Floating exception bug

[David Messer]

I don't know if this has been reported yet, but the following code
causes a "Floating exception error" and a core dump when run in a
system with an 80287 co-processor.  (I don't know if it generates an
error when floating point operations are emulated with software.)

------File x.c
main()
{
	/*extern double y();*/
	for(;;) {
		y() ;
		}
	}
------File y.c
double
y()
{
	return( 1.0 ) ;
	}
------
Compile with:
	cc x.c y.c

and execute a.out.

The fix is to uncomment "extern double y();" in main().  Since the value
returned from y() is not used, no extern definition should be required.

Apparently if the function is not declared double, it uses up resources
in the floating-point chip which eventually causes an error.  It was a
real bear to find because the error could occur on any floating-point
operation once the resources got too low.
-- 
_____________________________________________________________________________
   __                     _ _ _              David Messer - Lynx Data Systems
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