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: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Makefile b/Makefile
index 110db85..e71fefd 100644
--- a/Makefile
+++ b/Makefile
@@ -436,12 +436,13 @@
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 @@
# 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.
