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Port to Apple Silicon: modernize Xcode project for arm64 - #2

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Port to Apple Silicon: modernize Xcode project for arm64#2
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This updates the 2012-era Xcode project so iAvro builds and runs natively on Apple Silicon Macs (and still on Intel — the Release build is a universal binary).

Changes

  • Updated Xcode 4-era project settings to current recommendations (removes ZERO_LINK, GCC_MODEL_TUNING, and other obsolete settings)
  • Relinked sqlite3 and icucore as SDK .tbd stubs — the old absolute /usr/lib/*.dylib references no longer exist on modern macOS
  • Set minimum deployment target to macOS 11.0
  • Migrated localized resources from English.lproj to Base.lproj/en.lproj
  • Moved the bundle identifier into the PRODUCT_BUNDLE_IDENTIFIER build setting

Notably, no source code changes were needed — the original engine, parsers, and UI compile cleanly for arm64 as-is.

Tested on an Apple Silicon Mac running a current version of macOS: installs as an input method, types Bengali correctly with suggestions working.

A ready-to-install disk image is published here: https://github.com/aumi-sudo/iAvro-Apple-Silicon/releases/tag/v1.0-apple-silicon

🤖 Generated with Claude Code

- Update Xcode 4-era project settings to current recommendations
  (removes ZERO_LINK, GCC_MODEL_TUNING and other obsolete settings)
- Relink sqlite3 and icucore as SDK .tbd stubs; the old absolute
  /usr/lib dylib paths no longer exist on modern macOS
- Set minimum deployment target to macOS 11.0, sign to run locally
- Migrate localized resources from English.lproj to Base/en.lproj
- Move bundle identifier into PRODUCT_BUNDLE_IDENTIFIER build setting

Source code needed no changes; builds as a universal (arm64 + x86_64)
input method and verified working on Apple Silicon.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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