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similarity index 100%
rename from library/compiler-builtins/libm/crates/libm-test/tests/multiprecision.rs
rename to library/compiler-builtins/libm-test/tests/multiprecision.rs
diff --git a/library/compiler-builtins/libm/crates/libm-test/tests/standalone.rs b/library/compiler-builtins/libm-test/tests/standalone.rs
similarity index 100%
rename from library/compiler-builtins/libm/crates/libm-test/tests/standalone.rs
rename to library/compiler-builtins/libm-test/tests/standalone.rs
diff --git a/library/compiler-builtins/libm/crates/libm-test/tests/u256.rs b/library/compiler-builtins/libm-test/tests/u256.rs
similarity index 100%
rename from library/compiler-builtins/libm/crates/libm-test/tests/u256.rs
rename to library/compiler-builtins/libm-test/tests/u256.rs
diff --git a/library/compiler-builtins/libm/crates/libm-test/tests/z_extensive/main.rs b/library/compiler-builtins/libm-test/tests/z_extensive/main.rs
similarity index 100%
rename from library/compiler-builtins/libm/crates/libm-test/tests/z_extensive/main.rs
rename to library/compiler-builtins/libm-test/tests/z_extensive/main.rs
diff --git a/library/compiler-builtins/libm/crates/libm-test/tests/z_extensive/run.rs b/library/compiler-builtins/libm-test/tests/z_extensive/run.rs
similarity index 100%
rename from library/compiler-builtins/libm/crates/libm-test/tests/z_extensive/run.rs
rename to library/compiler-builtins/libm-test/tests/z_extensive/run.rs
diff --git a/library/compiler-builtins/libm/LICENSE.txt b/library/compiler-builtins/libm/LICENSE.txt
deleted file mode 100644
index 2f8e41f14747..000000000000
--- a/library/compiler-builtins/libm/LICENSE.txt
+++ /dev/null
@@ -1,258 +0,0 @@
-rust-lang/libm as a whole is available for use under the MIT license:
-
-------------------------------------------------------------------------------
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
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-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
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-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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-As a contributor, you agree that your code can be used under either the MIT
-license or the Apache-2.0 license:
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-This Rust library contains the following copyrights:
-
-    Copyright (c) 2018 Jorge Aparicio
-
-Portions of this software are derived from third-party works licensed under
-terms compatible with the above MIT license:
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-* musl libc https://www.musl-libc.org/. This library contains the following
-  copyright:
-
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-
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-
-The musl libc COPYRIGHT file also includes the following notice relevant to
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-
-------------------------------------------------------------------------------
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-and labelled as such in comments in the individual source files. All
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diff --git a/library/compiler-builtins/libm/README.md b/library/compiler-builtins/libm/README.md
deleted file mode 100644
index 52d760a4f159..000000000000
--- a/library/compiler-builtins/libm/README.md
+++ /dev/null
@@ -1,56 +0,0 @@
-# `libm`
-
-A port of [MUSL]'s libm to Rust.
-
-[MUSL]: https://musl.libc.org/
-
-## Goals
-
-The short term goal of this library is to [enable math support (e.g. `sin`, `atan2`) for the
-`wasm32-unknown-unknown` target][wasm] (cf. [rust-lang/compiler-builtins][pr]). The longer
-term goal is to enable [math support in the `core` crate][core].
-
-[wasm]: https://github.com/rust-lang/libm/milestone/1
-[pr]: https://github.com/rust-lang/compiler-builtins/pull/248
-[core]: https://github.com/rust-lang/libm/milestone/2
-
-## Already usable
-
-This crate is [on crates.io] and can be used today in stable `#![no_std]` programs.
-
-The API documentation can be found [here](https://docs.rs/libm).
-
-[on crates.io]: https://crates.io/crates/libm
-
-## Benchmark
-[benchmark]: #benchmark
-
-The benchmarks are located in `crates/libm-bench` and require a nightly Rust toolchain.
-To run all benchmarks:
-
-> cargo +nightly bench --all
-
-## Contributing
-
-Please check [CONTRIBUTING.md](CONTRIBUTING.md)
-
-## Minimum Rust version policy
-
-This crate supports rustc 1.63 and newer.
-
-## License
-
-Usage is licensed under the MIT license ([LICENSE-MIT](LICENSE-MIT) or
-https://opensource.org/licenses/MIT).
-
-
-### Contribution
-
-Contributions are licensed under both the MIT license and the Apache License,
-Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
-https://www.apache.org/licenses/LICENSE-2.0). Unless you explicitly state
-otherwise, any contribution intentionally submitted for inclusion in the work
-by you, as defined in the Apache-2.0 license, shall be dual licensed as
-mentioned, without any additional terms or conditions.
