Fix AArch64 NCCL EP linking with BOLT enabled

[aybchan]

Description

BOLT NCCL EP submodule build fails on arm because GNU ld.bfd rejects --no-fix-cortex-a53-843419.

Pass the original -mno-fix-cortex-a53-843419 option to the host compiler driver through NVCC’s -Xcompiler, preserving the intended behavior of disabling the Cortex-A53 workaround.

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Please list the changes introduced in this PR:

• Fix NCCL EP linking on AArch64 by passing -mno-fix-cortex-a53-843419 through NVCC’s -Xcompiler instead of emitting an unsupported linker option.
• Fix Transformer Engine’s CMake link options to pass the same flag directly to the compiler driver, removing the incorrect LINKER: prefix.

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Adjusts compiler flags for ARM64 NCCL linking.

The PR appears safe to merge based on the reviewed changes.

Summary

The PR changes how the AArch64 Cortex-A53 workaround flag reaches the compiler driver, avoiding an unsupported direct linker option.

• The NCCL EP build now passes the flag through NVCC’s -Xcompiler.
• The common CMake build passes the flag without the LINKER: prefix.

_{Reviews (2) · Last reviewed commit: "Merge branch 'main' into fix/ep-linker-f..."}

[fheinecke]

Looks like our internal CI isn't triggering arm64 builds for PR CI runs, just amd64. CI pipeline run ID: 71705833

I'll approve/merge once this passes

[fheinecke]

This has passed CI sufficiently enough to show that it works