 +73,8 @@ fn install_sh(
+     let docdir_default = datadir_default.join("doc/rust");
+     let libdir_default = PathBuf::from("lib");
+     let mandir_default = datadir_default.join("man");
+-    let prefix = builder.config.prefix.as_ref().map_or(prefix_default, |p| {
+-        fs::create_dir_all(p)
+-            .unwrap_or_else(|err| panic!("could not create {}: {}", p.display(), err));
+-        fs::canonicalize(p)
+-            .unwrap_or_else(|err| panic!("could not canonicalize {}: {}", p.display(), err))
+-    });
++
++    let prefix = builder.config.prefix.as_ref().unwrap_or(&prefix_default);
+     let sysconfdir = builder.config.sysconfdir.as_ref().unwrap_or(&sysconfdir_default);
+     let datadir = builder.config.datadir.as_ref().unwrap_or(&datadir_default);
+     let docdir = builder.config.docdir.as_ref().unwrap_or(&docdir_default);
+-- 
+2.28.0
+

diff --git a/dev-lang/rust/files/1.47.0-ignore-broken-and-non-applicable-tests.patch b/dev-lang/rust/files/1.47.0-ignore-broken-and-non-applicable-tests.patch
new file mode 100644
index 00000000000..ff1707f4b8a
--- /dev/null
+++ b/dev-lang/rust/files/1.47.0-ignore-broken-and-non-applicable-tests.patch
@@ -0,0 +1,75 @@
+From 1879d1d1a284bf51c752e47db284ce22701ed5d0 Mon Sep 17 00:00:00 2001
+From: Samuel Holland <samuel@sholland.org>
+Date: Sun, 16 Sep 2018 16:38:48 +0000
+Subject: [PATCH 12/15] Ignore broken and non-applicable tests
+
+c-link-to-rust-va-list-fn: unstable feature, broken on aarch64, #56475
+env-funky-keys: can't handle LD_PRELOAD (e.g. sandbox)
+long-linker-command-lines: takes >10 minutes to run (but still passes)
+simd-intrinsic-generic-bitmask.rs: broken on BE, #59356
+sparc-struct-abi: no sparc target
+sysroot-crates-are-unstable: can't run rustc without RPATH
+---
+ src/test/codegen/sparc-struct-abi.rs                            | 1 +
+ src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile   | 2 ++
+ src/test/run-make-fulldeps/long-linker-command-lines/Makefile   | 2 ++
+ src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile | 2 ++
+ src/test/ui/env-funky-keys.rs                                   | 1 +
+ 6 files changed, 10 insertions(+)
+
+diff --git a/src/test/codegen/sparc-struct-abi.rs b/src/test/codegen/sparc-struct-abi.rs
+index 78e5b14a212..6f93e93286b 100644
+--- a/src/test/codegen/sparc-struct-abi.rs
++++ b/src/test/codegen/sparc-struct-abi.rs
+@@ -4,6 +4,7 @@
+ 
+ // only-sparc64
+ // compile-flags: -O --target=sparc64-unknown-linux-gnu --crate-type=rlib
++// ignore-test
+ #![feature(no_core, lang_items)]
+ #![no_core]
+ 
+diff --git a/src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile b/src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile
+index f124ca2ab61..363b18f0985 100644
+--- a/src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile
++++ b/src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile
+@@ -1,3 +1,5 @@
++# ignore-aarch64
++
+ -include ../tools.mk
+ 
+ all:
+diff --git a/src/test/run-make-fulldeps/long-linker-command-lines/Makefile b/src/test/run-make-fulldeps/long-linker-command-lines/Makefile
+index 5876fbc94bc..5f167ece1a2 100644
+--- a/src/test/run-make-fulldeps/long-linker-command-lines/Makefile
++++ b/src/test/run-make-fulldeps/long-linker-command-lines/Makefile
+@@ -1,3 +1,5 @@
++# ignore-test
++
+ -include ../tools.mk
+ 
+ all:
+diff --git a/src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile b/src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile
+index 9e770706857..6d92ec5cec8 100644
+--- a/src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile
++++ b/src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile
+@@ -1,1 +1,3 @@
++# ignore-test
++
+ all:
+         python2.7 test.py
+diff --git a/src/test/ui/env-funky-keys.rs b/src/test/ui/env-funky-keys.rs
+index c5c824ac58d..f3fe047a79c 100644
+--- a/src/test/ui/env-funky-keys.rs
++++ b/src/test/ui/env-funky-keys.rs
+@@ -1,6 +1,7 @@
+ // run-pass
+ // Ignore this test on Android, because it segfaults there.
