Toolchains, system roots, and other binaries used by the build system

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Branches

  1. 3984d8d [go] use the given GOROOT for fuchsia builds by David Crawshaw · 2 days ago master
  2. de2d6da Roll Clang toolchain by Petr Hosek · 12 days ago
  3. 39e66a5 Roll the sysroot prebuilt by Petr Hosek · 2 weeks ago
  4. 9d0de72 Move host sysroot to host platform specific subdirectory by Petr Hosek · 2 weeks ago
  5. 5fd4bdf Roll QEMU prebuilt by Petr Hosek · 2 weeks ago

Fuchsia Build Tools

This repository contains the hashes of a number of prebuilt tools that are used to build Fuchsia-related projects. The actual tools themselves are located in Google Storage.

In most cases, the jiri tool will download the build tools automatically during its update step. To download the tools manually, run update.sh.

Uploading a tool

NOTE: These instructions are for Googlers only.

Installing gsutil

The tarballs are uploaded with the “gsutil” program. See https://cloud.google.com/storage/docs/gsutil

There's a link there to download and install the Google Cloud SDK: https://cloud.google.com/sdk/docs/

After installing the SDK you need to initialize/authenticate: https://cloud.google.com/storage/docs/gsutil_install#authenticate

One of the steps will ask you for a cloud project. Choose loas-fuchsia-team.

At this point you can use gsutil to upload/download tarballs, view cloud directory contents, and so on.

Tarballs

Tarballs must have the tool name as the top level directory. E.g.,

bash$ tar tvf qemu.tar.bz2
drwxr-xr-x ... qemu/
drwxr-xr-x ... qemu/libexec/
...

The uploaded file name is the sha1 hash of the tarball. It could also be a sha1 hash of the tarball contents, avoiding unnecessary spurious differences in uploads.

To compute the latter, one can do something like:

bash$ LC_ALL=POSIX cat $(find qemu/ -type f | sort) | shasum -a1

The sha1 hash is checked into the buildtools repo and supports adding new tarballs or rolling back to a previous one. See the *.sha1 files in buildtools/{mac,linux64}.

There are separate directories for mac and linux tarballs. E.g.,

bash$ ./bin/gsutil ls gs://fuchsia-build/fuchsia/qemu/mac
gs://fuchsia-build/fuchsia/qemu/mac/
gs://fuchsia-build/fuchsia/qemu/mac/10d77d7df5b39440148ac3aab1a401ff42337a76
...
bash$ ./bin/gsutil ls gs://fuchsia-build/fuchsia/qemu/linux64
gs://fuchsia-build/fuchsia/qemu/linux64/
gs://fuchsia-build/fuchsia/qemu/linux64/10d77d7df5b39440148ac3aab1a401ff42337a76
...