Commit 752625cf authored by Sam Ravnborg's avatar Sam Ravnborg

kbuild: always run 'make silentoldconfig' when tree is cleaned

If the file .kconfig.d is missing then make sure to run
'make silentoldconfig', since we have no way to detect if
a Kconfig file has been updated.

-kconfig.d is created by kconfig and is removed as part
of 'make clean' so the situation is likely to occur in reality.

Jan Beulich <> reported this bug.
Signed-off-by: default avatarSam Ravnborg <>
parent 54e08a23
......@@ -477,18 +477,20 @@ ifeq ($(dot-config),1)
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
-include .config.cmd
-include .kconfig.d
include .config
# If .config needs to be updated, it will be done via the dependency
# that autoconf has on .config.
# To avoid any implicit rule to kick in, define an empty command
.config: ;
.config .kconfig.d: ;
# If .config is newer than include/linux/autoconf.h, someone tinkered
# with it and forgot to run make oldconfig
include/linux/autoconf.h: .config
# with it and forgot to run make oldconfig.
# If kconfig.d is missing then we are probarly in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/linux/autoconf.h: .kconfig.d .config
$(Q)mkdir -p include/linux
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
......@@ -33,7 +33,7 @@ int file_write_dep(const char *name)
FILE *out;
if (!name)
name = ".config.cmd";
name = ".kconfig.d";
out = fopen("..config.tmp", "w");
if (!out)
return 1;
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