+ 
++// ignore-test
+ // ignore-android
+ // ignore-windows
+ // ignore-cloudabi no execve
+-- 
+2.24.1
+

diff --git a/dev-lang/rust/files/gentoo-musl-target-specs.patch b/dev-lang/rust/files/gentoo-musl-target-specs.patch
new file mode 100644
index 00000000000..0661a26841b
--- /dev/null
+++ b/dev-lang/rust/files/gentoo-musl-target-specs.patch
@@ -0,0 +1,168 @@
+From 9fb44efd4a6270443ca2a06a098c83cf9820cc8b Mon Sep 17 00:00:00 2001
+From: Georgy Yakovlev <gyakovlev@gentoo.org>
+Date: Thu, 8 Oct 2020 22:38:54 -0700
+Subject: [PATCH] add gentoo musl target specs
+
+Directly based on patch by Samuel Holland <samuel@sholland.org>
+Found at: https://github.com/smaeul/portage-overlay/blob/master/dev-lang/rust/files/
+
+Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>
+---
+ src/librustc_target/spec/aarch64_gentoo_linux_musl.rs | 11 +++++++++++
+ .../spec/armv7_gentoo_linux_musleabihf.rs             | 11 +++++++++++
+ src/librustc_target/spec/i686_gentoo_linux_musl.rs    | 11 +++++++++++
+ src/librustc_target/spec/mod.rs                       |  8 ++++++++
+ .../spec/powerpc64_gentoo_linux_musl.rs               | 11 +++++++++++
+ .../spec/powerpc64le_gentoo_linux_musl.rs             | 11 +++++++++++
+ src/librustc_target/spec/powerpc_gentoo_linux_musl.rs | 11 +++++++++++
+ src/librustc_target/spec/x86_64_gentoo_linux_musl.rs  | 11 +++++++++++
+ 8 files changed, 85 insertions(+)
+ create mode 100644 src/librustc_target/spec/aarch64_gentoo_linux_musl.rs
+ create mode 100644 src/librustc_target/spec/armv7_gentoo_linux_musleabihf.rs
+ create mode 100644 src/librustc_target/spec/i686_gentoo_linux_musl.rs
+ create mode 100644 src/librustc_target/spec/powerpc64_gentoo_linux_musl.rs
+ create mode 100644 src/librustc_target/spec/powerpc64le_gentoo_linux_musl.rs
+ create mode 100644 src/librustc_target/spec/powerpc_gentoo_linux_musl.rs
+ create mode 100644 src/librustc_target/spec/x86_64_gentoo_linux_musl.rs
+
+diff --git a/src/librustc_target/spec/aarch64_gentoo_linux_musl.rs b/src/librustc_target/spec/aarch64_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..420fe7c
+--- /dev/null
++++ b/src/librustc_target/spec/aarch64_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::aarch64_unknown_linux_musl::target()?;
++
++    base.llvm_target = "aarch64-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/armv7_gentoo_linux_musleabihf.rs b/src/librustc_target/spec/armv7_gentoo_linux_musleabihf.rs
+new file mode 100644
+index 0000000..067e2d6
+--- /dev/null
++++ b/src/librustc_target/spec/armv7_gentoo_linux_musleabihf.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::armv7_unknown_linux_musleabihf::target()?;
++
++    base.llvm_target = "armv7-gentoo-linux-musleabihf".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/i686_gentoo_linux_musl.rs b/src/librustc_target/spec/i686_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..1cd39cd
+--- /dev/null
++++ b/src/librustc_target/spec/i686_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::i686_unknown_linux_musl::target()?;
++
++    base.llvm_target = "i686-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/mod.rs b/src/librustc_target/spec/mod.rs
+index fa29ff3..a685600 100644
+--- a/src/librustc_target/spec/mod.rs
++++ b/src/librustc_target/spec/mod.rs
+@@ -490,6 +490,14 @@ macro_rules! supported_targets {
+ }
+ 
+ supported_targets! {
++    ("aarch64-gentoo-linux-musl", aarch64_gentoo_linux_musl),
