Hey, On Fri, Jul 20, 2018 at 04:46:32PM +0900, Masahiro Yamada wrote: > When you build targets that require the kernel configuration, dot-config > is set to 1, then the top-level Makefile includes auto.conf. However, > Make considers its inclusion is optional because the '-include' directive > is used here. > > If a necessary configuration file is missing for the external module > building, the following error message is displayed: > > ERROR: Kernel configuration is invalid. > include/generated/autoconf.h or include/config/auto.conf are missing. > Run 'make oldconfig && make prepare' on kernel src to fix it. > > However, Make still continues building; /bin/false let the creation of > 'include/config/auto.config' fail, but Make can ignore the error since > it is included by the '-include' directive. > > I guess the reason of using '-include' directive was to suppress > the warning when you build the kernel from a pristine source tree: > > Makefile:605: include/config/auto.conf: No such file or directory > > The previous commit made sure include/config/auto.conf exists after > the 'make *config' stage. Now, we can use the 'include' directive > without showing the warning. > > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > --- > > Changes in v4: None > > Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) This complains here: [boris@zn: ~/kernel/linux> git clean -dqfx [boris@zn: ~/kernel/linux> cp ../configs/config-4.19-rc1 .config '../configs/config-4.19-rc1' -> '.config' [boris@zn: ~/kernel/linux> make Makefile:605: include/config/auto.conf: No such file or directory I guess because I'm skipping the "make oldconfig" step but that should not be necessary since it should do oldconfig automatically before building... It still works - it is just the warning that is new. Thx. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.