Sorry, I missed this. Is it still causing problems?

Does /work/cr/src/third_party/llvm-bootstrap/./bin/clang -v work?

Could you provide the output from ldd on /work/cr/src/third_party/llvm-bootstrap/./bin/c-index-test and clang?

It's only causing problems when trying to run update.py on a new Linux (which currently nobody's trying, but people will eventually do -- scottmg tried for a bit, so I asked him to file a bug, since others will eventually have this problem). I think the problem is that c-index-test depends on system libicuuc.so.55, which in turn depends on libstdc++.so, but on a newer one than the one we bundle.

Maybe we can just stop bundling libstdc++. Or bundle a newer one.

It sounds like this is a problem with the `clang` binary after the last roll, meaning we currently can't build on Ubuntu 16.04. That's no good.

The root cause for this is probably https://bugs.llvm.org/show_bug.cgi?id=33908 ; in the meantime I'm going to remove our libstdc++ bundling since it's currently not needed. If we need it again later, we should consider statically linking libstdc++ (but that's annoying since we ship a bunch of binaries), or something.

https://chromium-review.googlesource.com/c/582976

(retitling for new, larger, scope)

Similar problems on Debian stretch, FWIW.

Issue 748210 has been merged into this issue.

For people who are seeing this: you can run `rm third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6` to work around this until the change above has made it through the cq.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d1b349921b612c35fa6c8d67443bd8155b790b5b

commit d1b349921b612c35fa6c8d67443bd8155b790b5b
Author: Nico Weber <thakis@chromium.org>
Date: Tue Jul 25 00:58:59 2017

clang: Rebuild binaries.

Two changes:

1.) Stop bundling libstdc++.so.

This was needed when the bots were still on trusty. Now that they're all
on precise, the system libstdc++ is new enough to run clang.

The motivation is that clang currently transitively depends on system
libicuuc, which depends on a newer libstdc++ than the one we bundle.
So currently, clang fails to start on Ubuntu 16+.

2.) Built libclang_rt.ios.a with arm64 code too.

TBR=hans

Bug:  723919 , 747726 
Change-Id: Ie123a2f6c80d539e4a246c5c0073d8560a66b5ba
Reviewed-on: https://chromium-review.googlesource.com/582976
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489167}
[modify] https://crrev.com/d1b349921b612c35fa6c8d67443bd8155b790b5b/base/BUILD.gn
[modify] https://crrev.com/d1b349921b612c35fa6c8d67443bd8155b790b5b/build/config/sanitizers/BUILD.gn
[modify] https://crrev.com/d1b349921b612c35fa6c8d67443bd8155b790b5b/tools/clang/scripts/package.py
[modify] https://crrev.com/d1b349921b612c35fa6c8d67443bd8155b790b5b/tools/clang/scripts/update.py

Should be better now, shout if you still see this at trunk.

Works fine again. Thanks.

Fixed for me too thanks!