++    ("armv7-gentoo-linux-musleabihf", armv7_gentoo_linux_musleabihf),
++    ("i686-gentoo-linux-musl", i686_gentoo_linux_musl),
++    ("powerpc-gentoo-linux-musl", powerpc_gentoo_linux_musl),
++    ("powerpc64-gentoo-linux-musl", powerpc64_gentoo_linux_musl),
++    ("powerpc64le-gentoo-linux-musl", powerpc64le_gentoo_linux_musl),
++    ("x86_64-gentoo-linux-musl", x86_64_gentoo_linux_musl),
++
+     ("x86_64-unknown-linux-gnu", x86_64_unknown_linux_gnu),
+     ("x86_64-unknown-linux-gnux32", x86_64_unknown_linux_gnux32),
+     ("i686-unknown-linux-gnu", i686_unknown_linux_gnu),
+diff --git a/src/librustc_target/spec/powerpc64_gentoo_linux_musl.rs b/src/librustc_target/spec/powerpc64_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..e840bb2
+--- /dev/null
++++ b/src/librustc_target/spec/powerpc64_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::powerpc64_unknown_linux_musl::target()?;
++
++    base.llvm_target = "powerpc64-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/powerpc64le_gentoo_linux_musl.rs b/src/librustc_target/spec/powerpc64le_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..1037d82
+--- /dev/null
++++ b/src/librustc_target/spec/powerpc64le_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::powerpc64le_unknown_linux_musl::target()?;
++
++    base.llvm_target = "powerpc64le-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/powerpc_gentoo_linux_musl.rs b/src/librustc_target/spec/powerpc_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..a623ffe
+--- /dev/null
++++ b/src/librustc_target/spec/powerpc_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::powerpc_unknown_linux_musl::target()?;
++
++    base.llvm_target = "powerpc-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+diff --git a/src/librustc_target/spec/x86_64_gentoo_linux_musl.rs b/src/librustc_target/spec/x86_64_gentoo_linux_musl.rs
+new file mode 100644
+index 0000000..f330473
+--- /dev/null
++++ b/src/librustc_target/spec/x86_64_gentoo_linux_musl.rs
+@@ -0,0 +1,11 @@
++use crate::spec::TargetResult;
++
++pub fn target() -> TargetResult {
++    let mut base = super::x86_64_unknown_linux_musl::target()?;
++
++    base.llvm_target = "x86_64-gentoo-linux-musl".to_string();
++    base.target_vendor = "gentoo".to_string();
++    base.options.crt_static_default = false;
++
++    Ok(base)
++}
+-- 
+2.28.0
+

diff --git a/dev-lang/rust/rust-1.47.0.ebuild b/dev-lang/rust/rust-1.47.0.ebuild
new file mode 100644
index 00000000000..bc0dd9a95b4
--- /dev/null
+++ b/dev-lang/rust/rust-1.47.0.ebuild
@@ -0,0 +1,582 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing multilib-build python-any-r1 rust-toolchain toolchain-funcs
+
+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="${BETA_SNAPSHOT}/rustc-beta-src.tar.xz"
+else
+	ABI_VER="$(ver_cut 1-2)"
+	SLOT="stable/${ABI_VER}"
+	MY_P="rustc-${PV}"
+	SRC="${MY_P}-src.tar.xz"
+	KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+fi
+
+RUST_STAGE0_VERSION="1.$(($(ver_cut 2) - 1)).0"
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+SRC_URI="
+	https://static.rust-lang.org/dist/${SRC} -> rustc-${PV}-src.tar.xz
+	!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 libressl miri nightly parallel-compiler rls rustfmt +system-bootstrap system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# 1. List all the working slots (with min versions) in ||, newest first.
