From 03f01f5a866133e873124d9a22afc059d9d85063 Mon Sep 17 00:00:00 2001
From: messense <messense@icloud.com>
Date: Fri, 17 Feb 2023 12:21:05 +0800
Subject: [PATCH] Use default `ext_suffix` for Emscripten target if not
 provided in `PYO3_CONFIG_FILE`

---
 Changelog.md                     |  1 +
 src/python_interpreter/config.rs | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/Changelog.md b/Changelog.md
index e3e928bcd..03174967f 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Add support for custom TLS certificate authority bundle in [#1483](https://github.com/PyO3/maturin/pull/1483)
 * Add support for Emscripten in `generate-ci` command in [#1484](https://github.com/PyO3/maturin/pull/1484)
 * Add support for linking with pyo3 in abi3 debug mode on Windows in [#1487](https://github.com/PyO3/maturin/pull/1487)
+* Use default `ext_suffix` for Emscripten target if not provided in `PYO3_CONFIG_FILE` in [#1491](https://github.com/PyO3/maturin/pull/1491)
 
 ## [0.14.13] - 2023-02-12
 
diff --git a/src/python_interpreter/config.rs b/src/python_interpreter/config.rs
index 4473f7e8e..feec2848a 100644
--- a/src/python_interpreter/config.rs
+++ b/src/python_interpreter/config.rs
@@ -198,6 +198,16 @@ impl InterpreterConfig {
                     )
                 }),
             }
+        } else if target.is_emscripten() && matches!(interpreter_kind, InterpreterKind::CPython) {
+            ext_suffix.unwrap_or_else(|| {
+                format!(
+                    ".cpython-{}-{}-{}.{}",
+                    abi_tag,
+                    target.get_python_arch(),
+                    target.get_python_os(),
+                    file_ext
+                )
+            })
         } else {
             ext_suffix.context("missing value for ext_suffix")?
         };