please merge llvm-toolchain-3.8 from Debian

[Gianfranco Costamagna]

debdiff attached and build ongoing @ ppa:costamagnagianfranco/locutusofborg-ppa

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ariel Faigon (ariel.faigon)]

clang in 15.04 and 16.04 LTS is pretty unusable without this patch.

Linking against precompiled (with the gcc toolchain) system libraries fails.

There are also multiple affected users in this closely related bug:

https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-3.8/+bug/1488254

[Gianfranco Costamagna (costamagnagianfranco)]

Subscribing Graham :)

[Graham Inggs (ginggs)]

@LocutusOfBorg: in your debdiff, what is debian/changelog.save? Can I remove that?
Also urgency=low for the latest changelog entry.

[Gianfranco Costamagna (costamagnagianfranco)]

Hi, changelog.save is something that Sylvestre forgot probably when uploading
https://sources.debian.net/src/llvm-toolchain-3.8/1:3.8.1-4/debian/
you can see Debian has it

urgency=low... who cares? I don't think Ubuntu is caring about it ;)
feel free to change

[Graham Inggs (ginggs)]

Thanks, uploaded! I think this needs to go through NEW because of llvm-3.8-tools. Please close this bug when it has migrated.

[Gianfranco Costamagna (costamagnagianfranco)]

it will be automatically closed because I put this bug in changelog!

thanks a lot!

[Launchpad Janitor (janitor)]

This bug was fixed in the package llvm-toolchain-3.8 - 1:3.8.1-4ubuntu1

---------------
llvm-toolchain-3.8 (1:3.8.1-4ubuntu1) yakkety; urgency=low

  * Merge from Debian unstable (LP: #1605291). Remaining changes:
    - Add support for gcc's attribute abi_tag (needed for compatibility with
      GCC 5's libstdc++); taken from the trunk.
    - Disable lldb on s390x.
    - Remove the build tree before calling dh_strip; at least the amd64 buildd
      runs out of diskspace at this step.
    - rules: Allow LLVM tests to fail on i386, we know dropping AVX512 breaks
      them.
    - drop-avx512-from-skylake.diff: Don't enable AVX512 on Skylake, as it's
      a server cpu feature and breaks llvmpipe on workstations.

llvm-toolchain-3.8 (1:3.8.1-4) unstable; urgency=medium

  * Fix the FTBFS under mips/mipsel? (enable the link against atomic)
    (Closes: #820537)
  * Bring back llvm-3.8-tools to life
  * ship clang-tblgen & yaml-bench as part of the libclang-common-X.Y-dev
    package

 -- Gianfranco Costamagna <email address hidden> Thu, 21 Jul 2016 16:59:53 +0200

[Ariel Faigon (ariel.faigon)]

Confirming that this upgrade fixes the problem for me.
clang++ now links successfully vs. system boost libs.
Thanks to all involved!