+# 2. Update the := to specify *max* version, e.g. < 12.
+# 3. Specify LLVM_MAX_SLOT, e.g. 11.
+LLVM_DEPEND="
+	|| (
+		sys-devel/llvm:11[${LLVM_TARGET_USEDEPS// /,}]
+		sys-devel/llvm:10[${LLVM_TARGET_USEDEPS// /,}]
+	)
+	<sys-devel/llvm-12:=
+	wasm? ( sys-devel/lld )
+"
+LLVM_MAX_SLOT=11
+
+BOOTSTRAP_DEPEND="|| ( >=dev-lang/rust-1.$(($(ver_cut 2) - 1)) >=dev-lang/rust-bin-1.$(($(ver_cut 2) - 1)) )"
+
+BDEPEND="${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
+		dev-util/ninja
+	)
+"
+
+# libgit2 should be at least same as bundled into libgit-sys #707746
+DEPEND="
+	>=dev-libs/libgit2-0.99:=
+	net-libs/libssh2:=
+	net-libs/http-parser:=
+	net-misc/curl:=[http2,ssl]
+	sys-libs/zlib:=
+	!libressl? ( dev-libs/openssl:0= )
+	libressl? ( dev-libs/libressl:0= )
+	elibc_musl? ( sys-libs/libunwind:= )
+	system-llvm? (
+		${LLVM_DEPEND}
+	)
+"
+
+RDEPEND="${DEPEND}
+	app-eselect/eselect-rust
+"
+
+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}/${PV}/lib/lib.*.so
+	usr/lib/${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}/${PV}/lib/rustlib/.*/lib/lib.*.so
+"
+
+# causes double bootstrap
+RESTRICT="test"
+
+PATCHES=(
+	"${FILESDIR}"/1.46.0-don-t-create-prefix-at-time-of-check.patch
+	"${FILESDIR}"/1.47.0-ignore-broken-and-non-applicable-tests.patch
+	"${FILESDIR}"/gentoo-musl-target-specs.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+toml_usex() {
+	usex "$1" true false
+}
+
+boostrap_rust_version_check() {
+	# never call from pkg_pretend. eselect-rust may be not installed yet.
+	local rustc_wanted="$(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 rustc version!"
+
+	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
+	else
+		einfo "Using rust ${rustc_version} to build"
+	fi
+}
+
+pre_build_checks() {
+	local M=6144
+	M=$(( $(usex clippy 128 0) + ${M} ))
+	M=$(( $(usex miri 128 0) + ${M} ))
+	M=$(( $(usex rls 512 0) + ${M} ))
+	M=$(( $(usex rustfmt 256 0) + ${M} ))
+	M=$(( $(usex system-llvm 0 2048) + ${M} ))
+	M=$(( $(usex wasm 256 0) + ${M} ))
+	M=$(( $(usex debug 15 10) * ${M} / 10 ))
+	eshopts_push -s extglob
+	if is-flagq '-g?(gdb)?([1-9])'; then
+		M=$(( 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_${EBUILD_PHASE}
+}
+
+pkg_pretend() {
+	pre_build_checks
+}
+
+pkg_setup() {
+	pre_build_checks
+	python-any-r1_pkg_setup
+	use system-bootstrap && boostrap_rust_version_check
+
+	# required to link agains system libs, otherwise
+	# crates use bundled sources and compile own static version
+	export LIBGIT2_SYS_USE_PKG_CONFIG=1
+	export LIBSSH2_SYS_USE_PKG_CONFIG=1
+	export PKG_CONFIG_ALLOW_CROSS=1
+
+	if use system-llvm; then
+		llvm_pkg_setup
+
+		local llvm_config="$(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}/${rust_stage0}"/install.sh --disable-ldconfig \
+			--destdir="${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/' src/librustc_target/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\",$tools"
+	fi
+
+	local rust_stage0_root
+	if use system-bootstrap; then
+		rust_stage0_root="$(rustc --print sysroot)"
+	else
+		rust_stage0_root="${WORKDIR}"/rust-stage0
+	fi
+
+	rust_target="$(rust_abi)"
+
+	cat <<- EOF > "${S}"/config.toml
+		[llvm]
+		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"
+		docs = $(toml_usex doc)
+		compiler-docs = $(toml_usex doc)
+		submodules = false
+		python = "${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 = $(toml_usex debug)
+		debuginfo-level-rustc = 0
+		backtrace = true
