Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/wgtdkp/wgtcc
A small C11 compiler
https://github.com/wgtdkp/wgtcc
assembly c11 compilers cpp11 preprocessor
Last synced: about 17 hours ago
JSON representation
A small C11 compiler
- Host: GitHub
- URL: https://github.com/wgtdkp/wgtcc
- Owner: wgtdkp
- License: mit
- Created: 2016-01-12T12:57:40.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2021-01-31T07:55:46.000Z (almost 4 years ago)
- Last Synced: 2024-11-06T03:44:05.280Z (8 days ago)
- Topics: assembly, c11, compilers, cpp11, preprocessor
- Language: C++
- Homepage:
- Size: 7.89 MB
- Stars: 765
- Watchers: 42
- Forks: 130
- Open Issues: 18
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# wgtcc [](https://travis-ci.org/wgtdkp/wgtcc) [](https://codecov.io/gh/wgtdkp/wgtcc) 
A small _C11_ compiler in _C++11_.
## Environment
1. x86-64
2. linux 4.4.0
3. clang 3.8.0 (or any version supports C++11)
## Build
```bash
cmake . -Bbuild
cd build && make && make test
```
## Install
```bash
make install
```
Then you can play with the examples:
```bash
wgtcc example/heart.c
wgtcc example/chinese.c
```
## Without Install
Try this:
```bash
./wgtcc -no-pie -I../include ../example/heart.c
```
## Notice
As wgtcc doesn't support PIC/PIE, if you are using gcc >= 6.2.0, specify **_-no-pie_** explicitly:
```bash
wgtcc -no-pie example/heart.c
wgtcc -no-pie example/chinese.c
```
## Goal
**wgtcc** is aimed to implement the full C11 standard with some exceptions:
1. Some features are supported only in grammar level(like keyword _register_).
2. Features that disgusting me are removed (like default _int_ type without type specifier).
3. Some non standard GNU extensions are supported, but you should not rely on **wgtcc** of a full supporting.
## Front End
A basic recursive descent parser.
## Back End
**wgtcc** generates code from AST directly. The algorithm is TOSCA (top of stack caching). It is far from generating efficient code, but at least it works and generates code efficently.
## Memory Management
Through **wgtcc** was written in C++, I paid no effort for memory management except for a simple memory pool to accelerate allocations. _only_ _new_ is preferred because **wgtcc** runs fast and exits immediately after finishing parsing and generating code.
## Reference
1. Compilers Principles, Techniques and Tools. Second Edition.
2. [N1548, C11 standard draft](http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1548.pdf)
3. [64-ia-32-architectures-software-developer-manual-325462](http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-manual-325462.html)
4. [8cc](https://github.com/rui314/8cc)
5. [9c](https://github.com/huangguiyang/9c)
6. [macro expansion algorithm](https://github.com/wgtdkp/wgtcc/blob/master/doc/cpp.algo.pdf)
## Todo
- [ ] support GNU extensions (e.g. keyword \_\_attribute__)
- [ ] support variable length array
- [ ] optimization (e.g. register allocation)
- [x] support type qualification