I will note that the Makefile build is not something we test. What happens if 
you drop -m from your build command, to use Ninja instead?

Jordan


> On Oct 8, 2017, at 22:36, Slava Pestov via swift-dev <swift-dev@swift.org> 
> wrote:
> 
> Hi Atul,
> 
> The master branch is tested in CI, so any build failures are likely due to 
> configuration problems on your end. While testing the swift-4.0-branch would 
> provide an interesting data point, I would not expect it to work if building 
> master fails.
> 
> Slava
> 
>> On Oct 8, 2017, at 10:35 PM, Atul Sowani via swift-dev <swift-dev@swift.org 
>> <mailto:swift-dev@swift.org>> wrote:
>> 
>> I still have no luck building swift on x86 using the master branch. Is it 
>> recommended to use the master branch at all (considering a lot of fixes 
>> would be coming in) or is it desirable to use 4.0 branch instead as a 
>> general rule?
>> 
>> Thanks,
>> Atul.
>> 
>> On Fri, Oct 6, 2017 at 7:03 PM, Atul Sowani via swift-dev 
>> <swift-dev@swift.org <mailto:swift-dev@swift.org>> wrote:
>> Thanks Alex! I used the clean/reset command and then tried rebuilding it, 
>> but got the very same error. I am using master branch, latest 
>> (top-of-the-tree) version:
>> 
>> git clone https://github.com/apple/swift.git 
>> <https://github.com/apple/swift.git>
>> ./swift/utils/update-checkout --clone
>> cd swift
>> utils/build-script -c -m -R --verbose-build
>> 
>> Hope this is correct.
>> 
>> Thanks,
>> Atul.
>> 
>> On Fri, Oct 6, 2017 at 5:51 PM, Alex Blewitt <alb...@apple.com 
>> <mailto:alb...@apple.com>> wrote:
>> 
>> 
>> > On 6 Oct 2017, at 12:42, Atul Sowani via swift-dev <swift-dev@swift.org 
>> > <mailto:swift-dev@swift.org>> wrote:
>> >
>> > Hi,
>> >
>> > Swift "master" branch is failing to build on x86 running Ubuntu 16,04 with 
>> > following error.
>> 
>> Most of the recent builds appear to be working:
>> 
>> https://ci.swift.org/view/swift-master-next/job/oss-swift-incremental-RA-linux-ubuntu-16_04-master-next/
>>  
>> <https://ci.swift.org/view/swift-master-next/job/oss-swift-incremental-RA-linux-ubuntu-16_04-master-next/>
>> 
>> > I am using following build command from inside swift-source/swift 
>> > directory:
>> > utils/build-script -c -m -R --verbose-build
>> 
>> What version of the 'swift' project do you have checked out? Have you done a 
>> clean/reset to make sure those aren't issues at the moment?
>> 
>> You can run swift/utils/update-checkout --clean --reset-to-remote --scheme 
>> master (which will get rid of any cruft if you haven't got anything you need 
>> to keep) and then re-run the build to see if that resolves the errors.
>> 
>> Alex
>> 
>> 
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>> 
>> 
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