Re: Here is the patch

[Gil Pinheiro <pinh1440@mach1.wlu.ca>]

> I tried for an hour or so to fix it up, but to no avail. Strangely enough the errors look
> slightly different sometimes. From my experience, the most likely reason for such errors
> (which are a bitch to pin down, btw) is problems with includes and inlining, or
> static/const breakage.
>
> Sorry. Someone else had more luck?
>
> Jens
>
>  
Your right about the annoying nature of the bug! It has never manifested 
in my windows build - likely there is some difference in the virtual 
table structure.

The fix turns out to be quite simple: in ai.h append =0 to the virtual 
function definitions. Silly error, but jeeze, it would be nice if gcc 
gave a better error.

to reiterate, fix ai.h  so that:
class AI {
public:
 AI( Mission &mission ) {};
 virtual void Play( void ) = 0;
 virtual const char* GetName() = 0;
 virtual unsigned short GetID() = 0;
 static AI *AIHelper(unsigned short id, Mission &mission); 
}

Also the linux build seems to have a few problems:
   AM_PATH_SDL issue that was mentioned on the list earlier is due to 
SDL standard install location, if you look at SDL_ttf or SDL_mixer the 
standard fix is to include acinclude.m4 with the source distribution.
   It may be a good idea in future to stick autogen.sh with the source 
dist. as well, I know its in the CVS, but it may be helpful.
   Also if you watch aclocal/autoconfig, there is an error about out of 
order calls - I'm no auto* expert, so I leave it to those who know more 
- if you can't reproduce it, I can always grab a copy of the error.