Kuba (Brecka) Mracek c89eca6c34 Enforce consistent usage of -experimental-hermetic-seat-at-link flag (#39986) ...

We've recently added the -experimental-hermetic-seal-at-link compiler flag,
which turns on aggressive dead-stripping optimizations and assumes that library
code can be optimized against client code because all users of the library
code/types are present at link/LTO time. This means that any module that's
built with -experimental-hermetic-seal-at-link requires all clients of this
module to also use -experimental-hermetic-seal-at-link. This PR enforces that
by storing a bit in the serialized module, and checking the bit when importing
modules.

2021-11-30 10:44:58 -08:00

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