[chromium-dev] Origin of the LLVM toolchain binaries under third_party/llvm-build

[Simon Que]

Hi all,

Where do the LLVM binaries in third_party/llvm-build come from? Are they
built locally or downloaded during the fetch of the Chromium checkout?

If they are downloaded, is it a source from which they can be downloaded
publicly (e.g. using wget)?

Simon

[Takuto Ikuta]

Clang binaries come from
http://commondatastorage.googleapis.com/chromium-browser-clang/index.html

See
https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md
to know how clang for chrome is updated.

Post by Simon Que
Hi all,
Where do the LLVM binaries in third_party/llvm-build come from? Are they
built locally or downloaded during the fetch of the Chromium checkout?
If they are downloaded, is it a source from which they can be downloaded
publicly (e.g. using wget)?
Simon
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[Hans Wennborg]

To answer the "can they be downloaded publicly" question: yes
absolutely. You can look at
https://cs.chromium.org/chromium/src/tools/clang/scripts/update.py to
see where they're coming from.

For example, the version we currently use on Linux can be downloaded
from http://commondatastorage.googleapis.com/chromium-browser-clang/Linux_x64/clang-346388-1.tgz

Some projects even use our update.py script to download the binaries
(e.g. https://releases.llvm.org/5.0.0/docs/LibFuzzer.html#versions).
It's not actively supported, but it seems to work.

Thanks,
Hans

Post by Takuto Ikuta
Clang binaries come from
http://commondatastorage.googleapis.com/chromium-browser-clang/index.html
See
https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md
to know how clang for chrome is updated.

Post by Simon Que
Hi all,
Where do the LLVM binaries in third_party/llvm-build come from? Are they
built locally or downloaded during the fetch of the Chromium checkout?
If they are downloaded, is it a source from which they can be downloaded
publicly (e.g. using wget)?
Simon
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