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As far back as 2007 it was called clang. I'm not sure if it was called clang internally before that. See the seventh slide in the linked presentation. https://

• rgovostes 3y ago
  Apple has publicly referred to the compiler that they ship with Xcode as the "Apple LLVM Compiler", even though the command line tool was still "clang". E.g., `clang --version` might have reported "Apple LLVM version 7.0.0 (clang-700.1.76)" instead of what it says now, "Apple clang version 14.0.3" on my system. MacPorts suggests that the --version string changed in Xcode 11 with macOS 10.14 Mojave, but I don't know if the Clang name was reflected in the Xcode GUI at that point. https://trac.macports.org/wiki/XcodeVersionInfo https://trac.macports.org/wiki/XcodeVersionInfo