[Mesa3d-dev] Re: [Mesa3d-users] configure problem (was Missing GLX extensions)

[Dirk R. <re...@ig...>]

On Mar 21,  5:36pm, Sven M. Hallberg wrote:
> Subject: Re: [Mesa3d-users] configure problem (was Missing GLX
extensions)
>
> Well I guess we'll just change it there for now and leave everything
> else untouched unless it becomes a problem.

OK.

>
> Right. Are those two preprocessor macros or real variables?

I think the former. Does it make a difference and how do I check?

> Hehe. I've noticed that flag, too. Actually asked about it's purpose on
> mesa3d-dev. Generates a warning on my system, so I'm ignoring it until
someone
> tells me I can safely remove it (*wink*).

Well, it creates an error on Irix, i.e. no compile. If nobody knows what
it's good for, maybe now is a good time to get rid of it. ;)

> libCio? Never heard of that. And what does it have to do with C++
streams?
> Can you give me a description of the circumstances under which this
library is
> needed so I can model a proper check for it? It's not available on my
machine.

It's part of the current STL. It contains the little code that is created
and needed by STL, mainly stream stuff, some complex number functions etc.

It is needed on Irix as soon as the 'std' namespace STL is used (BTW, if
that happens you also need the -LANG:std option). You can easily test if
you need by running the following program:

#include <iostream>

int main( int argc, char *argv[] )
{
        std::cout;
}

If it works you don't need to do anything special, if it gives an error
you need -lCio. By default the compiler includes it automatically, but
libtool apparently works around that, so you'll have to use libtool to
check it.

I don't really understand why it is needed for si-glu, I couldn't find
streams in there, maybe it was something else. It's just confusing that
you don't need the -LANG:std option, usually it complains if you use the
std namespace, and if you don't use that, why does it need the libCio.so?
Something's fishy here but I'm not sure what it is.

>-- End of excerpt from Sven M. Hallberg

Yours

	Dirk

-- 
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