[llvm-dev] Incorrect / missing dependencies in llvm build?

Wed Nov 16 20:51:11 PST 2016

Mats, don’t sweat reproducing it unless it just pops up for you. I actually spent some time today implementing that idea we had for detecting these failures, and I committed it in r287207. It relies on the OS X tool sandbox-exec, but I’ll work my way through all the missing dependencies over the next couple days.

-Chris

> On Nov 16, 2016, at 5:09 PM, mats petersson <mats at planetcatfish.com> wrote:
> 
> I'm sorry, I was trying to work out something else yesterday, and the first time I thought it was just some general build error that had scrolled past on the screen above, so thought "make again will show me the error". The second time, I was just trying to get something done before going to bed (something I should have done a while ago today too!). 
> 
> I will definitely make an effort to repro this tomorrow... 
> 
> --
> Mats
> 
> On 16 November 2016 at 22:10, Chris Bieneman <beanz at apple.com <mailto:beanz at apple.com>> wrote:
> A general call here. Anyone who ever sees a compile error of a missing tablegen-generated header please email me the error.
> 
> These errors are really easy to fix as we find them, but we don’t currently have a good way to force trigger them, or to audit the dependencies.
> 
> I’ve had water cooler conversations around the office with people about building a way to detect these failures, but I haven’t yet had a chance to build it. I may try and prioritize this so that we can have something sooner rather than later.
> 
> On the less general note, this thread doesn’t seem to have a specific error listed anywhere, does anyone have one handy they can point me at?
> 
> -Chris
> 
>> On Nov 16, 2016, at 12:54 PM, Jonathan Roelofs <jonathan at codesourcery.com <mailto:jonathan at codesourcery.com>> wrote:
>> 
>> +cbieneman
>> Mr. CMake might know how to fix it ;)
>> 
>> Jon
>> 
>> On 11/16/16 1:52 PM, mats petersson wrote:
>>> Thanks, at least I know I'm not imagining or doing something really daft! ;)
>>> 
>>> My cmake skills are near 0%, so not sure I can fix, but perhaps I can at least raise a bug? ;)
>>> 
>>> --
>>> Mats
>>> 
>>> On 16 November 2016 at 20:28, Martin J. O'Riordan <martin.oriordan at movidius.com <mailto:martin.oriordan at movidius.com>> wrote:
>>> I sometimes see this with a clean build and most often it is 'Attributes.inc' that is missing.  I usually have to 'touch Attributes.td' for this.  But I don't know CMake well enough to know how to fix these issue properly.
>>> 
>>>         MartinO
>>> 
>>> -----Original Message-----
>>> From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org <mailto:llvm-dev-bounces at lists.llvm.org>] On Behalf Of Jonathan Roelofs via llvm-dev
>>> Sent: 16 November 2016 20:11
>>> To: mats petersson <mats at planetcatfish.com <mailto:mats at planetcatfish.com>>; llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>
>>> Subject: Re: [llvm-dev] Incorrect / missing dependencies in llvm build?
>>> 
>>> 
>>> 
>>> On 11/16/16 1:05 PM, mats petersson via llvm-dev wrote:
>>> > Yesterday, I took latest git version of LLVM, built a makefile using
>>> > cmake (had to update from my "old" cmake to a newer one, so picked the
>>> > latest 3.7.0), and ran the resulting makefile with `make -j 8`. This
>>> > failed with an error, but when I ran make again, it worked fine... My
>>> > guess as to the problem is that there's one or more dependency that
>>> > isn't made clear to make (or cmake), and when I run make again, it has
>>> > built the "previously missing" one.
>>> >
>>> > I didn't spend much time debugging this, I may have a go tonight, I
>>> > just wanted to raise this, in case someone else has seen this and/or
>>> > has a solution... I was able to reproduce the problem tho', as I built
>>> > llvm twice with different configurations, and it happened both times -
>>> > and rerunning make resolved it both times too.
>>> 
>>> Folks on my team have seen this. From their description of the failure, it looked to me like it was a problem with missing dependencies on TableGen-generated headers... but I didn't get enough information to be able to track down exactly which TU was missing the dep, and I haven't been able to reproduce it myself.
>>> 
>>> 
>>> Jon
>>> 
>>> >
>>> > --
>>> > Mats
>>> >
>>> >
>>> > _______________________________________________
>>> > LLVM Developers mailing list
>>> > llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
>>> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
>>> >
>>> 
>>> --
>>> Jon Roelofs
>>> jonathan at codesourcery.com <mailto:jonathan at codesourcery.com>
>>> CodeSourcery / Mentor Embedded
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
>>> 
>>> 
>> 
>> -- 
>> Jon Roelofs
>> jonathan at codesourcery.com <mailto:jonathan at codesourcery.com>
>> CodeSourcery / Mentor Embedded
> 
> 

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