Hi Alan,

  Have you seen this bug report:

https://sourceware.org/bugzilla/show_bug.cgi?id=19421

            Summary: Missing weak symbols in kernel modules on ppc64el

Quite a few symbols in kernel modules on ppc64el are dropped after upgrading to
binutils 2.25.  This in turn completely breaks module loading on ppc64el
systems, per this Debian bug report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808246

It seems that the cause of this was the patch for PR 4317:

  https://sourceware.org/bugzilla/show_bug.cgi?id=4317

Perhaps we need to allow some targets to require that undefined locals are preserved ?

Cheers
  Nick

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