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(#164613)
Follow-up from #162652
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Co-authored-by: Michael Klemm <michael.klemm@amd.com>
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On Windows, for a reason I don't fully understand boolean bits get extra
padding (even when asking for packed structures) in the structures that
messes the offsets between the compiler and the runtime.
Also, "weak" works differently on Windows than Linux (i.e., the "local"
routine has preference) which causes it to crash as we don't really have
an alternate implementation of __kmpc_omp_wait_deps. Given this, it
doesn't make sense to mark it as "weak" for Linux either.
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This implements two pieces to restore the interop functionality (that I
broke) when the 6.0 interfaces were added:
* A set of wrappers that support the old interfaces on top of the new
ones
* The same level of interop support for the CUDA amd AMD plugins
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The following patch introduces a new interop interface implementation
with the following characteristics:
* It supports the new 6.0 prefer_type specification
* It supports both explicit objects (from interop constructs) and
implicit objects (from variant calls).
* Implements a per-thread reuse mechanism for implicit objects to reduce
overheads.
* It provides a plugin interface that allows selecting the supported
interop types, and managing all the backend related interop operations
(init, sync, ...).
* It enables cooperation with the OpenMP runtime to allow progress on
OpenMP synchronizations.
* It cleanups some vendor/fr_id mismatchs from the current query
routines.
* It supports extension to define interop callbacks for library cleanup.
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Summary:
The name `src` is confusing when combined with the plugins and the newly
added `liboffload`.
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