## MLton 20241230

# CKitLibrary

The ckit Library is a C front end written in SML that translates C source code (after preprocessing) into abstract syntax represented as a set of SML datatypes. The ckit Library is distributed with SML/NJ. Due to differences between SML/NJ and MLton, this library will not work out-of-the box with MLton.

As of 20241214, MLton includes a port of the ckit Library synchronized with SML/NJ version 110.99.6.1.

## Usage

- You can import the ckit Library into an MLB file with:

  MLB file | Description
  --- | ---
  `$(SML_LIB)/ckit-lib/ckit-lib.mlb` |

- If you are porting a project from SML/NJ’s CompilationManager to MLton’s ML Basis system using `cm2mlb`, note that the following map is included by default:

      # ckit Library
      $ckit-lib.cm                            $(SML_LIB)/ckit-lib
      $ckit-lib.cm/ckit-lib.cm                $(SML_LIB)/ckit-lib/ckit-lib.mlb

  This will automatically convert a `$/ckit-lib.cm` import in an input `.cm` file into a `$(SML_LIB)/ckit-lib/ckit-lib.mlb` import in the output `.mlb` file.

## Details

The following changes were made to the ckit Library, in addition to deriving the `.mlb` file from the `.cm` file:

- `ast/pp/pp-ast-adornment-sig.sml` (modified): Rewrote use of `signature` in `local`.

- `ast/pp/pp-ast-ext-sig.sml` (modified): Rewrote use of `signature` in `local`.

- `ast/type-util-sig.sml` (modified): Rewrote use of `signature` in `local`.

- `parser/parse-tree-sig.sml` (modified): Rewrote use of (sequential) `withtype` in signature.

- `parser/parse-tree.sml` (modified): Rewrote use of (sequential) `withtype`.

## Patch

- `ckit.patch`