[LLVMdev] Debugging atom builds?

[Renato Golin]

On 3 April 2013 14:59, Timur Iskhodzhanov <timurrrr at google.com> wrote:

> I'd usually expect tests to work exactly the same way on all platforms.
> If there are things that must be handled differently on different
> platforms, I'd expect those to have a separate test for each platform
> with explicit flags for each of these platforms.
>

You're absolutely right, but the tests don't necessarily follow the
accepted model.

The main causes of build failure, to my experience are, in order of
probability:

* Bad tests, testing for order in random output or machine-specific
behaviour (lib version, etc)
* Target-specific behaviour on target agnostic tests (as you say, it can be
easily fixed)
* autoconf vs. CMake issues
* bug in LLVM/Clang

What I do is to contact the responsible for the bot and ask him/her to give
me more info on the failure, so I can start the debug process, and go back
and forth until the bug is fixed. The owner can be queried on the bot's
page:

http://lab.llvm.org:8011/buildslaves/atom1-buildbot

cheers,
--renato
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