tree a6d821beeda6a639756991d0c4a3f759d5bc2a07
parent 7bd559145a1e8448156b5c4974e8d7fe6acecb83
author Derek Schuff <dschuff@chromium.org> 1610676131 -0800
committer Derek Schuff <dschuff@chromium.org> 1610676131 -0800

Use LTO when building tagged revisions of emscripten

Adds a third mode for building with LTO: aside from enabled or disabled,
check whether the current revision of emscripten is a tagged revision,
and use LTO if so.

Also clobber working dir before and after LTO builds