On Thu, Mar 03, 2016 at 05:36:30PM +0900, Masahiro Yamada wrote: > Under certain conditions, Kbuild shows "... is up to date" where > if_changed or friends are used. > > For example, the incremental build of ARM64 Linux shows this message > when the kernel image has not been updated. > > $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- > CHK include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CHK include/generated/bounds.h > CHK include/generated/timeconst.h > CHK include/generated/asm-offsets.h > CALL scripts/checksyscalls.sh > CHK include/generated/compile.h > CHK kernel/config_data.h > make[1]: `arch/arm64/boot/Image.gz' is up to date. > Building modules, stage 2. > MODPOST 0 modules > > The following is the build rule in arch/arm64/boot/Makefile: > > $(obj)/Image.gz: $(obj)/Image FORCE > $(call if_changed,gzip) > > If the Image.gz is newer than the Image and the command line has not > changed (i.e., $(any-prereq) and $(arg-check) are both empty), the > build rule $(call if_changed,gzip) is evaluated to be empty, then > GNU Make reports the target is up to date. In order to make GNU Make > quiet, we need to give it something to do, for example, "@:". This > should be fixed in the Kbuild core part rather than in each Makefile. > > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> Thanks, applied to kbuild.git#kbuild. Michal -- 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
