Re: compiling gui with clang/libobjc2 failure

[Luboš Doležel]

On Fri, 1 Feb 2013 08:34:03 +0000, David Chisnall wrote:
> On 1 Feb 2013, at 07:36, Sebastian Reitenbach wrote:
>
> > #  ifdef __BLOCKS__
> > #    include <dispatch/dispatch.h>
> > #  endif /* __BLOCKS__ */
>
> This is definitely a cups problem.  They are assuming that blocks
> support (a compiler feature) implies the presence of libdispatch (a
> library).  I don't know if libdispatch has been ported to OpenBSD.
>
> I think the -base configure checks for the presence of libdispatch
> because we use it for parallel array operations, so the best thing to
> do is use that macro to conditionally #undef __BLOCKS__ before
> including cups.h
>
> David

Yep, I hit the same problem on Linux. I simply edit the CUPS header 
file and remove the include... Apple, which runs the CUPS development 
now, apparently assumes that blocks support is OS X-only.

Reminds me of a similar issue with unistd.h from glibc that uses 
"__block" for an argument name. And they reject changing the 
(irrelevant) name to something else.

--
Luboš Doležel