On Thu, May 02, 2013 at 09:12:32AM -0700, H. Peter Anvin wrote: > On 05/02/2013 07:44 AM, 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. > > Are you *sure* that the build didn't stop and you just didn't notice it? > That is what the above sounds like. Keep in mind that in a parallel > build there can be quite a few lines of output after the *** failure line... Damn it, i didn't see it in the 30+ line window, but yes there is a error message. Must have been more tired than i thought... > > 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 $(filter-out FORCE,$^) > $@ > > > > Is there any detaled information and or instructions on kbuild btw? > > The disconcerting thing here, of course, is if the build would have > looked like it completed without the file actually being generated. It > should have failed either to generate the file, or it should have > produced an empty header which would have caused a failure further down > the line... Imho it should have had bc as a dependency and failed to run that step. Ie instead of "/bin/sh: bc: command not found" Do we know which tools we need? could we add them as "make dependencies"? > -hpa > -- 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
