https://github.com/iiicp/lcc

llvm-based c compiler
https://github.com/iiicp/lcc

Last synced: 1 day ago
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llvm-based c compiler

• Host: GitHub
• URL: https://github.com/iiicp/lcc
• Owner: iiicp
• License: mit
• Created: 2022-09-12T13:45:12.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2023-08-30T13:18:07.000Z (about 1 year ago)
• Last Synced: 2024-08-02T07:02:02.852Z (3 months ago)
• Language: C++
• Size: 523 KB
• Stars: 89
• Watchers: 5
• Forks: 17
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# lcc: A Based Of LLVM C Compiler

This is the source code Tutorial. Lcc is based llvm c99 compiler. You can click [this][1] to visit my video and this compiler tutorial.

This project will implement almost all ISO C99 syntax and can work on Windows, Linux and Mac OS X.

ISO C 99 Doc link (pdf file): [C99](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf)

## Current Status: 

|  Module     | Status     |     

|  ----       |------------|   

| Preprocess  | working... |   

| Lexer       | 100%       |      

| Parser      | 100%       |       

| Semantics   | 5%         |       

| CodeGen     | working... |    

## Test Status:

catch2 will be integrated in the future

## Compile and Run

### Install the latest LLVM library or Build LLVM manually

一：Install the latest LLVM library

```   

Mac:

----------------------

1, install homebrew 

reference: https://brew.sh/

or reference: https://brew.idayer.com/

2, brew install llvm

Linux:

----------------------

1, sudo apt-get update

2, sudo apt-get -y install llvm-12

Windows:

----------------------

reference:  https://blog.csdn.net/kingfox/article/details/117450533

```

二：Build LLVM manually

```

git clone https://github.com/llvm/llvm-project.git

cd llvm-project/llvm  && mkdir llvm_install_dir && mkdir build

cd build

cmake -GNinja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../llvm_install_dir ../llvm

```

### How to use lcc

一：Compile

```

1, git clone [email protected]:iiicp/lcc.git

2, cd lcc && mkdir build && cd build 

3, cmake -GNinja -DLLVM_DIR="Path to Your LLVM CMake dir" ..

4, ninja 

```

二：Run

lcc support --dumpTokens and --dumpAst command line options

```  

./lcc --help

./lcc -emit-tokens ../tests/c/stmt.c

./lcc -emit-ast ../tests/c/stmt.c 

```

## lcc unsupported c99 language features

1. unicode char     

2. _Complex      

3. direct-declarator ( identifier-list{opt} )     

eg: int f(a, b) int a,b {return a+b;}

## Reference   

- [cld](https://github.com/zero9178/cld)        

- [chibicc](https://github.com/rui314/chibicc)        

- [ucc](https://github.com/sheisc/ucc162.3)   

[1]: https://space.bilibili.com/181099947