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Commit 9ee4e336 authored by Sam Ravnborg's avatar Sam Ravnborg
Browse files

kbuild: external modules shall not check config consistency 



external modules needs include/linux/autoconf.h and include/config/auto.conf
but skip the integrity test of these. Even with a newer Kconfig file we
shall just proceed since external modules simply uses the kernel source and
shall not attempt to modify it.
Error out if a config fiel is missing since they are mandatory.

Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 58a2f7d8

Makefile

+18 −6
Original line number Diff line number Diff line
@@ -436,12 +436,13 @@ core-y := usr/ 
endif # KBUILD_EXTMOD



ifeq ($(dot-config),1)

# In this section, we need .config

# Read in config

-include include/config/auto.conf



ifeq ($(KBUILD_EXTMOD),)

# Read in dependencies to all Kconfig* files, make sure to run

# oldconfig if changes are detected.

-include include/config/auto.conf.cmd

-include include/config/auto.conf



# To avoid any implicit rule to kick in, define an empty command

$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
@@ -451,16 +452,27 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 
# if auto.conf.cmd is missing then we are probably in a cleaned tree so

# we execute the config step to be sure to catch updated Kconfig files

include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd

ifeq ($(KBUILD_EXTMOD),)

	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig

else

	$(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it)

endif

# external modules needs include/linux/autoconf.h and include/config/auto.conf

# but do not care if they are up-to-date. Use auto.conf to trigger the test

PHONY += include/config/auto.conf



include/config/auto.conf:

	$(Q)test -e include/linux/autoconf.h -a -e $@ || (		\

	echo;								\

	echo "  ERROR: Kernel configuration is invalid.";		\

	echo "         include/linux/autoconf.h or $@ are missing.";	\

	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\

	echo;								\

	/bin/false)



endif # KBUILD_EXTMOD



else

# Dummy target needed, because used as prerequisite

include/config/auto.conf: ;

endif

endif # $(dot-config)



# The all: target is the default when no target is given on the

# command line.