Merge branch 'bugfix/cmakev2-coredump-default-component_v6.1' into 'release/v6.1'

fix(cmakev2): include config-selected default components (v6.1)

See merge request espressif/esp-idf!51930

tools/test_build_system/buildv2/test_default_components.py

@@ -0,0 +1,34 @@
+# SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+import json
+import logging
+from pathlib import Path
+
+import pytest
+from test_build_system_helpers import IdfPyFunc
+
+
+@pytest.mark.usefixtures('test_app_copy')
+def test_config_selected_default_components(idf_py: IdfPyFunc) -> None:
+    """Components with a project_include.cmake that calls idf_project_add_default_build_component()
+    must be pulled into the default build when their Kconfig feature is enabled, even though nothing
+    in the project explicitly depends on them.
+
+    Enable coredump and gdbstub via sdkconfig.defaults, build, and assert both components end up in
+    build_components.
+    """
+    logging.info('Testing config-selected default components (coredump, gdbstub)')
+
+    # Coredump to UART (no dedicated coredump partition needed) and runtime gdbstub.
+    Path('sdkconfig.defaults').write_text('CONFIG_ESP_COREDUMP_ENABLE_TO_UART=y\nCONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME=y\n')
+
+    idf_py('build')
+
+    proj_desc = json.loads(Path('build/project_description.json').read_text())
+    build_components = proj_desc.get('build_components', [])
+
+    for comp in ('espcoredump', 'esp_gdbstub'):
+        assert comp in build_components, (
+            f'{comp} should be added as a default build component when its feature is enabled, '
+            f'got build_components: {build_components}'
+        )