On Tue, Jul 27, 2021 at 9:07 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > On Mon, Jul 26, 2021 at 10:27 PM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote: > > Masahiro Yamada <masahiroy@xxxxxxxxxx> writes: > > > On Wed, Jul 21, 2021 at 4:58 AM Arnd Bergmann <arnd@xxxxxxxxxx> wrote: > > > > Does anyone have any ideas? > > > > Something so we don't have to specify all of these variables on the make > > command line would be nice. > > Just including the main Makefile does not work. > That's why I went with the more convoluted solution in > https://lore.kernel.org/linux-kbuild/CAMuHMdXJBqrpzaSNDJgic14ESiHV6cCcb_5E-st6iniXdmm9_g@xxxxxxxxxxxxxx/ This is roughly what I use as well, but it does have the downside that it confuses the inner 'make' when you build multiple targets in parallel, e.g. make -skj30 kernel/ mm/ init/ works with the normal Makefile, but fails spectacularly with my nested GNUmakefile because it starts multiple sub-processes that each try to build the same preparation files (I did not try your version). What I had in mind was to use something like (but not exactly) -include $(O)/Makefile.cross to conditionally include another file from the top-level Makefile before doing anything else. Arnd
