tree 835348fedc3cf4e8da0f9348c73fb4db3b4135d0
parent e31bac9fc1b0205c952b03b4d48387513679b0be
author hlopko <hlopko@google.com> 1555509465 -0700
committer Copybara-Service <copybara-worker@google.com> 1555509599 -0700

Make thinlto action command lines standalone

This cl introduces an incompatible flag `--incompatible_make_thinlto_command_lines_standalone`, which when flipped will change Bazel's handling of thinlto:

1) lto-backend action_config now has to be defined in the CcToolchainConfigInfo
2) lto-indexing action is split into:
    * lto-index-for-executable
    * lto-index-for-dynamic-library
    * lto-index-for-nodeps-dynamic-library
3) all these need an action_config too
4) lto-indexing action is completely ignored
5) lto indexing command line is now defined independently of c++-link-executable, c++-link-dynamic-library, and c++-link-nodeps-dynamic-library, flags are no longer reused.

https://github.com/bazelbuild/bazel/issues/6791

RELNOTES: Incompatible flag `--incompatible_make_thinlto_command_lines_standalone` has been added. See https://github.com/bazelbuild/bazel/issues/6791 for details.
PiperOrigin-RevId: 243988905