Re: Problems concerning preprocessor macros in ifconf.c

[Martin Jost]

David Masterson wrote:
> 
> >  # ifdef HAVE_ORTENTRY
> >     struct ortentry route;
> > -# else if HAVE_RTENTRY
> > +# elif HAVE_RTENTRY
> >     struct rtentry route;
> >  # endif
 
> If I recall correctly, some compilers preferred "#else if" while
> others preferred "#elif" (ANSI is "#elif").  So, for the greatest
> portability, this should probably be written as:
> 
> #ifdef HAVE_ORTENTRY
> ..
> #else
> #ifdef HAVE_RTENTRY
> ..
> #endif
> #endif


Yes, probably this would be the most generic way. I hoped for some
smaller but still standard way...
 
> Did you test your "else if"?  I don't think that does what you want.

"else if" is the way I found in the original file. Note the the diff
is from 'original' to 'patched'

Martin