On Thu, Aug 15, 2013 at 8:37 PM, Sergei Trofimovich <slyfox@xxxxxxxxxx> wrote: > diff --git a/Makefile b/Makefile > index 6e48848..53f4776 100644 > --- a/Makefile > +++ b/Makefile > @@ -374,6 +374,11 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ > -Werror-implicit-function-declaration \ > -Wno-format-security \ > -fno-delete-null-pointer-checks > + > +# not universally available, but nice to have ones > +KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) \ > + $(call cc-option,-Werror=strict-prototypes) > + This should be _below_ the line include $(srctree)/arch/$(SRCARCH)/Makefile , together with the other users of cc-option, else it detects the features of the host compiler instead of the cross-compiler when cross-compiling: cc1: error: unrecognized command line option "-Werror=implicit-int" cc1: error: unrecognized command line option "-Werror=strict-prototypes" See also commit a1f42beb8e287482d1a802731d4fb7e2bdc2c703 ("Makefile: fix up CROSS_COMPILE and READABLE_ASM interaction."). Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html