Re: arborgames complile

[Paul Johnson]

Interesting. I've not tried this one for a while. Now, with gcc3, we are 
getting warnings about many small errors that were ignored by gcc-2.96

Follow the error. Look at line 126 in Species.m.

Think to myself, "where is the compiler supposed to find the program 
"exit"?"

Hmm.

Lets go looking

 $ cd /usr/include
 $ grep exit s*

In that output I spot:

stdlib.h:extern void exit (int __status) __THROW __attribute__ 
((__noreturn__));

So if at the top of Species.m, I insert an include for that, everything 
is OK:

#import <stdlib.h>

But then I was remembering that Swarm includes a "catch all" header file 
 "misc.h" and it includes stdlib.h, so instead of using that import, 
you can also do:

#import <misc.h>

-----------------------


Now, to save you some trouble and another message to the list, here is 
what happens when the compile continues:

gcc3 -c -g -O2 -march=i386 -mcpu=i686 -Wall -Wno-import -Wno-protocol 
-Werror  -D_GNU_SOURCE -DAPPNAME=arborgames -DAPPVERSION=2.1 
address@hidden   -I/usr/include/swarm 
ForestObserverSwarm.m
cc1obj: warnings being treated as errors
ForestObserverSwarm.m: In function `-[ForestObserverSwarm _drawGraphs:]':
ForestObserverSwarm.m:333: warning: multiple declarations for method `step'
ForestModelSwarm.h:35: warning: using `-step'
/usr/include/swarm/analysis.h:591: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:564: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:541: warning: also found `-(void)step'
ForestObserverSwarm.m:338: warning: multiple declarations for method `step'
ForestModelSwarm.h:35: warning: using `-step'
/usr/include/swarm/analysis.h:591: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:564: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:541: warning: also found `-(void)step'
ForestObserverSwarm.m:344: warning: multiple declarations for method `step'
ForestModelSwarm.h:35: warning: using `-step'
/usr/include/swarm/analysis.h:591: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:564: warning: also found `-(void)step'
/usr/include/swarm/analysis.h:541: warning: also found `-(void)step'
make: *** [ForestObserverSwarm.o] Error 1
make: Target `all' not remade because of errors.

Compilation exited abnormally with code 2 at Tue Dec 10 07:47:44

--------------------------------------

Note that in ForestModelSwarm.h, there is a method declared

-step;

But that does not match the declaration of step that we now have in the 
swarm libraries.  You see in the error messages, the libraries have

- (void)step;

and you can't introduce a method with the same name unless the 
declaration is exactly the same.

-(void)step {
  int total, i ;

  total = 0 ;

  for(i = 0 ; i < speciesNumber ; i++)
    total += [[speciesList atOffset: i] getCount] ;

  for(i = 0 ; i < speciesNumber ; i++)
    [[speciesList atOffset: i] setTotalNumberOfTrees: total] ;

  //  return self ;
}


After making corresponding changes in several of the files in this 
package, I get a clean compile and it runs just the way I remember it.

I will put the fixed version up in ftp sometime soon, but why not try 
this on your own?  If you try edit/compile in Emacs, it is easy work, 
and you will learn something.

Li An wrote:
> Hi,
>
> I tried to run make command at the arborgames-2.1 directory after I 
> changed the SWARMHOME to /usr, but have the following warning--still a 
> mismatch problem? how to fix the problem? Thanks. Li
>
> address@hidden arborgames-2.1]$ make
> gcc3 -c -g -O2 -march=i386 -mcpu=i686 -Wall -Wno-import -Wno-protocol 
> -Werror  -D_GNU_SOURCE -DAPPNAME=arborgames -DAPPVERSION=2.1 
> address@hidden   -I/usr/include/swarm Species.m
> cc1obj: warnings being treated as errors
> Species.m: In function `-[Species getLevelAtAge:]':
> Species.m:126: warning: implicit declaration of function `exit'
> make: *** [Species.o] Error 1
> Li An
> Systems Modeling Lab

--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700


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