Rollup of 7 pull requests

[Dylan-DPC-zz]

Successful merges:

• Do not allocate or unwind after fork #81858 (Do not allocate or unwind after fork)
• illumos should put libc last in library search order #84254 (illumos should put libc last in library search order)
• Unify rustc and rustdoc parsing of cfg() #84442 (Unify rustc and rustdoc parsing of cfg())
• Cleanup of wasm #84655 (Cleanup of wasm)
• linker: Avoid library duplication with /WHOLEARCHIVE #84866 (linker: Avoid library duplication with /WHOLEARCHIVE)
• rustc: Support Rust-specific features in -Ctarget-feature #84991 (rustc: Support Rust-specific features in -Ctarget-feature)
• Rearrange SGX split module files #85030 (Rearrange SGX split module files)

Failed merges:

r? @ghost
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