Xcode Build Settings: Quick Help Shows You the Actual Key

Aug 17, 2026 |

xcode build-settings

Build Settings shows friendly names like “Swift Language Version,” but .xcconfig files and xcodebuild need the raw key. Option-click the setting (or select it and open the Quick Help inspector, ⌥⌘2/⌘⌥3) and the key shows up right there.

Swift Language Version → SWIFT_VERSION
Enable Bitcode          → ENABLE_BITCODE
Other Linker Flags      → OTHER_LDFLAGS

// Debug.xcconfig
SWIFT_VERSION = 5.0

Takeaway: don’t guess or grep the internet for a setting’s underlying name — option-click it in the Build Settings editor and Quick Help gives you the exact key to drop into an .xcconfig.

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