「Clang」 入门

官网： https://clang.llvm.org/

1 安装

1.1 源码

git clone https://github.com/llvm/llvm-project.git
cd llvm-project
mkdir build
cd build
cmake -DLLVM_ENABLE_PROJECTS=clang -G "Unix Makefiles" ../llvm
make
# This builds both LLVM and Clang for debug mode.
# Note: For subsequent Clang development, you can just run make clang.

1.2 检验

1. 尝试

   clang --help
   clang file.c -fsyntax-only # (check for correctness)
   clang file.c -S -emit-llvm -o - (print out unoptimized llvm code)
   clang file.c -S -emit-llvm -o - -O3
   clang file.c -S -O3 -o - # (output native machine code)
   

2. 测试

   make check-clang
   

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A 代码示例