Invoke correct CMake when building tsan libdispatch

[edymtt]

This should address a build failure on TSAN - libdispatch Linux bots

Addresses rdar://88339546

[edymtt]

preset=buildbot_incremental_linux,tsan-libdispatch-test
@swift-ci Please test with preset Linux Platform

[edymtt]

@swift-ci please python lint

[edymtt]

preset=buildbot_incremental_linux,tsan-libdispatch-test
@swift-ci Please test with preset Linux Platform

[finagolfin]

Btw, the CI no longer runs the libdispatch or tsan tests because of a pull six months ago, reported in SR-11568.

[edymtt]

Thanks for the pointers, I was not fully aware for the context.

For now I will focus on the immediate failure, so to be in a position in which we can tackle the deeper issue.

[edymtt]

@swift-ci please python lint

[edymtt]

preset=buildbot_incremental_linux,tsan-libdispatch-test
@swift-ci Please test with preset Linux Platform

[edymtt]

@swift-ci Please smoke test and merge

[yln]

Btw, the CI no longer runs the libdispatch or tsan tests because of a pull six months ago, reported in SR-11568.

I've confirmed that the config is up and running again:
https://ci.swift.org/view/Dashboard/job/oss-swift-tsan-libdispatch-linux-ubuntu-18_04/

Note that we are only running the intersection of TSan/compiler-rt + Linux + libdispatch (no Swift) tests. This config is meant to protect agains issues that would only show with the version of libdispatch used on Linux (compiled from source), but not with the system-provided one (Apple platforms). We have end-to-end "TSan for Swift" tests that run as part of the the normal Swift regression suite (including Linux).

Testing Time: 3.25s
  Excluded: 398
  Passed  :  37

So since there is no Swift testing, we can ignore the few build-script-impl at the bottom that do nothing.

[finagolfin]

Just to be clear, I'm talking about the normal linux CI that runs 15k tests from the compiler validation suite on every pull, eg all tsan tests are now disabled for a recent CI run because they depend on libdispatch.

I was unaware of this separate swift-tsan-libdispatch-linux-ubuntu-18_04 CI bot that @yln now points out, that apparently runs 30-40 tests a couple times per day? If it's been decided that's enough and there's no need to run these libdispatch and tsan tests for every pull, I'll close that bug report I reopened.

[yln]

Thanks for clarifying this; I was confused. Both should be running!
So basically we are not running any tests with REQUIRES: libdispatch on Linux CI; that's not just TSan tests and should be fixed.
@edymtt: can you help with repairing this again?