2009/12/22 John Croisant <jacius@gmail.com>:

> On Sat, Dec 19, 2009 at 6:35 AM, Wayne Meissner <wmeissner@gmail.com> wrote:

>> You need to list them all on the same line.
>>
>> i.e.
>>
>>  ffi_lib 'user32', 'msvcrt'

>
> I always thought that giving multiple args to ffi_lib was a way of
> providing fallback libraries /alternate names in case the first one
> failed. I guess I assumed that it didn't make sense (or wouldn't work)
> to load more than one library into the same module, anyway. I'm not
> sure why I assumed that, though.

the way ffi_lib handles multiple args changed in 0.6:

now, ffi_lib "a", "b", "c" will fail if _any_ of a, b, or c fail to load.

If you need alternate library names (e.g. for linux shared libs), you can use []
e.g.
# try to load libncurses, fall back to libncurses.so.5 on linux if
that fails, but also load libc
ffi_lib [ "ncurses", "libncurses.so.5" ], FFI::Platform::LIBC

However, a better idea is probably to use NiceFFI and its find_library function.