diff --git a/library/compiler-builtins/CHANGELOG.md b/library/compiler-builtins/CHANGELOG.md
deleted file mode 100644
index 763b0e10ed00..000000000000
--- a/library/compiler-builtins/CHANGELOG.md
+++ /dev/null
@@ -1,108 +0,0 @@
-# Changelog
-
-All notable changes to this project will be documented in this file.
-
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
-and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
-
-## [Unreleased]
-
-## [0.1.151](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.150...compiler_builtins-v0.1.151) - 2025-03-05
-
-### Other
-
-- Add cygwin support
-- Enable `f16` for LoongArch ([#770](https://github.com/rust-lang/compiler-builtins/pull/770))
-- Add __extendhfdf2 and add __truncdfhf2 test
-- Remove outdated information from the readme
-
-## [0.1.150](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.149...compiler_builtins-v0.1.150) - 2025-03-01
-
-### Other
-
-- Disable `f16` on AArch64 without the `neon` feature
-- Update LLVM downloads to 20.1-2025-02-13
-
-## [0.1.149](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.148...compiler_builtins-v0.1.149) - 2025-02-25
-
-### Other
-
-- Make a subset of `libm` symbols weakly available on all platforms
-
-## [0.1.148](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.147...compiler_builtins-v0.1.148) - 2025-02-24
-
-### Other
-
-- Update the `libm` submodule
-- Enable `f16` for MIPS
-- Eliminate the use of `public_test_dep!` for a third time
-
-## [0.1.147](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.146...compiler_builtins-v0.1.147) - 2025-02-19
-
-### Other
-
-- remove win64_128bit_abi_hack
-
-## [0.1.146](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.145...compiler_builtins-v0.1.146) - 2025-02-06
-
-### Other
-
-- Expose erf{,c}{,f} from libm
-
-## [0.1.145](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.144...compiler_builtins-v0.1.145) - 2025-02-04
-
-### Other
-
-- Revert "Eliminate the use of `public_test_dep!`"
-- Indentation fix to please clippy
-- Don't build out of line atomics support code for uefi
-- Add a version to some FIXMEs that will be resolved in LLVM 20
-- Remove use of the `start` feature
-
-## [0.1.144](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.143...compiler_builtins-v0.1.144) - 2025-01-15
-
-### Other
-
-- Eliminate the use of `public_test_dep!`
-
-## [0.1.143](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.142...compiler_builtins-v0.1.143) - 2025-01-15
-
-### Other
-
-- Use a C-safe return type for `__rust_[ui]128_*` overflowing intrinsics
-
-## [0.1.142](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.141...compiler_builtins-v0.1.142) - 2025-01-07
-
-### Other
-
-- Account for optimization levels other than numbers
-
-## [0.1.141](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.140...compiler_builtins-v0.1.141) - 2025-01-07
-
-### Other
-
-- Update the `libm` submodule
-- Fix new `clippy::precedence` errors
-- Rename `EXP_MAX` to `EXP_SAT`
-- Shorten prefixes for float constants
-
-## [0.1.140](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.139...compiler_builtins-v0.1.140) - 2024-12-26
-
-### Other
-
-- Disable f128 for amdgpu ([#737](https://github.com/rust-lang/compiler-builtins/pull/737))
-- Fix a bug in `abs_diff`
-- Disable `f16` on platforms that have recursion problems
-
-## [0.1.139](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.138...compiler_builtins-v0.1.139) - 2024-11-03
-
-### Other
-
-- Remove incorrect `sparcv9` match pattern from `configure_f16_f128`
-
-## [0.1.138](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.137...compiler_builtins-v0.1.138) - 2024-11-01
-
-### Other
-
-- Use `f16_enabled`/`f128_enabled` in `examples/intrinsics.rs` ([#724](https://github.com/rust-lang/compiler-builtins/pull/724))
-- Disable `f16` for LoongArch64 ([#722](https://github.com/rust-lang/compiler-builtins/pull/722))
