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

Wed Nov 16 14:10:53 PST 2016

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> 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
>> _______________________________________________
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>> 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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