https://github.com/meithecatte/cursedcc

a C compiler written in bash
https://github.com/meithecatte/cursedcc

Last synced: 25 days ago
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a C compiler written in bash

• Host: GitHub
• URL: https://github.com/meithecatte/cursedcc
• Owner: meithecatte
• License: other
• Created: 2023-11-02T12:20:22.000Z (about 1 year ago)
• Default Branch: master
• Last Pushed: 2024-10-26T13:40:58.000Z (2 months ago)
• Last Synced: 2024-11-26T21:59:33.744Z (about 1 month ago)
• Language: Shell
• Size: 211 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# cursedcc

cursedcc is a C compiler written in bash targeting x86\_64 platforms

making use of the System V ABI and ELF object format.

## External programs used

- `dirname` is used in `cc.sh` to resolve the compiler installation directory

  and source all the other `.sh` files. I am not aware of any way of avoiding

  calling this external program that correctly handles the case where `cc.sh`

  itself is a symlink.

- unless suppressed with `-c`, the system linker is called

  (`cc` with `.o` files as arguments) to create an executable

  after emitting the object file. In this case, `mktemp` and `rm` are also invoked

  to handle the temporary object file.

- unless suppressed with `-p`, the system preprocessor is called (`cpp`)

  to preprocess the file.

The latter two are because I wanted to focus on the actual compiler first, and

might get replaced by bash implementations at some point if I hate myself enough.

## Subset of language implemented

Currently, the compiler implements only a subset of the C language. 

- The only implemented type is `int`

- Control flow

  - [x] `if`, `else`

  - [x] `for`, `while`, `do`-`while`

  - [x] ternary operator `?`

  - [x] short-circuiting binary operators `&&`, `||`

  - [x] `goto`

  - [ ] `switch`

- Expressions

  - [x] arithmetic and binary operators

  - [ ] compound assignment `+=`, `*=`, etc.

  - [ ] increment and decrement operators `++`, `--`

- Functions

  - [x] function declarations

  - [x] calls to external functions

  - [ ] `static` functions

- File-scope variables

  - [x] Global variables

  - [ ] `static` variables

  - [ ] `extern` variables

- [ ] Local `static` variables