+		incremental = false
+		default-linker = "$(tc-getCC)"
+		parallel-compiler = $(toml_usex parallel-compiler)
+		channel = "$(usex nightly nightly stable)"
+		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))
+		backtrace-on-ice = true
+		jemalloc = false
+		[dist]
+		src-tarball = false
+	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
+
+		# 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 ${cross_toolchain} cross toolchain"
+		ewarn
+		if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
+			ewarn "'sys-devel/binutils[multitarget]' is not installed"
+			ewarn "'strip' will be unable to strip cross libraries"
+			ewarn "cross targets will be installed with full debug information"
+			ewarn "enable 'multitarget' USE flag for binutils to be able to strip object files"
+			ewarn
+			ewarn "Alternatively llvm-strip can be used, it supports stripping any target"
+			ewarn "define STRIP=\"llvm-strip\" to use it (experimental)"
+			ewarn
+		fi
+	done
+	fi # I_KNOW_WHAT_I_AM_DOING_CROSS
+
+	einfo "Rust configured with the following settings:"
+	cat "${S}"/config.toml || die
+}
+
+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\
+		"${EPYTHON}" ./x.py build -vv --config="${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: ${failed[@]}"
+		die "aborting due to test failures"
+	fi
+}
+
+src_install() {
+	# https://github.com/rust-lang/rust/issues/77721
+	# also 1.46.0-don-t-create-prefix-at-time-of-check.patch
+	dodir "/usr/lib/${PN}/${PV}"
+	(
+	IFS=$'\n'
+	env $(cat "${S}"/config.env) DESTDIR="${D}" \
+		"${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml || die
+	)
+
+	# bug #689562, #689160
+	rm -v "${D}/usr/lib/${PN}/${PV}/etc/bash_completion.d/cargo" || die
+	rmdir -v "${D}/usr/lib/${PN}/${PV}"/etc{/bash_completion.d,} || die
+	dobashcomp build/tmp/dist/cargo-image/etc/bash_completion.d/cargo
+
+	local symlinks=(
+		rustc
+		rustdoc
+		rust-gdb
+		rust-gdbgui
+		rust-lldb
+		cargo
+	)
+
+	use clippy && symlinks+=( clippy-driver cargo-clippy )
+	use miri && symlinks+=( miri cargo-miri )
+	use rls && symlinks+=( rls )
+	use rustfmt && symlinks+=( rustfmt cargo-fmt )
+
+	local i
+	for i in "${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.
+		mv -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}" "${ED}/usr/lib/${PN}/${PV}/bin/${i}-${PV}" || die
+		ln -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}-${PV}" "${ED}/usr/lib/${PN}/${PV}/bin/${i}" || die
+		dosym "../lib/${PN}/${PV}/bin/${i}-${PV}" "/usr/bin/${i}-${PV}"
+	done
+	dosym "../../lib/${PN}/${PV}/share/doc" "/usr/share/doc/${P}"
+
+	newenvd - "50${P}" <<-_EOF_
+		LDPATH="${EPREFIX}/usr/lib/${PN}/${PV}/lib"
+		MANPATH="${EPREFIX}/usr/lib/${PN}/${PV}/share/man"
+		$(usex elibc_musl 'CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-C target-feature=-crt-static"' '')
+	_EOF_
+
+	rm -rf "${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-${P}"
+		/usr/bin/cargo
+		/usr/bin/rustdoc
+		/usr/bin/rust-gdb
+		/usr/bin/rust-gdbgui
+		/usr/bin/rust-lldb
+		/usr/share/doc/rust
+	EOF
+	if use clippy; then
+		echo /usr/bin/clippy-driver >> "${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-${P}"
+}
+
+pkg_postinst() {
+	eselect rust update --if-unset
+
+	elog "Rust installs a helper script for calling GDB and LLDB,"
+	elog "for your convenience it is installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+
+	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
+}