c2hs - C->Haskell Interface Generator

c2hs [OPTIONS]... header-file binding-file

This manual page briefly describes the c2hs command. For more details, refer to the main documentation, which is available in various other formats, including SGML and HTML; see below.

The programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options are included below. For a complete description, see the other documentation.

c2hs accepts the following options:

-h, -?, --help

brief help

-v, --version

show version information

-c CPP, --cpp=CPP

use executable CPP to invoke C preprocessor

-C CPPOPTS, --cppopts=CPPOPTS

pass CPPOPTS to the C preprocessor

-d TYPE, --dump=TYPE

dump internal information (for debugging), where TYPE is one of:

• trace

trace compiler phases

• chs

dump the binding file (adds .dump to the name)

-o FILE, --output=FILE

output result to FILE (should end in .hs)

-k, --keep

keep pre-processed C header

header-file is the header file belonging to the marshalled library. It must end with suffix .h.

binding-file is the corresponding Haskell binding file, which must end with suffix .chs.

The most useful of these options is probably --cppopts (or -C). If the C header file needs any special options (like -D or -I) to go through the C pre-processor, here is the place to pass them.

The C->Haskell Interface Generator is usually called as:

c2hs lib.h Lib.chs

where lib.h is the header file and Lib.chs the Haskell binding module, which define the C- and Haskell-side interface, respectively. If no errors occur, the result is a pure Haskell module Lib.hs, which implements the Haskell API of the library.

A more advanced call may look like this:

c2hs --cppopts='-I/some/obscure/dir -DEXTRA' lib.h Lib.chs

Often, lib.h will not be in the current directory, but in one of the header file directories. Apart from the current directory, C->Haskell looks in two places for the header: first, in the standard include directory of the used system, this is usually /usr/include and /usr/local/include; and second, it will look in every directory that is mentioned in a -IDIR option passed to the pre-processor via --cppopts.

Do not forget the quotes if you have more than one option that you want to give to the pre-processor.

c2hs-config(1)

/usr/share/doc/html/c2hs.html

C->Haskell Version 0.13.6 Copyright (c) [1999..2002] Manuel M. T. Chakravarty <chak@cse.unsw.edu.au>

This manual page was mainly assembled from the original documentation.

It was written by Michael Weber <michael.weber@post.rwth-aachen.de> for the Debian GNU/Linux system (but may be used by others).