Messages in this thread | | | From | Arnd Bergmann <> | Date | Tue, 27 Jul 2021 09:49:09 +0200 | Subject | Re: [PATCH v2 2/2] Makefile: infer CROSS_COMPILE from SRCARCH for LLVM=1 LLVM_IAS=1 |
| |
On Tue, Jul 27, 2021 at 9:07 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Mon, Jul 26, 2021 at 10:27 PM Eric W. Biederman <ebiederm@xmission.com> wrote: > > Masahiro Yamada <masahiroy@kernel.org> writes: > > > On Wed, Jul 21, 2021 at 4:58 AM Arnd Bergmann <arnd@kernel.org> 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@mail.gmail.com/
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
| |