# llvm_learn

**Repository Path**: zdking-ccpp/llvm_learn

## Basic Information

- **Project Name**: llvm_learn
- **Description**: llvm 技术积累
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-10-15
- **Last Updated**: 2024-09-10

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# llvm_learn

## 介绍
llvm 技术积累

## 安装组件
git  
cmake  
gcc  

## 编译命令
mkdir build && cd build  
cmake -DLLVM_ENABLE_PROJECTS=all -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" ../llvm  
make  

## 用clang组件编译

在llvm网站下载已经编译好的可执行文件/库  
wget https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/clang+llvm-12.0.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz -O clang+llvm-12.0.1-x86_64-linux.tar.xz

解压  
xz -d clang+llvm-12.0.1-x86_64-linux.tar.xz  
tar -xvf clang+llvm-12.0.1-x86_64-linux.tar  

将clang+llvm-12.0.1-x86_64-linux加到PATH env中  
export PATH=$PATH:/root/work/llvm_learn/clang+llvm-12.0.1-x86_64-linux/bin  

将库全部copy到/lib64下  
cp /root/work/llvm_learn/clang+llvm-12.0.1-x86_64-linux/lib/* /lib64  

安装libatomic，clang会使用这个链接库  
dnf install -y libatomic  

编译  
clang++ test.cc -o main-clang -isystem /root/work/llvm_learn/clang+llvm-12.0.1-x86_64-linux/include/c++/v1 -stdlib=libc++ -fuse-ld=lld    

```
[root@3a2c6180c612 kaleidoscope_toturial]# ldd main*
main-clang:
        linux-vdso.so.1 (0x00007ffc25bf6000)
        /$LIB/libonion.so => /lib64/libonion.so (0x00007fce63b4f000)
        libc++.so.1 => /lib64/libc++.so.1 (0x00007fce63761000)
        libc++abi.so.1 => /lib64/libc++abi.so.1 (0x00007fce63522000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fce631a0000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fce63b29000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fce62dde000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fce62bda000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fce629ba000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fce627b1000)
        libatomic.so.1 => /lib64/libatomic.so.1 (0x00007fce63b1d000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fce63a30000)
main-gcc:
        linux-vdso.so.1 (0x00007ffc6d38e000)
        /$LIB/libonion.so => /lib64/libonion.so (0x00007f3e1af93000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f3e1acdc000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f3e1a95a000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f3e1af6d000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f3e1a598000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f3e1a394000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f3e1ae74000)
```

### 教程地址

https://llvm.org/docs/tutorial/MyFirstLanguageFrontend/index.html