EV fails to install on OS X 10.7

[Alexey Borzenkov]

On Fri, Feb 3, 2012 at 12:21 AM, Alexey Borzenkov <snaury at gmail.com> wrote:
> 2. When EV_API_DECL is external, then extern struct ev_loop
> *ev_default_loop_ptr in ev_default_loop_uc_ is redundant, as there's
> prior declaration visible, and resulting linkage is external.

Sorry, should have been "resulting linkage is external/internal,
depending on whether ev_default_loop_ptr was declared static before
including ev.h". But still extern is redundant, I can't see what it's
supposed to do here. :-/