diff --git a/library/compiler-builtins/compiler-builtins/CHANGELOG.md b/library/compiler-builtins/compiler-builtins/CHANGELOG.md
index 3450da99202f..34b413a86831 100644
--- a/library/compiler-builtins/compiler-builtins/CHANGELOG.md
+++ b/library/compiler-builtins/compiler-builtins/CHANGELOG.md
@@ -48,3 +48,103 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Remove use of `atomic_load_unordered` and undefined behaviour from `arm_linux.rs`
 - Switch repository layout to use a virtual manifest
+
+## [0.1.151](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.150...compiler_builtins-v0.1.151) - 2025-03-05
+
+### Other
+
+- Add cygwin support
+- Enable `f16` for LoongArch ([#770](https://github.com/rust-lang/compiler-builtins/pull/770))
+- Add __extendhfdf2 and add __truncdfhf2 test
+- Remove outdated information from the readme
+
+## [0.1.150](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.149...compiler_builtins-v0.1.150) - 2025-03-01
+
+### Other
+
+- Disable `f16` on AArch64 without the `neon` feature
+- Update LLVM downloads to 20.1-2025-02-13
+
+## [0.1.149](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.148...compiler_builtins-v0.1.149) - 2025-02-25
+
+### Other
+
+- Make a subset of `libm` symbols weakly available on all platforms
+
+## [0.1.148](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.147...compiler_builtins-v0.1.148) - 2025-02-24
+
+### Other
+
+- Update the `libm` submodule
+- Enable `f16` for MIPS
+- Eliminate the use of `public_test_dep!` for a third time
+
+## [0.1.147](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.146...compiler_builtins-v0.1.147) - 2025-02-19
+
+### Other
+
+- remove win64_128bit_abi_hack
+
+## [0.1.146](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.145...compiler_builtins-v0.1.146) - 2025-02-06
+
+### Other
+
+- Expose erf{,c}{,f} from libm
+
+## [0.1.145](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.144...compiler_builtins-v0.1.145) - 2025-02-04
+
+### Other
+
+- Revert "Eliminate the use of `public_test_dep!`"
+- Indentation fix to please clippy
+- Don't build out of line atomics support code for uefi
+- Add a version to some FIXMEs that will be resolved in LLVM 20
+- Remove use of the `start` feature
+
+## [0.1.144](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.143...compiler_builtins-v0.1.144) - 2025-01-15
+
+### Other
+
+- Eliminate the use of `public_test_dep!`
+
+## [0.1.143](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.142...compiler_builtins-v0.1.143) - 2025-01-15
+
+### Other
+
+- Use a C-safe return type for `__rust_[ui]128_*` overflowing intrinsics
+
+## [0.1.142](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.141...compiler_builtins-v0.1.142) - 2025-01-07
+
+### Other
+
+- Account for optimization levels other than numbers
+
+## [0.1.141](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.140...compiler_builtins-v0.1.141) - 2025-01-07
+
+### Other
+
+- Update the `libm` submodule
+- Fix new `clippy::precedence` errors
+- Rename `EXP_MAX` to `EXP_SAT`
+- Shorten prefixes for float constants
+
+## [0.1.140](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.139...compiler_builtins-v0.1.140) - 2024-12-26
+
+### Other
+
+- Disable f128 for amdgpu ([#737](https://github.com/rust-lang/compiler-builtins/pull/737))
+- Fix a bug in `abs_diff`
+- Disable `f16` on platforms that have recursion problems
+
+## [0.1.139](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.138...compiler_builtins-v0.1.139) - 2024-11-03
+
+### Other
+
+- Remove incorrect `sparcv9` match pattern from `configure_f16_f128`
+
+## [0.1.138](https://github.com/rust-lang/compiler-builtins/compare/compiler_builtins-v0.1.137...compiler_builtins-v0.1.138) - 2024-11-01
+
+### Other
+
+- Use `f16_enabled`/`f128_enabled` in `examples/intrinsics.rs` ([#724](https://github.com/rust-lang/compiler-builtins/pull/724))
+- Disable `f16` for LoongArch64 ([#722](https://github.com/rust-lang/compiler-builtins/pull/722))