-
-See `LICENSE.txt` for full details.
diff --git a/library/compiler-builtins/libm/crates/musl-math-sys/musl b/library/compiler-builtins/libm/crates/musl-math-sys/musl
deleted file mode 160000
index 61399d4bd02a..000000000000
--- a/library/compiler-builtins/libm/crates/musl-math-sys/musl
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 61399d4bd02ae1ec03068445aa7ffe9174466bfd
diff --git a/library/compiler-builtins/libm/libm/LICENSE.txt b/library/compiler-builtins/libm/libm/LICENSE.txt
deleted file mode 120000
index 4ab43736a839..000000000000
--- a/library/compiler-builtins/libm/libm/LICENSE.txt
+++ /dev/null
@@ -1 +0,0 @@
-../LICENSE.txt
\ No newline at end of file
diff --git a/library/compiler-builtins/libm/libm/LICENSE.txt b/library/compiler-builtins/libm/libm/LICENSE.txt
new file mode 100644
index 000000000000..2f8e41f14747
--- /dev/null
+++ b/library/compiler-builtins/libm/libm/LICENSE.txt
@@ -0,0 +1,258 @@
+rust-lang/libm as a whole is available for use under the MIT license:
+
+------------------------------------------------------------------------------
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+
+As a contributor, you agree that your code can be used under either the MIT
+license or the Apache-2.0 license:
+
+------------------------------------------------------------------------------
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
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+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
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+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
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+      this License, each Contributor hereby grants to You a perpetual,
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+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
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+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+------------------------------------------------------------------------------
+
+This Rust library contains the following copyrights:
+
+    Copyright (c) 2018 Jorge Aparicio
+
+Portions of this software are derived from third-party works licensed under
+terms compatible with the above MIT license:
+
+* musl libc https://www.musl-libc.org/. This library contains the following
+  copyright:
+
+      Copyright © 2005-2020 Rich Felker, et al.
+
+* The CORE-MATH project https://core-math.gitlabpages.inria.fr/. CORE-MATH
+  routines are available under the MIT license on a per-file basis.
+
+The musl libc COPYRIGHT file also includes the following notice relevant to
+math portions of the library:
+
+------------------------------------------------------------------------------
+Much of the math library code (src/math/* and src/complex/*) is
+Copyright © 1993,2004 Sun Microsystems or
+Copyright © 2003-2011 David Schultz or
+Copyright © 2003-2009 Steven G. Kargl or
+Copyright © 2003-2009 Bruce D. Evans or
+Copyright © 2008 Stephen L. Moshier or
+Copyright © 2017-2018 Arm Limited
+and labelled as such in comments in the individual source files. All
+have been licensed under extremely permissive terms.
+------------------------------------------------------------------------------
+
+Copyright notices are retained in src/* files where relevant.
diff --git a/library/compiler-builtins/libm/libm/README.md b/library/compiler-builtins/libm/libm/README.md
deleted file mode 120000
index 32d46ee883b5..000000000000
--- a/library/compiler-builtins/libm/libm/README.md
+++ /dev/null
@@ -1 +0,0 @@
-../README.md
\ No newline at end of file
diff --git a/library/compiler-builtins/libm/libm/README.md b/library/compiler-builtins/libm/libm/README.md
new file mode 100644
index 000000000000..52d760a4f159
--- /dev/null
+++ b/library/compiler-builtins/libm/libm/README.md
@@ -0,0 +1,56 @@
+# `libm`
+
+A port of [MUSL]'s libm to Rust.
+
+[MUSL]: https://musl.libc.org/
+
+## Goals
+
+The short term goal of this library is to [enable math support (e.g. `sin`, `atan2`) for the
+`wasm32-unknown-unknown` target][wasm] (cf. [rust-lang/compiler-builtins][pr]). The longer
+term goal is to enable [math support in the `core` crate][core].
+
+[wasm]: https://github.com/rust-lang/libm/milestone/1
+[pr]: https://github.com/rust-lang/compiler-builtins/pull/248
+[core]: https://github.com/rust-lang/libm/milestone/2
+
+## Already usable
+
+This crate is [on crates.io] and can be used today in stable `#![no_std]` programs.
+
+The API documentation can be found [here](https://docs.rs/libm).
+
+[on crates.io]: https://crates.io/crates/libm
+
+## Benchmark
+[benchmark]: #benchmark
+
+The benchmarks are located in `crates/libm-bench` and require a nightly Rust toolchain.
+To run all benchmarks:
+
+> cargo +nightly bench --all
+
+## Contributing
+
+Please check [CONTRIBUTING.md](CONTRIBUTING.md)
+
+## Minimum Rust version policy
+
+This crate supports rustc 1.63 and newer.
+
+## License
+
+Usage is licensed under the MIT license ([LICENSE-MIT](LICENSE-MIT) or
+https://opensource.org/licenses/MIT).
+
+
+### Contribution
+
+Contributions are licensed under both the MIT license and the Apache License,
+Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+https://www.apache.org/licenses/LICENSE-2.0). Unless you explicitly state
+otherwise, any contribution intentionally submitted for inclusion in the work
+by you, as defined in the Apache-2.0 license, shall be dual licensed as
+mentioned, without any additional terms or conditions.
+
+See `LICENSE.txt` for full details.