[all-commits] [llvm/llvm-project] 9175dd: [CMake] Detect properly new linker introduced in X...

[Eric Miotto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9175dd9cbcad01a47acea9f1b99a0c96bf1a9a29
      https://github.com/llvm/llvm-project/commit/9175dd9cbcad01a47acea9f1b99a0c96bf1a9a29
  Author: Eric Miotto <emiotto at apple.com>
  Date:   2024-01-19 (Fri, 19 Jan 2024)

  Changed paths:
    M clang/tools/driver/CMakeLists.txt
    M llvm/cmake/modules/AddLLVM.cmake

  Log Message:
  -----------
  [CMake] Detect properly new linker introduced in Xcode 15 (#77806)

As explained in [1], this linker is functionally equivalent to the
classic one (`ld64`) for build system purposes -- in particular to 
enable the use of order files to link `clang`. For this reason, in 
addition to fixing the detection rename `LLVM_LINKER_IS_LD64` to 
`LLVM_LINKER_IS_APPLE` to make the result of such detection more 
clear -- this should not cause any issue to downstream users, from 
a quick search in SourceGraph [2], only Swift uses the value of
this variable (which I will take care of updating in due time).

[1]: https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes#Linking
[2]: https://sourcegraph.com/search?q=context:global+LLVM_LINKER_IS_LD64+lang:cmake+fork:no+-file:AddLLVM.cmake+-file:clang/tools/driver/CMakeLists.txt&patternType=standard&sm=1&groupBy=repo
rdar://120740222