[swift-users] Disable "indexing while building" in Xcode9 (unknown argument: `-index-store-path`)

[Anders Hasselqvist]

Hi,

I've been trying to use the swift4 snapshot toolchains with Xcode9 beta
with little success.

When building I get the error:
"
<unknown>:0: error: unknown argument: '-index-store-path'

Command
/Library/Developer/Toolchains/swift-4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a.xctoolchain/usr/bin/swiftc
failed with exit code 1
"

I believe that this because of missing "indexing while building" support in
the open source swift in the currently available snapshots. (The feature
was merged just a few days ago: https://github.com/apple/swift/pull/10726)

Is there a way to disable "indexing while building" in Xcode9?

Thanks,
Anders
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