Like HOST_ARCH_*, HOST_OS_* describes the OS the VM is running on, which may be different from the OS the VM is generating code for during AOT compilation.
Currently we conflate the two when emitting AOT as assembly, and we get away with it because Flutter only uses assembly for targeting iOS and one can only target iOS from a Mac, but we expect to use assembly for Android as well so native tools can unwind Dart frames.
R=zra@google.com
Review-Url: https://codereview.chromium.org/2750843003 .
This CL adds targets to the GN build that build the standalone Dart VM
without the observatory, and with dart:io enabled but with most of the
functionality stubbed out as UNIMPLEMENTED(). It also adds a simple
eventhandler for Fuchsia for implementing Timers.
R=asiva@google.com, johnmccutchan@google.com
Review URL: https://codereview.chromium.org/2168193002 .
George Kulakowski