Paulius Velesko 264ac2d3af [HIP][MacOS] Mach-O support and Darwin toolchain fixes (#183991) ...

This PR adds support for HIP on macOS: Mach-O section naming, Darwin
host toolchain initialization guards, and HIPSPV behavior when Darwin is
the host.

This has been verified using chipStar on MacOS via the PoCL OpenCL
implementation.

## Uninitialized target workaround
Darwin’s toolchain is only initialized when its own TranslateArgs runs.
For HIP/CUDA device jobs, Darwin is used as the HostTC and never gets
its args translated, so its target stays uninitialized. The new checks
avoid asserting on that uninitialized state. A better long-term fix is
to initialize Darwin earlier (see the FIXME in Driver.cpp
BuildJobsForAction).

- [ ] Initialize Darwin toolchain during construction instead of lazily
in TranslateArgs. See Driver.cpp BuildJobsForAction FIXME.

- [x] In Darwin’s addClangTargetOptions, skip host-stdlib flags when
DeviceOffloadKind != OFK_None so HIPSPV can safely delegate to the host.

2026-04-28 12:43:59 -05:00

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