From 8cecd4291e9b191dde854e5ccaca63b6dadab3f1 Mon Sep 17 00:00:00 2001
From: Gyeongjae Choi <gyeongjae@cloudflare.com>
Date: Thu, 12 Feb 2026 23:19:03 +0900
Subject: [PATCH 1/2] Stop adding link-native-libraries flag by default in
 Emscripten platform

---
 src/compile.rs | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/src/compile.rs b/src/compile.rs
index 71b7d41e6..c45572515 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -245,16 +245,6 @@ fn cargo_build_command(
             cargo_rustc.args.extend(mac_args);
         }
     } else if target.is_emscripten() {
-        // Allow user to override these default flags
-        if !rustflags
-            .flags
-            .iter()
-            .any(|f| f.contains("link-native-libraries"))
-        {
-            debug!("Setting `-Z link-native-libraries=no` for Emscripten");
-            rustflags.push("-Z");
-            rustflags.push("link-native-libraries=no");
-        }
         let mut emscripten_args = Vec::new();
         // Allow user to override these default settings
         if !cargo_rustc

From 2456832464cdd9ac6858a0fcde0ee5e499b9176a Mon Sep 17 00:00:00 2001
From: Gyeongjae Choi <gyeongjae@cloudflare.com>
Date: Fri, 13 Feb 2026 01:11:21 +0900
Subject: [PATCH 2/2] Only set link-native-libraries flag before rust 1.93.0

---
 src/compile.rs    | 17 ++++++++++++++++-
 src/target/mod.rs |  1 +
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/compile.rs b/src/compile.rs
index c45572515..47557b875 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -1,6 +1,6 @@
 #[cfg(feature = "zig")]
 use crate::PlatformTag;
-use crate::target::RUST_1_64_0;
+use crate::target::{RUST_1_64_0, RUST_1_93_0};
 use crate::{BridgeModel, BuildContext, PythonInterpreter, Target};
 use anyhow::{Context, Result, anyhow, bail};
 use cargo_metadata::CrateType;
@@ -245,6 +245,21 @@ fn cargo_build_command(
             cargo_rustc.args.extend(mac_args);
         }
     } else if target.is_emscripten() {
+        // The -Z link-native-libraries=no flag is needed for older Rust versions
+        // where Emscripten builds fail without it due to the behavior that it links
+        // libc automatically.
+        // From Rust 1.93.0, it is possible to build Emscripten with stable toolchain
+        // and this flag can be and should be removed.
+        if target.rustc_version.semver < RUST_1_93_0
+            && !rustflags
+                .flags
+                .iter()
+                .any(|f| f.contains("link-native-libraries"))
+        {
+            debug!("Setting `-Z link-native-libraries=no` for Emscripten (rust < 1.93.0)");
+            rustflags.push("-Z");
+            rustflags.push("link-native-libraries=no");
+        }
         let mut emscripten_args = Vec::new();
         // Allow user to override these default settings
         if !cargo_rustc
diff --git a/src/target/mod.rs b/src/target/mod.rs
index 8838d84a5..d15a58ec9 100644
--- a/src/target/mod.rs
+++ b/src/target/mod.rs
@@ -23,6 +23,7 @@ mod pypi_tags;
 pub use pypi_tags::{is_arch_supported_by_pypi, validate_wheel_filename_for_pypi};
 
 pub(crate) const RUST_1_64_0: semver::Version = semver::Version::new(1, 64, 0);
+pub(crate) const RUST_1_93_0: semver::Version = semver::Version::new(1, 93, 0);
 
 /// All supported operating system
 #[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, Deserialize)]