🚀 go-pugleaf

|->  From osborn@eecom.gatech.edu Tue Apr 14 09:00:15 1992
|->  Return-Path: <osborn@eecom.gatech.edu>
|->  Date: Tue, 14 Apr 1992 09:00:13 -0500
|->  To: help@eecom
|->  From: osborn@eecom.gatech.edu
|->  Subject: gcc compiler bug ?
|->  
|->  
|->  There appears to be a bug in the gcc compiler on the hp's.  (I have not
|->  tried the suns yet.)
|->  
|->  The following program shows that the absolute value function (fabs) does
|->  not except double precision variables, as the man pages indicate.
|->  
|->  #include <math.h>
|->  
|->  main(ac,av)
|->  int ac;
|->  char *av[];
|->  {
|->  
|->  double a,b;
|->  
|->  a = 1.7;
|->  b = 0.5;
|->  printf("x = %g\n",fabs(a-b));
|->  printf("x = %g\n",fabs((a-b)));
|->  printf("x = %g\n",fabs((double)(a-b)));
|->  printf("x = %g\n",fabs((float)(a-b)));
|->  printf("x = %g\n",fabs(a*b));
|->  }
|->  
|->  Who should this bug be reported to ??  
|->  
|->  Allan Osborn
|->  
|->  

Well, in playing around, I see that this is a bug with the optimization or
lack thereof.  If you use gcc -O, it compiles fine.