commit e13835e836cc8344a8814c1f90424fecf9999fe6
author brettw <brettw@chromium.org> Wed Sep 16 15:31:33 2015 -0700
committer Commit bot <commit-bot@chromium.org> Wed Sep 16 22:32:03 2015 +0000
tree 362cdb9c812381dc3ae904f5024e0093cf366df7
parent d09e75affdbe9aa675371869316436861ad79ce3

Allow GN configs to have sub-configs.

Some of the configs are getting unwieldy (the "compiler" one) and some are used to just forward to other variants like default_symbols and default_optimization.

This adds the ability for a config to have configs to add flags by reference. This allows large configs to be split apart into more logical units, and allows forwarding configs like default_optimization to be written in the obvious way.

An example of what this enables is https://codereview.chromium.org/1341373002/

Review URL: https://codereview.chromium.org/1342183003

Cr-Original-Commit-Position: refs/heads/master@{#349258}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: bd14442c3ff59815f01abea3a32db6c017f895dd