[Bug 1696710] Re: Ubuntu 16.04.02: depmod: WARNING: <module-path> needs unknown symbol .TOC.

[Manoj Iyer]

Building Zesty kernel source in Xenial series in launchpad PPA, I am
able to reproduce this bug:

many such messages:

depmod: WARNING: /<<PKGBUILDDIR>>/debian/linux-image-4.10.0-29-generic/lib/modules/4.10.0-29-generic/kernel/zfs/splat/splat.ko needs unknown symbol .TOC.
EE: Unresolved module dependencies in base package!
debian/rules.d/2-binary-arch.mk:109: recipe for target 'install-generic' failed
make: *** [install-generic] Error 1
dpkg-buildpackage: error: fakeroot debian/rules binary-arch gave error exit status 2
--------------------------------------------------------------------------------
Build finished at 20170725-1711

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Title:
  Ubuntu 16.04.02: depmod: WARNING: <module-path> needs unknown symbol
  .TOC.

Status in The Ubuntu-power-systems project:
  New
Status in kmod package in Ubuntu:
  Fix Released
Status in kmod source package in Xenial:
  Fix Committed

Bug description:
  == Comment: #0 - Douglas Miller <dougmill at us.ibm.com> - 2017-01-24 07:59:54 ==
  ---Problem Description---
  depmod does not handle .TOC symbol on powerpc platforms
   
  Contact Information = Douglas Miller <dougmill at linux.vnet.ibm.com> 
   
  ---uname output---
  Linux p8le03 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:40:06 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = other 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Compile kernel, during modules_install target the messages appear. PPC64 modules have a .TOC symbol which is required. It may be the only symbol with a period in the name, and so tools that restrict symbols based on a pattern may neglect to include .TOC.
   
  Userspace tool common name: depmod 
   
  The userspace tool has the following bit modes: 64 

  Userspace rpm: libkmod2:ppc64el

  Userspace tool obtained from project website:  na 
   
  *Additional Instructions for Douglas Miller <dougmill at linux.vnet.ibm.com>:
  -Attach ltrace and strace of userspace application.

  == Comment: #3 - Douglas Miller <dougmill at us.ibm.com> - 2017-01-24 08:12:58 ==
  kmod package:

  # dpkg --list |grep kmod
  ii  kmod                                           22-1ubuntu4                         ppc64el      tools for managing Linux kernel modules
  ii  libkmod2:ppc64el                               22-1ubuntu4                         ppc64el      libkmod shared library

  == Comment: #7 - Douglas Miller <dougmill at us.ibm.com> - 2017-06-07 16:20:38 ==
   I was doing a build of upstream origin/master on Ubuntu 16.04.2 fresh install and still getting these messages. In the "make modules_install" output I see:

  ...
    DEPMOD  4.12.0-rc4
  depmod: WARNING: /lib/modules/4.12.0-rc4/kernel/arch/powerpc/kernel/rtas_flash.ko needs unknown symb
  ol .TOC.
  ...

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