From c42e7c8012bc906fecb3c030221dc5bef51761a6 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Fri, 17 Mar 2023 17:34:46 -0700
Subject: [PATCH] Reflect serde_derive required compiler in build script and
 rust-version metadata

---
 serde/build.rs                    | 10 +++++-----
 serde_derive/Cargo.toml           |  2 +-
 serde_derive_internals/Cargo.toml |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/serde/build.rs b/serde/build.rs
index 304a6c761..929d8e172 100644
--- a/serde/build.rs
+++ b/serde/build.rs
@@ -78,11 +78,6 @@ fn main() {
         println!("cargo:rustc-cfg=no_num_nonzero");
     }
 
-    // Current minimum supported version of serde_derive crate is Rust 1.31.
-    if minor < 31 {
-        println!("cargo:rustc-cfg=no_serde_derive");
-    }
-
     // TryFrom, Atomic types, non-zero signed integers, and SystemTime::checked_add
     // stabilized in Rust 1.34:
     // https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html#tryfrom-and-tryinto
@@ -94,6 +89,11 @@ fn main() {
         println!("cargo:rustc-cfg=no_relaxed_trait_bounds");
     }
 
+    // Current minimum supported version of serde_derive crate is Rust 1.56.
+    if minor < 56 {
+        println!("cargo:rustc-cfg=no_serde_derive");
+    }
+
     // Support for #[cfg(target_has_atomic = "...")] stabilized in Rust 1.60.
     if minor < 60 {
         println!("cargo:rustc-cfg=no_target_has_atomic");
diff --git a/serde_derive/Cargo.toml b/serde_derive/Cargo.toml
index b9e40c1f2..7272c744e 100644
--- a/serde_derive/Cargo.toml
+++ b/serde_derive/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["serde", "serialization", "no_std", "derive"]
 license = "MIT OR Apache-2.0"
 readme = "crates-io.md"
 repository = "https://github.com/serde-rs/serde"
-rust-version = "1.31"
+rust-version = "1.56"
 
 [features]
 default = []
diff --git a/serde_derive_internals/Cargo.toml b/serde_derive_internals/Cargo.toml
index 5bb3acd58..27c5f4e2a 100644
--- a/serde_derive_internals/Cargo.toml
+++ b/serde_derive_internals/Cargo.toml
@@ -9,7 +9,7 @@ include = ["lib.rs", "src/**/*.rs", "LICENSE-APACHE", "LICENSE-MIT"]
 keywords = ["serde", "serialization"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/serde-rs/serde"
-rust-version = "1.31"
+rust-version = "1.56"
 
 [lib]
 path = "lib.rs"