[PATCH] D106305: [compiler-rt][CMake] create aarch64 helper asm during configure time

[Steven Wu via Phabricator via llvm-commits]

steven_wu added a comment.

The configured directory is rather large so let me give some more detail from the makefile generated. The custom target is generated in two of the makefiles I mentioned above, like following:

  projects/compiler-rt/lib/builtins/outline_atomic_helpers.dir/outline_atomic_cas1_1.S:
          @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --blue --bold --progress-dir=/Users/steven/makefile_build/CMakeFiles --progress-num=$(CMAKE_PROGRESS_1) "Generating outline_atomic_helpers.dir/outline_atomic_cas1_1.S"
          cd /Users/steven/makefile_build/projects/compiler-rt/lib/builtins && /usr/local/bin/cmake -E create_symlink /Users/steven/llvm-project/compiler-rt/lib/builtins/aarch64/lse.S /Users/steven/makefile_build/projects/compiler-rt/lib/builtins/outline_atomic_helpers.dir/outline_atomic_cas1_1.S

When you build the clang builtin library, it does:

  $ make -j 32 clang_rt.osx VERBOSE=1
  ...
  /usr/bin/make  -f projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins_arm64_osx.dir/build.make projects/compiler-rt/lib/        builtins/CMakeFiles/clang_rt.builtins_arm64_osx.dir/depend
  /usr/bin/make  -f projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins_arm64e_osx.dir/build.make projects/compiler-rt/lib/       builtins/CMakeFiles/clang_rt.builtins_arm64e_osx.dir/depend
  ...
  CMake Error: failed to create symbolic link '/Users/steven/makefile_build/projects/compiler-rt/lib/builtins/outline_atomic_helpers.dir/outline_atomic_ldset1_3.S': file already exists
  ``


Repository:
  rG LLVM Github Monorepo

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