{$LAZYCASING ON/OFF} for C imports only

• Type: feature
• Status: done
• Owner: —
• Blocked-by: feature-compiler-warnings
• Opened: 2026-06-06 (from todo.md §4)

Motivation

Compatibility convenience for imported C APIs: after an exact-case lookup fails, allow a case-insensitive fallback only for C-imported symbols, and only when exactly one matches. A convenience for imported APIs, not a Pascal mode.

Scope

• New {$LAZYCASING ON/OFF} switch, default off.
• Fallback applies to C-import symbols only; ambiguous matches rejected.
• Preserve each declaration's exact spelling for ELF linkage.
• Must NOT weaken {$CASESENSITIVE ON} Pascal code.
• Prerequisite: warnings support, so accepted spelling mistakes are visible.

Acceptance

A C-import call with wrong case resolves under {$LAZYCASING ON} (single match), emits a warning, links to the exact symbol; ambiguous case errors; Pascal case rules unaffected.

Log

• 2026-06-06 — ticket opened from todo.md §4.
• 2026-06-22 — resolved, commit a9251ff.