commit | b0573ef0a03ea08e579c5804f08f4f5fe57a1a55 | [log] [tgz] |
---|---|---|
author | Austin Eng <enga@chromium.org> | Tue Jan 07 01:55:49 2020 |
committer | Commit Bot <commit-bot@chromium.org> | Tue Jan 07 01:55:49 2020 |
tree | 3adb88f6e3c54f375aec95b1684f5fe137cd46af | |
parent | 042a0a2c04b45f540b7b46e81a430db42a9da429 [diff] |
Define dawn_swiftshader_dir Set dawn_swiftshader_dir so Dawn can be built using swiftshader in a Chromium checkout. Note: This does not affect Dawn unless dawn_use_swiftshader=true Bug: dawn:283, dawn:295 Change-Id: I84ff58a8598b3f34e78a9fa5376f7616f48d22a6 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1986261 Commit-Queue: Austin Eng <enga@chromium.org> Reviewed-by: John Budorick <jbudorick@chromium.org> Cr-Original-Commit-Position: refs/heads/master@{#728748} Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src Cr-Mirrored-Commit: fdc7253d034c1b99ea842260b77524ee828db8d0
This directory is used to allow different products to customize settings for repos that are DEPS'ed in or shared.
For example: V8 could be built on its own (in a “standalone” configuration), and it could be built as part of Chromium. V8 might define a top-level target, //v8:d8 (a simple executable), that should only be built in the standalone configuration. To figure out whether or not it should be in a standalone configuration, v8 can create a file, build_overrides/v8.gni, that contains a variable, build_standalone_d8 = true
. and import it (as import(“//build_overrides/v8.gni”) from its top-level BUILD.gn file.
Chromium, on the other hand, might not need to build d8, and so it would create its own build_overrides/v8.gni file, and in it set build_standalone_d8 = false
.
The two files should define the same set of variables, but the values can vary as appropriate to the needs of the two different builds.
The build.gni file provides a way for projects to override defaults for variables used in //build itself (which we want to be shareable between projects).
TODO(crbug.com/588513): Ideally //build_overrides and, in particular, //build_overrides/build.gni should go away completely in favor of some mechanism that can re-use other required files like //.gn, so that we don't have to keep requiring projects to create a bunch of different files to use GN.