Re: MacOS X and 5.1: symbols not defined

[David Jones <drj@...>]

On Mar 24, 2005, at 18:33, Glenn Maynard wrote:

> On Thu, Mar 24, 2005 at 06:53:58AM -0300, Luiz Henrique de Figueiredo 
> wrote:
> > > Try adding
> > > extern "C" { }
> >
> > In 5.1 you can include lua.hpp, which will do this for you. It's in 
> > etc/.
>
> If it's not in /usr/include by default, it's not useful--if it's not in
> the includes that everyone has installed, I need to do it myself.  Why
> not just do this in .h files, like just about every other library?  (I
> can't think of any benefit to having a special header for this.)

Have you the question "Why isn't there an extern "C" block, required 
for C++, in the API header?" in the Lua FAQ at 
http://lua-users.org/wiki/LuaFaq ?

The answer is basically two-fold:

i) As a C library, Lua makes no special arrangements for access by 
foreign languages, including C++.

ii) The Lua source is compilable as C++ and therefore using extern "C" 
would be inappropriate.


What has /usr/include got to do with this?

David Jones