Firefox 40 ftbfs on powerpc in wily

[Michael Terry]

This ftbfs error is preventing 40 from hitting the release pocket. It's stuck in proposed right now.

https://launchpadlibrarian.net/215722137/buildlog_ubuntu-wily-powerpc.firefox_40.0.3%2Bbuild1-0ubuntu1_BUILDING.txt.gz

Seems to an error like so:

/usr/include/c++/5/bits/atomic_base.h:477: undefined reference to `__atomic_compare_exchange_8'
/usr/include/c++/5/bits/atomic_base.h:477: undefined reference to `__atomic_compare_exchange_8'
collect2: error: ld returned 1 exit status
make[6]: *** [TestAtomics] Error 1

Which would make me think a missing -latomic somewhere. But looking at the source, it wasn't clear to me how TestAtomics or other tests were getting passed their LDFLAGS.

[Chris Coulson (chrisccoulson)]

Given my other priorities (Oxide), I'm not likely to be able to spend any time on Firefox issues that don't affect x86 / x86-64 other than reviewing a merge proposal from someone who cares about PPC.

Given that Mozilla consider PPC a tier-3 platform (https://developer.mozilla.org/en/docs/Supported_build_configurations), I'd rather we just stopped pretending that Firefox is at all supported on it tbh. The build breaks with a new issue with almost every new version.

[Jamie Strandboge (jdstrand)]

I agree with Chris, though firefox on powerpc is more of a Desktop team question. I'm going to reassign to Chad Miller for now, but the desktop team may come to the same conclusion.

[Michael Terry (mterry)]

I'm fine with us not caring about powerpc. But the way things are now, it's blocking Firefox 40 from landing on x86/amd64 as well.

[Adam Conrad (adconrad)]

I'm not fine with dropping support for an arch because of a minor build failure. Let's just fix it.

[Launchpad Janitor (janitor)]

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

[Matthias Klose (doko)]

built with updated GCC 5