Re: Commit r28657

[Wolfgang Lux]

David Chisnall wrote:

> On 23 Sep 2009, at 08:54, Wolfgang Lux wrote:
>
> >  I assume that you really want to test the presence of libobjc2  
> > and take objc/runtime.h for granted (only) if using libobjc2
>
> No, it should be safe to include it on any platform where it's  
> present.  Longer term, when we are supporting the Apple runtime,  
> this will be included everywhere again.  A macro is defined in  
> libobjc2's runtime.h that lets us check for it.

Okay. In that case the modifications are even simpler. It should  
suffice to add the line

 AC_CHECK_HEADERS(objc/runtime.h)

to configure.ac and run autoconf and autoheader. You can check  
whether runtime.h is available with the feature test macro  
HAVE_OBJC_RUNTIME_H.

Wolfgang