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kbuild: fix interaction of CONFIG_IKCONFIG and KCONFIG_CONFIG 

If you try to build a kernel with KCONFIG_CONFIG set (to a value
not equal to .config) and that config sets CONFIG_IKCONFIG then the
build will fail with:

make[1]: *** No rule to make target `.config', needed by \
`kernel/config_data.gz'.  Stop.

because the kernel/Makefile contains a direct reference to .config.

This issue has been present since the introduction of KCONFIG_CONFIG
in 14cdd3c402.

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
CC: Roman Zippel <zippel@linux-m68k.org>
CC: Michal Marek <mmarek@suse.cz>
Reviewed-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Ben Gardiner 2010-12-14 11:39:44 -05:00 committed by Michal Marek
parent ba9effa2ec
commit 41263fc671
2 changed files with 2 additions and 1 deletions
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1
Makefile
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@ -224,6 +224,7 @@ ifeq ($(ARCH),m68knommu)
endif
KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \

2
kernel/Makefile
View File

@ -121,7 +121,7 @@ $(obj)/configs.o: $(obj)/config_data.h
# config_data.h contains the same information as ikconfig.h but gzipped.
# Info from config_data can be extracted from /proc/config*
targets += config_data.gz
$(obj)/config_data.gz: .config FORCE
$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
$(call if_changed,gzip)
quiet_cmd_ikconfiggz = IKCFG $@