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https://github.com/ejunjsh/mycc
👻 my c compiler
https://github.com/ejunjsh/mycc
c cc compiler gcc self-compiling
Last synced: 29 days ago
JSON representation
👻 my c compiler
- Host: GitHub
- URL: https://github.com/ejunjsh/mycc
- Owner: ejunjsh
- Created: 2020-04-04T05:00:12.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2020-06-11T05:45:48.000Z (over 4 years ago)
- Last Synced: 2024-11-07T19:47:43.843Z (3 months ago)
- Topics: c, cc, compiler, gcc, self-compiling
- Language: C
- Homepage:
- Size: 205 KB
- Stars: 3
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# mycc
[](https://travis-ci.org/ejunjsh/mycc)
一个c的编译器, 基本代码来自参考里面的代码，修复部分bug，还有加上中文注释😄
基本实现了c的所有语法，应该说是c的一个子集,而且能够自举（自己编译自己）
这个编译器目前只支持linux（有时间看看能不能跑在macos）
## 编译
linux平台 gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0
make install
非linux平台
docker run -it -v $(pwd):/opt/tmp/ --rm -w /opt/tmp gcc make install
详细make命令，可以看[Makefile](https://github.com/ejunjsh/mycc/blob/master/Makefile)
## 使用帮助
````shell
# ./mycc
Usage: ./mycc [-vcSTM] [-o outfile] file [file ...]
-v give verbose output of the compilation stages
-c generate object files but don't link them
-S generate assembly files but don't link them
-T dump the AST trees for each input file
-M dump the symbol table for each input file
-o outfile, produce the outfile executable file
````
## 例子
````c
#include
#include
struct a{
union {
int b
} c; // 目前只支持嵌套一个struct/union声明，而且只能是第一个成员😭，或者在外面声明好，再到里面用吧😭
long k
};
struct a xx;
int kk=1;
void main(){
int* kkp=&kk;
*kkp=*kkp+1;
xx.c.b=1;
xx.c.b=xx.c.b+1;
struct a* sp=&xx;
sp->k=sp->k+2;
printf("hello world mycc! test output %d %d %d \n",*kkp,xx.c.b,sp->k);
}
````
编译
./mycc -o hello examples/helloworld.c # 编译
./hello # 执行
hello world mycc! test output 2 2 2 # 输出
## 自举测试
````shell
# make clean quad
rm -f mycc mycc[0-9] *.o *.s out a.out incdir.h
echo "#define INCDIR \"/tmp/include\"" > incdir.h
cc -o mycc -g -Wall cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
mkdir -p /tmp/include
cp -a include/. /tmp/include
cp mycc /tmp
chmod +x /tmp/mycc
./mycc -o mycc0 cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
./mycc0 -o mycc1 cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
./mycc1 -o mycc2 cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
size mycc[012]
text data bss dec hex filename
97560 2972 48 100580 188e4 mycc0
97560 2972 48 100580 188e4 mycc1
97560 2972 48 100580 188e4 mycc2
````
可以看到自己编译自己的mycc0，mycc1，mycc2大小一致，证明成功
````shell
# make clean test
rm -f mycc mycc[0-9] *.o *.s out a.out incdir.h
echo "#define INCDIR \"/tmp/include\"" > incdir.h
cc -o mycc -g -Wall cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
mkdir -p /tmp/include
cp -a include/. /tmp/include
cp mycc /tmp
chmod +x /tmp/mycc
(cd tests; chmod +x runtests; ./runtests)
input001.c: OK
input002.c: OK
input003.c: OK
# 省略
input149.c: OK
input150.c: OK
````
这个是gnu c 编译器编译出来的mycc的test case成功
````shell
# make clean test0
rm -f mycc mycc[0-9] *.o *.s out a.out incdir.h
echo "#define INCDIR \"/tmp/include\"" > incdir.h
cc -o mycc -g -Wall cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
mkdir -p /tmp/include
cp -a include/. /tmp/include
cp mycc /tmp
chmod +x /tmp/mycc
./mycc -o mycc0 cg.c decl.c expr.c gen.c main.c misc.c opt.c scan.c stmt.c sym.c tree.c types.c
(cd tests; chmod +x runtests0; ./runtests0)
input001.c: OK
input002.c: OK
input003.c: OK
# 省略
input149.c: OK
input150.c: OK
````
这个是mycc编译器编译出来的mycc0的test case成功
## 参考
https://github.com/DoctorWkt/acwj