[Nix-dev] LLVM builds on Hydra but not locally

[James Cook]

Didn't help.  I think I enabled build-use-chroot (edited
configuration.nix, did nixos-rebuild switch and double-checked that
build-use-chroot = true in /etc/nix/nix.conf), and then I got the same
error.

Thanks for pointing out the option, though; somehow I had assumed
NixOS enabled that by default... is there a reason not to?

James

On 15 December 2013 06:23, Rob Vermaas <rob.vermaas at gmail.com> wrote:
> Hi James,
>
> I am not sure if it is applicable, but one thing that is typically
> different between Hydra (hydra.nixos.org) and typical Nix/NixOS
> installations, is that we build with chroot enabled (see manual, think
> it is called build-use-chroot in nix.conf). Perhaps that is
> influencing the build due to some impurity somewhere.
>
> Cheers,
> Rob
>
> On Sun, Dec 15, 2013 at 9:43 AM, James Cook <james.cook at utoronto.ca> wrote:
>> Any experts on building LLVM?  I am seeing different results from
>> Hydra.  Maybe it's because I have an AMD CPU.  Full /proc/cpuinfo at
>> https://gist.github.com/falsifian/7970458 .
>>
>> When I try to build LLVM on the stdenv-updates branch (haven't tried
>> master), I see the following error:
>>
>> [ 48%] Built target LLVMMCJIT
>> building lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/all
>> building lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/depend
>> Scanning dependencies of target LLVMAArch64Utils
>> make[2]: *** No rule to make target
>> `lib/Target/AArch64/AArch64GenSubtargetInfo.inc', needed by
>> `lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64BaseInfo.cpp.o'.
>>  Stop.
>> make[1]: *** [lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/all]
>> Error 2
>>
>> Full build output at https://gist.github.com/falsifian/7970450 .  This
>> is at commit 2bc29e4e, but I've tried other places on stdenv-updates
>> with the same result.
>>
>> On the other hand, Hydra seems able to build this (same store path) if
>> I'm interpreting this page correctly:
>> http://hydra.nixos.org/build/7133993 .
>>
>> Am I supposed to have system set to something different if I'm on
>> 64-bit AMD compared to 64-bit Intel?
>>
>> I haven't looked further into it because I know very little about building LLVM.
>>
>> James
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>> nix-dev at lists.science.uu.nl
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>
>
>
> --
> Rob Vermaas
>
> [email] rob.vermaas at gmail.com