missing SwiftShims when building Swift

I ran into this error a couple of times when building Swift on X86:

/home/bryanpkc/swift/swift/stdlib/public/core/ArrayBody.swift:18:8: error:
opening import file for module 'SwiftShims': No such file or directory
import SwiftShims
       ^
[487/524] Generating UnicodeExtendedGraphemeClusters.cpp from
UnicodeExtendedGraphemeClusters.cpp.gyb with ptr size = 8
ninja: build stopped: subcommand failed.

My invocation to build is (I am using clang and LLVM trunk):

./utils/build-script -c -r -t -- --reconfigure --use-gold-linker

The last time I saw this, I updated the source and re-ran a clean build,
and it actually finished; I couldn't identify what had changed. But the
problem seems to come and go randomly. Has any one seen this, and how can I
debug it?

Thanks,
Bryan

This is [SR-23] Build fails on Ubuntu 14.04.1 -> error: opening ... 'SwiftShims': No such file · Issue #42646 · apple/swift · GitHub

Dmitri

···

On Wed, Mar 2, 2016 at 1:20 PM, Bryan Chan via swift-dev <swift-dev@swift.org> wrote:

I ran into this error a couple of times when building Swift on X86:

/home/bryanpkc/swift/swift/stdlib/public/core/ArrayBody.swift:18:8: error:
opening import file for module 'SwiftShims': No such file or directory
import SwiftShims

--
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr@gmail.com>*/

Thanks a lot for the quick response! Downgrading libstdc++ to 6.0.19 on my
box seems to work around the issue and allow me to get further.

Bryan

> I ran into this error a couple of times when building Swift on X86:
>
> /home/bryanpkc/swift/swift/stdlib/public/core/ArrayBody.swift:18:8:

error:

···

Dmitri Gribenko <gribozavr@gmail.com> wrote on 2016-03-02 04:21:30 PM: > On Wed, Mar 2, 2016 at 1:20 PM, Bryan Chan via swift-dev > <swift-dev@swift.org> wrote:

> opening import file for module 'SwiftShims': No such file or directory
> import SwiftShims

This is [SR-23] Build fails on Ubuntu 14.04.1 -> error: opening ... 'SwiftShims': No such file · Issue #42646 · apple/swift · GitHub

Dmitri