Hi Stephen, On Wed, Oct 3, 2018 at 12:51 PM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > > Hi Masahiro, > > I don't know if that has anything to changes in the kbuild system, but > since Tuesday, I have been getting random build errors that go away after > I remove the object directory and build again. I have no idea. Is it fine if you use kbuild tree from the last week? I added 4 kbuild patches this week, but they look irrelevant. masahiro@pug:~/ref/linux-next$ git log --oneline next-20180928..next-20181002 | grep kbuild 4712eca8 Merge remote-tracking branch 'kbuild/for-next' ae5c311 Merge remote-tracking branch 'kbuild-current/fixes' 7163c4d Merge branch 'kbuild' into for-next 7c59867 kbuild: simplify command line creation in scripts/mkmakefile 23d86e8 kbuild: do not pass $(objtree) to scripts/mkmakefile 166011a kbuild: remove user ID check in scripts/mkmakefile e4db0f7 kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile > The latest example is this: > > include/linux/kconfig.h: file not recognized: file format not recognized > make[2]: *** [scripts/Makefile.build:492: crypto/crypto_user.o] Error 1 > make[1]: *** [Makefile:1057: crypto] Error 2 > make: *** [Makefile:152: sub-make] Error 2 > Command exited with non-zero status 2 > > It is always complaining about a .h file ... > > Makefile:152 is the MAKE lien below: > > # Invoke a second make in the output directory, passing relevant variables > sub-make: > $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ > -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) > > Makefile:1057 is the MAKE line below: > > PHONY += $(vmlinux-dirs) > $(vmlinux-dirs): prepare scripts > $(Q)$(MAKE) $(build)=$@ need-builtin=1 > > scripts/Makefile.build:492 is the if_changed line below: > > $(multi-used-m): FORCE > $(call if_changed,link_multi-m) > @{ echo $(@:.o=.ko); echo $(filter-out FORCE,$^); \ > $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) > $(call multi_depend, $(multi-used-m), .o, -objs -y -m) > > Not sure what else I can tell you. > Does this happen only when building a module? Can you provide a procedure to reproduce this? -- Best Regards Masahiro Yamada