Messages in this thread |  | | Subject | Re: VirtualBox module build breakage since commit 39808e451fdf | From | Larry Finger <> | Date | Tue, 17 Dec 2019 09:19:51 -0600 |
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On 12/15/19 11:11 PM, Masahiro Yamada wrote: > Hi. > > On Mon, Dec 16, 2019 at 11:48 AM Larry Finger <Larry.Finger@lwfinger.net> wrote: >> >> Hi, >> >> Since commit 39808e451fdf ("kbuild: do not read >> $(KBUILD_EXTMOD)/Module.symvers"), some of the modules for VirtualBox have >> failed to build. There are at least 3 such modules, namely vboxdrv, vboxnetflt, >> and vboxnetadp. > > As the section 6.3 of Documentation/kbuild/modules.rst says, > the best practice is to put the related modules into the same source > tree, and then do like this: > > obj-m := vboxdrv/ vboxnetfit/ vboxnetadp/ > > > > If you want to maintain the three separately, > as 39808e451fdf mentions, you can useKBUILD_EXTRA_SYMBOLS. > KBUILD_EXTRA_SYMBOLS was added more than a decade. > So, you should be able to use it for your modules. > > I think it is a cleaner solution than > copying around Module.symvers in your build tree.
Masahiro,
Thank you for your prompt reply. Once I got it right, the KBUILD_EXTRA_SYMBOLS method works. The debugging was slow due to the problem area happening near the end of a 45-minute build, but I now have a solution that works for all kernels.
Thanks again,
Larry
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