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From: sshimoji@nunki.usc.edu (Shunichi Shimoji)
Newsgroups: comp.sys.mac
Subject: LSC math libraries on SE/30
Message-ID: <4150@merlin.usc.edu>
Date: 20 Jun 89 08:00:16 GMT
Sender: news@merlin.usc.edu
Reply-To: sshimoji@nunki.usc.edu (Shunichi Shimoji)
Organization: University of Southern California, Los Angeles, CA
Lines: 33

I have a trouble when using a LSC with co-processor on MacSE/30.
Could anyone give a help for this novice question?

The source file is shown below.
I compiled it with MacTraps, stdio and Math libraries,
and it produced correctly:
	log(100.000000)=4.605170

But when I used MathHybrid instead of Math, it produced
	log(?)=-0.000434
and when Math881, it even gave the link error
	undefined: log

I defined _MC68881_ macro for MathHybrid and Math881.
Why do they NOT work correctly?
Do I need recompile the libraries?
Is MC68882 not upper-compatible with MC68881?
I am using System6.02 and LSC v3.01 on MacSE/30.

------------------ Source Code ---------------------
#define _ERRORCHECK_
#define _MC68881_   /* This is commented in when using Math */
#include <stdio.h>
#include <math.h>

main()
{
   double x = 100.0;
   printf("log(%f)=%f\n",x,log(x));
}
----------------------------------------------------
S.Shimoji
sshimoji@nunki.usc.edu