The ajhc package

[Tags:gpl, library, program]

Ajhc is a fork of jhc. The jhc is a haskell compiler which aims to produce the most efficient programs possible via whole program analysis and other optimizations.

The jhc is very minimalist in that it does not have a precompiled run time system, but rather generates what is needed as part of the compilation process. However, back ends do have specific run-time representations of data, which can be affected by things like the choice of garbage collector.

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Dependencies ajhc, array, base (>=4.0 && <5), binary, bytestring, containers, directory, fgl, filepath, haskeline, HsSyck, HTTP, mtl, network, old-time, pretty, process, random, regex-compat, syb, temporary, unix, utf8-string, Win32, zlib [details]
License GPL-2
Author John Meacham <>
Maintainer Kiwamu Okabe <>
Stability Unknown
Category Compiler
Home page
Source repository head: git clone
Uploaded Fri Jun 7 17:24:22 UTC 2013 by KiwamuOkabe
Distributions NixOS:
Downloads 2920 total (38 in the last 30 days)
1 []
Status Docs uploaded by user
Build status unknown [no reports yet]




Maintainer's Corner

For package maintainers and hackage trustees

Readme for ajhc

Readme for ajhc-

Ajhc - arafura-jhc Build Status

A fork of jhc. And also a Haskell compiler.

This project is founded by Metasepi Project.

How to install

$ cabal install ajhc

How to build latest version

$ sudo apt-get install make locales autoconf libreadline-dev \
  libwww-perl libconfig-yaml-perl graphviz haskell-platform drift pandoc \
  libghc-readline-dev libghc-utf8-string-dev libghc-hssyck-dev
$ git clone git://
$ cd ajhc
$ git checkout arafura
$ autoreconf -i
$ ./configure
$ make
$ make install

For developing

First, you should use the arafura branch, rather than master branch.

You should send patch to jhc, if testing on Ajhc is good.

$ darcs get
$ cd jhc/
$ patch -p1 < ~/yourfile.patch
$ darcs record -a
$ darcs send

The command darcs send sends email the patch to jhc author (= John Meacham).

Needing to install/build on Windows (experimental)

Install msys

Install below.

  • C Compiler
  • MSYS Basic System
  • MinGW Developer ToolKit

You should run cabal install on msys console.

Install Git for Windows

It's good choosing the below option.

  • "Checkout as-is, commit as-is"
  • "Run Git and included Unix tools from the Windows Command Prompt"

Install Haskell Platform

Install DrIFT

$ cabal install DrIFT-cabalized

Future plan



  • No more depend on DrIFT. Use
  • No more depend on Perl (LWP and YAML).
  • Rewrite Cortex-M3 base library with Ajhc.
  • Analyze jhc internal (Japanese doc).
  • Find critical region of Ajhc for reentrant and thread safe.
  • Port Haskell libraries on haskell-platform to Ajhc.
  • Understand jhc's region inference.
  • Find the method to implement GC that can be interrupted.
  • Get smaller RTS. Benchmark the RTS for running on custom FPGA CPU.
  • Start rewritng NetBSD kernel with Ajhc.