A c++ puzzle for you gurus

[Peter Avalos]

On Wed, Dec 13, 2006 at 07:48:38AM -0800, walt wrote:
> In response to a post by Petr, I decided to take a stab at fixing
> pkgsrc/wip/powerdns-recursor.
> 
> I was able to fix a few obvious #ifdefs, but I'm still getting this
> c++ error (which doesn't happen in NetBSD):
> 
> c++ -O2 -I/usr/pkg/include -I/usr/include -Wall -O3  -I/usr/pkg/include
> -I/usr/include  -c -o syncres.o syncres.cc
> In file included from mtasker.hh:107,
>                  from syncres.hh:20,
>                  from syncres.cc:20:
> mtasker.cc: In member function `void MTasker<EventKey, EventVal>::yield()':
> mtasker.cc:196: error: there are no arguments to `swapcontext' that depend
> on a template parameter, so a declaration of `swapcontext' must be available
> 
> My bonehead compiler question is:  how did we get from 'from syncres.cc' to
> 'mtasker.cc' with no intermediate steps?
> 

The error message spells it out for you...syncres.cc includes syncres.hh
which includes mtasker.hh which includes mtasker.cc.  It even gives you line
numbers!

--Peter
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