A binding generator for the rust language.
It is ported from clay's bindgen[1].

[1] https://github.com/jckarter/clay/blob/master/tools/bindgen.clay

Requirements
------------

* clang 3.4 and up

Building
--------

    $ rustc lib.rs
    $ rustc -L . bindgen.rs

Usage
-----

Usage: ./bindgen [options] input.h
Options:
    -h or --help           Display help message
    -l <name> or -l<name>  Link to a dynamic library, can be proivded
                           multiple times
    -static-link <name>    Link to a static library
    -framework-link <name> Link to a framework
    -o <output.rs>         Write bindings to <output.rs> (default stdout)
    -match <name>          Only output bindings for definitions from files
                           whose name contains <name>
                           If multiple -match options are provided, files
                           matching any rule are bound to.
    -builtins              Output bindings for builtin definitions
                           (for example __builtin_va_list)
    -abi <abi>             Indicate abi of extern functions (default C)
    -allow-bitfields       Don't fail if we encounter a bitfield
                           (note that bindgen does not support bitfields)
    -allow-unknown-types   Don't fail if we encounter types we do not support,
                           instead treat them as void
    -emit-clang-ast        Output the ast (for debugging purposes)

    Options other than stated above are passed to clang.

Example
-------

Generate MySQL client bindings

    bindgen -l mysql -match mysql.h -o mysql.rs /usr/local/include/mysql/mysql.h

or

    echo '#include <mysql.h>' > gen.h
    bindgen `mysql_config --cflags` -l mysql -match mysql.h -o mysql.rs gen.h

TODO
----

* bit field