diff --git a/Cargo.lock b/Cargo.lock
index 082bb4be93c0..f7acd49a84ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4479,7 +4479,6 @@ dependencies = [
 name = "rustc_session"
 version = "0.0.0"
 dependencies = [
- "bitflags 1.3.2",
  "getopts",
  "libc",
  "rustc_ast",
diff --git a/compiler/rustc_session/Cargo.toml b/compiler/rustc_session/Cargo.toml
index e26d25d9a412..3af83aaaaa8a 100644
--- a/compiler/rustc_session/Cargo.toml
+++ b/compiler/rustc_session/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.0.0"
 edition = "2021"
 
 [dependencies]
-bitflags = "1.2.1"
 getopts = "0.2"
 rustc_macros = { path = "../rustc_macros" }
 tracing = "0.1"
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 2ea202de820a..5e46a86f1ff6 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -12,6 +12,7 @@
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::stable_hasher::{StableOrd, ToStableHashKey};
 use rustc_target::abi::Align;
+use rustc_target::spec::LinkSelfContainedComponents;
 use rustc_target::spec::{PanicStrategy, RelocModel, SanitizerSet, SplitDebuginfo};
 use rustc_target::spec::{Target, TargetTriple, TargetWarnings, TARGETS};
 
@@ -236,41 +237,6 @@ pub struct LinkSelfContained {
     components: LinkSelfContainedComponents,
 }
 
-bitflags::bitflags! {
-    #[derive(Default)]
-    /// The `-C link-self-contained` components that can individually be enabled or disabled.
-    pub struct LinkSelfContainedComponents: u8 {
-        /// CRT objects (e.g. on `windows-gnu`, `musl`, `wasi` targets)
-        const CRT_OBJECTS = 1 << 0;
-        /// libc static library (e.g. on `musl`, `wasi` targets)
-        const LIBC        = 1 << 1;
-        /// libgcc/libunwind (e.g. on `windows-gnu`, `fuchsia`, `fortanix`, `gnullvm` targets)
-        const UNWIND      = 1 << 2;
-        /// Linker, dlltool, and their necessary libraries (e.g. on `windows-gnu` and for `rust-lld`)
-        const LINKER      = 1 << 3;
-        /// Sanitizer runtime libraries
-        const SANITIZERS  = 1 << 4;
-        /// Other MinGW libs and Windows import libs
-        const MINGW       = 1 << 5;
-    }
-}
-
-impl FromStr for LinkSelfContainedComponents {
-    type Err = ();
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(match s {
-            "crto" => LinkSelfContainedComponents::CRT_OBJECTS,
-            "libc" => LinkSelfContainedComponents::LIBC,
-            "unwind" => LinkSelfContainedComponents::UNWIND,
-            "linker" => LinkSelfContainedComponents::LINKER,
-            "sanitizers" => LinkSelfContainedComponents::SANITIZERS,
-            "mingw" => LinkSelfContainedComponents::MINGW,
-            _ => return Err(()),
-        })
-    }
-}
-
 impl LinkSelfContained {
     /// Incorporates an enabled or disabled component as specified on the CLI, if possible.
     /// For example: `+linker`, and `-crto`.
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 16ef78629806..40d92bd53876 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -520,6 +520,41 @@ fn to_json(&self) -> Json {
     }
 }
 
+bitflags::bitflags! {
+    #[derive(Default)]
+    /// The `-C link-self-contained` components that can individually be enabled or disabled.
+    pub struct LinkSelfContainedComponents: u8 {
+        /// CRT objects (e.g. on `windows-gnu`, `musl`, `wasi` targets)
+        const CRT_OBJECTS = 1 << 0;
+        /// libc static library (e.g. on `musl`, `wasi` targets)
+        const LIBC        = 1 << 1;
+        /// libgcc/libunwind (e.g. on `windows-gnu`, `fuchsia`, `fortanix`, `gnullvm` targets)
+        const UNWIND      = 1 << 2;
+        /// Linker, dlltool, and their necessary libraries (e.g. on `windows-gnu` and for `rust-lld`)
+        const LINKER      = 1 << 3;
+        /// Sanitizer runtime libraries
+        const SANITIZERS  = 1 << 4;
+        /// Other MinGW libs and Windows import libs
+        const MINGW       = 1 << 5;
+    }
+}
+
+impl FromStr for LinkSelfContainedComponents {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "crto" => LinkSelfContainedComponents::CRT_OBJECTS,
+            "libc" => LinkSelfContainedComponents::LIBC,
+            "unwind" => LinkSelfContainedComponents::UNWIND,
+            "linker" => LinkSelfContainedComponents::LINKER,
+            "sanitizers" => LinkSelfContainedComponents::SANITIZERS,
+            "mingw" => LinkSelfContainedComponents::MINGW,
+            _ => return Err(()),
+        })
+    }
+}
+
 #[derive(Clone, Copy, Debug, PartialEq, Hash, Encodable, Decodable, HashStable_Generic)]
 pub enum PanicStrategy {
     Unwind,