+
+[profile.release.package.compiler_builtins]
+# The compiler-builtins crate cannot reference libcore, and it's own CI will
+# verify that this is the case. This requires, however, that the crate is built
+# without overflow checks and debug assertions. Forcefully disable debug
+# assertions and overflow checks here which should ensure that even if these
+# assertions are enabled for libstd we won't enable then for compiler_builtins
+# which should ensure we still link everything correctly.
+debug-assertions = false
+overflow-checks = false
+
+# For compiler-builtins we always use a high number of codegen units.
+# The goal here is to place every single intrinsic into its own object
+# file to avoid symbol clashes with the system libgcc if possible. Note
+# that this number doesn't actually produce this many object files, we
+# just don't create more than this number of object files.
+#
+# It's a bit of a bummer that we have to pass this here, unfortunately.
+# Ideally this would be specified through an env var to Cargo so Cargo
+# knows how many CGUs are for this specific crate, but for now
+# per-crate configuration isn't specifiable in the environment.
+codegen-units = 10000
+
+[profile.release.package.rustc-rayon-core]
+# The rustc fork of Rayon has deadlock detection code which intermittently
+# causes overflows in the CI (see https://github.com/rust-lang/rust/issues/90227)
+# so we turn overflow checks off for now.
+# FIXME: This workaround should be removed once #90227 is fixed.
+overflow-checks = false
+
+# These dependencies of the standard library implement symbolication for
+# backtraces on most platforms. Their debuginfo causes both linking to be slower
+# (more data to chew through) and binaries to be larger without really all that
+# much benefit. This section turns them all to down to have no debuginfo which
+# helps to improve link times a little bit.
+[profile.release.package]
+addr2line.debug = 0
+adler.debug = 0
+gimli.debug = 0
+miniz_oxide.debug = 0
+object.debug = 0
+
+# The only package that ever uses debug builds is bootstrap.
+# We care a lot about bootstrap's compile times, so don't include debug info for
+# dependencies, only bootstrap itself.
+[profile.dev]
+debug = 0
+[profile.dev.package]
+# Only use debuginfo=1 to further reduce compile times.
+bootstrap.debug = 1
+
+# We want the RLS to use the version of Cargo that we've got vendored in this
+# repository to ensure that the same exact version of Cargo is used by both the
+# RLS and the Cargo binary itself. The RLS depends on Cargo as a git repository
+# so we use a `[patch]` here to override the github repository with our local
+# vendored copy.
+[patch."https://github.com/rust-lang/cargo"]
+cargo = { path = "src/tools/cargo" }
+cargo-util = { path = "src/tools/cargo/crates/cargo-util" }
+
+[patch."https://github.com/rust-lang/rustfmt"]
+# Similar to Cargo above we want the RLS to use a vendored version of `rustfmt`
+# that we're shipping as well (to ensure that the rustfmt in RLS and the
+# `rustfmt` executable are the same exact version).
+rustfmt-nightly = { path = "src/tools/rustfmt" }
+
+[patch.crates-io]
+# See comments in `src/tools/rustc-workspace-hack/README.md` for what's going on
+# here
+rustc-workspace-hack = { path = 'src/tools/rustc-workspace-hack' }
+
+# See comments in `library/rustc-std-workspace-core/README.md` for what's going on
+# here
+rustc-std-workspace-core = { path = 'library/rustc-std-workspace-core' }
+rustc-std-workspace-alloc = { path = 'library/rustc-std-workspace-alloc' }
+rustc-std-workspace-std = { path = 'library/rustc-std-workspace-std' }
+
+[patch."https://github.com/rust-lang/rust-clippy"]
+clippy_lints = { path = "src/tools/clippy/clippy_lints" }