On Thu, May 02, 2013 at 04:44:03PM +0200, Ian Kumlien wrote: > Hi, > > A dependency on bc was added at some point during the 3.9 development. > > My machines runs a git forest which contains both stable and Torvalds > mainline. So any kernel version is only a: > git fetch --all && git checkout <tag> away > > When switching from v3.8.5 to v3.9-rc7 i ran in to a odd thing. > > It seemed to build fine, make install and modules_install was all fine > as well but rebooting revealed that 3.8.5 had been installed again > instead. > > Doing make clean and rebuilding revealed that I was missing bc ;) > > I have tried to find exactly where it's run since then, i have found the > cmd_bc section but not found what triggers it... Due to lack of time and > energy, I hearby report this bug! > > This is about as far as i got: > kernel/Makefile:135:quiet_cmd_bc = BC $@ > kernel/Makefile:136: cmd_bc = bc -q $(filter-out FORCE,$^) > $@ Could you try this patch. Untested but I think it required to catch this bug. diff --git a/kernel/Makefile b/kernel/Makefile index d1574d4..18a9083 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -134,7 +134,7 @@ $(obj)/hz.bc: $(objtree)/include/config/hz.h FORCE $(call if_changed,hzfile) quiet_cmd_bc = BC $@ - cmd_bc = bc -q $(filter-out FORCE,$^) > $@ + cmd_bc = bc -q $(filter-out FORCE,$^) > $@ || (rm -f $@; false) targets += timeconst.h $(obj)/timeconst.h: $(obj)/hz.bc $(src)/timeconst.bc FORCE > > Is there any detaled information and or instructions on kbuild btw? There is some docs in Documentation/kbuild/* - but I dunno if this is what you are after. Sam -- 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
