On Fri, Jun 12, 2020 at 3:59 PM <oceanlant...@gmail.com> wrote:
> Hi Tom,
> One question is there a location for the source that built the toolchain in 
> clangmingw.tar.xz ?

Yup, it's in mozilla-central.

For -central:
https://searchfox.org/mozilla-central/source/taskcluster/scripts/misc/build-clang-mingw.sh
calls
https://searchfox.org/mozilla-central/source/build/build-clang/build-clang.py
with
https://searchfox.org/mozilla-central/source/build/build-clang/clang-9-mingw.json
(note this will change when we upgrade to clang-10 soonish)

The task defining this is
https://searchfox.org/mozilla-central/rev/0e09b9191c02097034e46b193930f91c45b7885d/taskcluster/ci/toolchain/clang.yml#74-96
(permalink to a specific revision to keep the line numbers happy)

In the fetch section you can see the names of the sources we fetch,
which are mapped to specific versions
https://searchfox.org/mozilla-central/rev/0e09b9191c02097034e46b193930f91c45b7885d/taskcluster/ci/fetch/toolchains.yml#363,377,412
(again, permalink)

The whole process is a bit tricky to follow.

-tom
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