Linux Fixes

Author: Behemyth

cppython/plugins/conan/plugin.py

@@ -283,9 +283,12 @@ def _create_cmake_sync_data(self) -> CMakeSyncData:
         Returns:
             CMakeSyncData configured for Conan integration
         """
-        # With tools.cmake.cmake_layout:build_folder=. and --output-folder=build_path,
-        # generators are placed directly in build_path/generators/
-        conan_toolchain_path = self.core_data.cppython_data.build_path / 'generators' / 'conan_toolchain.cmake'
+        # With cmake_layout, Conan creates a subfolder for each build type.
+        # Use the first build type for the toolchain path.
+        build_type = self.data.build_types[0] if self.data.build_types else 'Release'
+        conan_toolchain_path = (
+            self.core_data.cppython_data.build_path / build_type / 'generators' / 'conan_toolchain.cmake'
+        )
 
         return CMakeSyncData(
             provider_name=TypeName('conan'),

tests/integration/examples/test_conan_cmake.py

@@ -11,6 +11,7 @@
 from pathlib import Path
 from tomllib import loads
 
+import pytest
 from typer.testing import CliRunner
 
 from cppython.build import build_wheel
@@ -20,6 +21,11 @@
 
 pytest_plugins = ['tests.fixtures.example', 'tests.fixtures.conan', 'tests.fixtures.cmake']
 
+# C++20 modules require Ninja or Visual Studio generator, not Unix Makefiles
+_skip_modules_test = pytest.mark.skipif(
+    sys.platform != 'win32', reason='C++20 modules require Ninja or Visual Studio generator, not Unix Makefiles.'
+)
+
 
 class TestConanCMake:
     """Test project variation of conan and CMake"""
@@ -47,7 +53,7 @@ def _run_cmake_configure(cmake_binary: str) -> None:
         Args:
             cmake_binary: Path or command name for the CMake binary to use
         """
-        result = subprocess.run([cmake_binary, '--preset=default'], capture_output=True, text=True, check=False)
+        result = subprocess.run([cmake_binary, '--preset=default-release'], capture_output=True, text=True, check=False)
         assert result.returncode == 0, f'CMake configuration failed: {result.stderr}'
 
     @staticmethod
@@ -108,6 +114,7 @@ def test_simple(example_runner: CliRunner) -> None:
         publish_project.publish()
 
     @staticmethod
+    @_skip_modules_test
     def test_library(example_runner: CliRunner) -> None:
         """Test library creation and packaging workflow"""
         # Read cmake_binary from the current pyproject.toml (we're in the example directory)