Hi, I'm having some problems with Kconfig - the dependency resolver seems to be getting things wrong. I have an option: config SYSTEM_TRUSTED_KEYRING bool "Provide system-wide ring of trusted keys" depends on KEYS depends on ASYMMETRIC_KEY_TYPE which, as can be seen, depends on: menuconfig ASYMMETRIC_KEY_TYPE tristate "Asymmetric (public-key cryptographic) key type" depends on KEYS But I can set CONFIG_SYSTEM_TRUSTED_KEYRING=y and CONFIG_ASYMMETRIC_KEY_TYPE=m and the Kconfig processor is quite happy - but, of course, the kernel doesn't link. Yes, I could set ASYMMETRIC_KEY_TYPE to be a bool, but if SYSTEM_TRUSTED_KEYRING is not set, there's no reason it couldn't be a module. If I change the first option to: config SYSTEM_TRUSTED_KEYRING bool "Provide system-wide ring of trusted keys" select KEYS select ASYMMETRIC_KEY_TYPE then it complains that there's a dependency loop. scripts/kconfig/conf --silentoldconfig Kconfig crypto/Kconfig:15:error: recursive dependency detected! For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" crypto/Kconfig:15: symbol CRYPTO is selected by TRUSTED_KEYS For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" security/keys/Kconfig:51: symbol TRUSTED_KEYS depends on KEYS For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" security/keys/Kconfig:5: symbol KEYS is selected by SYSTEM_TRUSTED_KEYRING For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" certs/Kconfig:17: symbol SYSTEM_TRUSTED_KEYRING is selected by KEXEC_BZIMAGE_VERIFY_SIG For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" arch/x86/Kconfig:1815: symbol KEXEC_BZIMAGE_VERIFY_SIG depends on KEXEC_VERIFY_SIG For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" arch/x86/Kconfig:1804: symbol KEXEC_VERIFY_SIG depends on KEXEC_FILE For a resolution refer to Documentation/kbuild/kconfig-language.txt subsection "Kconfig recursive dependency limitations" arch/x86/Kconfig:1791: symbol KEXEC_FILE depends on CRYPTO warning: (EXT4_ENCRYPTION && F2FS_FS_ENCRYPTION && EVM) selects ENCRYPTED_KEYS which has unmet direct dependencies (KEYS) warning: (MAC802154 && EXT4_ENCRYPTION && F2FS_FS_ENCRYPTION) selects CRYPTO_CTR which has unmet direct dependencies (CRYPTO) warning: (MODULE_SIG_SHA224 && MODULE_SIG_SHA256 && BT && LUSTRE_FS && EXT4_ENCRYPTION && F2FS_FS_ENCRYPTION && CIFS && ENCRYPTED_KEYS) selects CRYPTO_SHA256 which has unmet direct dependencies (CRYPTO) If there's a dependency loop with select here, then there must be a dependency loop with depends on here too, since A selects B is a dependency of A on B, just as is A depends on B. Any thoughts on how to resolve this? David -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
