[Bug 1352836] Re: link failure when package is built with -O3 (14.10)

[Alan Modra]

Upstream bugzilla with reduced testcase at
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62033

** Bug watch added: GCC Bugzilla #62033
   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62033

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https://bugs.launchpad.net/bugs/1352836

Title:
  link failure when package is built with -O3 (14.10)

Status in “gcc-4.9” package in Ubuntu:
  Confirmed

Bug description:
  this can be reproduced in a 14.10 chroot, with -proposed enabled.

  link failure when the okteta package is built with -O3 (14.10), it
  succeeds when built with -O2.

  https://launchpad.net/ubuntu/+source/okteta/4:4.13.97-0ubuntu1
  search for "error:" in the build log. There is no error message from the linker.

  looking at the history of build failures this seems to be seen first
  with GCC 4.9 as the default GCC..

  workaround with -O2:
  https://launchpad.net/ubuntu/+source/okteta/4:4.13.97-0ubuntu2

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