Merge pull request #1423 from lazka/mingw-support

Support building with Mingw Python

CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fix support for using `r#raw_idents` as argument names in pyfunctions. [#1383](https://github.com/PyO3/pyo3/pull/1383)
 - Fix unqualified `Result` usage in `pyobject_native_type_base`. [#1402](https://github.com/PyO3/pyo3/pull/1402)
 - Fix build on systems where the default Python encoding is not UTF-8. [#1405](https://github.com/PyO3/pyo3/pull/1405)
+- Fix build on mingw / MSYS2. [#1423](https://github.com/PyO3/pyo3/pull/1423)
 
 ## [0.13.1] - 2021-01-10
 ### Added

build.rs

@@ -598,17 +598,25 @@ fn run_python_script(interpreter: &Path, script: &str) -> Result<String> {
 
 fn get_rustc_link_lib(config: &InterpreterConfig) -> String {
     let link_name = if env::var("CARGO_CFG_TARGET_OS").unwrap().as_str() == "windows" {
-        // Link against python3.lib for the stable ABI on Windows.
-        // See https://www.python.org/dev/peps/pep-0384/#linkage
-        //
-        // This contains only the limited ABI symbols.
-        if env::var_os("CARGO_FEATURE_ABI3").is_some() {
-            "pythonXY:python3".to_owned()
-        } else {
+        if env::var("CARGO_CFG_TARGET_ENV").unwrap().as_str() == "gnu" {
+            // https://packages.msys2.org/base/mingw-w64-python
             format!(
-                "pythonXY:python{}{}",
+                "pythonXY:python{}.{}",
                 config.version.major, config.version.minor
             )
+        } else {
+            // Link against python3.lib for the stable ABI on Windows.
+            // See https://www.python.org/dev/peps/pep-0384/#linkage
+            //
+            // This contains only the limited ABI symbols.
+            if env::var_os("CARGO_FEATURE_ABI3").is_some() {
+                "pythonXY:python3".to_owned()
+            } else {
+                format!(
+                    "pythonXY:python{}{}",
+                    config.version.major, config.version.minor
+                )
+            }
         }
     } else {
         match config.version.implementation {