CONFIGURATION!

scripts/kconfig/tests/err_recursive_dep/Kconfig

@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# depends on itself
+
+config A
+	bool "A"
+	depends on A
+
+# select itself
+
+config B
+	bool
+	select B
+
+# depends on each other
+
+config C1
+	bool "C1"
+	depends on C2
+
+config C2
+	bool "C2"
+	depends on C1
+
+# depends on and select
+
+config D1
+	bool "D1"
+	depends on D2
+	select D2
+
+config D2
+	bool
+
+# depends on and imply
+
+config E1
+	bool "E1"
+	depends on E2
+	imply E2
+
+config E2
+	bool "E2"
+
+# property
+
+config F1
+	bool "F1"
+	default F2
+
+config F2
+	bool "F2"
+	depends on F1
+
+# menu
+
+menu "menu depending on its content"
+	depends on G
+
+config G
+	bool "G"
+
+endmenu

scripts/kconfig/tests/err_recursive_dep/__init__.py

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+"""
+Detect recursive dependency error.
+
+Recursive dependency should be treated as an error.
+"""
+
+def test(conf):
+    assert conf.oldaskconfig() == 1
+    assert conf.stderr_contains('expected_stderr')

scripts/kconfig/tests/err_recursive_dep/expected_stderr

@@ -0,0 +1,38 @@
+error: recursive dependency detected!
+	symbol A depends on A
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol B is selected by B
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol C1 depends on C2
+	symbol C2 depends on C1
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol D1 depends on D2
+	symbol D2 is selected by D1
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol E1 depends on E2
+	symbol E2 is implied by E1
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol F1 default value contains F2
+	symbol F2 depends on F1
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"
+
+error: recursive dependency detected!
+	symbol G depends on G
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
+subsection "Kconfig recursive dependency limitations"