On Wed, May 26, 2010 at 8:25 PM, Wayne Meissner <wmeissner@gmail.com> wrote:

> Don't use 'libc' as the library, use FFI::Library::LIBC
>
> On linux, /usr/lib/libc.so is a linker script, not a library.  (you
> have to use libc.so.6, which is what FFI::Library::LIBC will be on
> linux)
>
> If thats in an example on the wiki, please correct it, or if its in
> the source tree, report and issue with a patch for it.
>

No, wiki says this:

http://wiki.github.com/ffi/ffi/basic-usage

module Hello
  extend FFI::Library
  ffi_lib LIBC
  attach_function 'puts', [ :string ], :int
end

Hello.puts("Hello, World")

But LIBC is not defined in that context, better be explicit:

ffi_lib FFI::Library::LIBC

Works even on Windows ;-)

ruby -v t.rb
ruby 1.8.7 (2010-01-10 patchlevel 249) [i386-mingw32]
Hello, World

-- 
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupéry