[all-commits] [llvm/llvm-project] c0efcc: [libc] support fully OOT build (#101287)

[Schrodinger ZHU Yifan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c0efcc08e67325dc813d9acb7cc3560fd444fc8f
      https://github.com/llvm/llvm-project/commit/c0efcc08e67325dc813d9acb7cc3560fd444fc8f
  Author: Schrodinger ZHU Yifan <yifanzhu at rochester.edu>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    M libc/CMakeLists.txt
    M libc/newhdrgen/yaml_to_classes.py

  Log Message:
  -----------
  [libc] support fully OOT build (#101287)

Fully OOT build along with SCUDO:
```
mkdir oot
cp -r cmake libc compiler-rt oot
cp ./llvm/cmake/modules/* ./oot/cmake/Modules/
cd oot
mkdir build
cd build
cmake ../libc -DLIBC_USE_NEW_HEADER_GEN=On -DLLVM_LIBC_FULL_BUILD=On -DLLVM_LIBC_FULL_BUILD=On -DLLVM_LIBC_INCLUDE_SCUDO=On -DCOMPILER_RT_BUILD_SCUDO_STANDALONE_WITH_LLVM_LIBC=On -DCOMPILER_RT_SCUDO_STANDALONE_BUILD_SHARED=Off -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang -DLLVM_LIBC_COMPILER_RT_PATH=../compiler-rt/ -DCOMPILER_RT_STANDALONE_BUILD=On -GNinja -DLLVM_COMPILER_IS_GCC_COMPATIBLE=On -DLLVM_RUNTIMES_BUILD=On
```



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