Rollup of 9 pull requests#142399

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matthiaskrgr wants to merge 29 commits intorust-lang:masterfrom

matthiaskrgr:rollup-ky6ondi

Commits on Mar 10, 2025

Commits on Jun 3, 2025

Update ABI compatibility docs about null-pointer-optimized enums.
zachs18
committed

Commits on Jun 7, 2025

docs: autogenerate compiler flag stubs based on -Zhelp
rmehri01
committed

Commits on Jun 9, 2025

Commits on Jun 10, 2025

core docs: improve clarity of considerations about atomic CAS operations
fu5ha
committed

Commits on Jun 12, 2025