gcc -ansi produces unexpected floating point result

["Paul Edwards" <mutazilah at gmail dot com>]

/* This program demonstrates a presumed bug in gcc 3.4.4 shipped
  with cygwin.

  If compiled with gcc -mno-cygwin -ansi, it prints:

C:\devel\bwbasic>gcc -mno-cygwin -ansi zatest.c

C:\devel\bwbasic>a
0.000000
2.000000

  Instead of the expected 2.000000 for the first line, and undefined
  for the second line.

  Without -ansi it produces a good result.

*/

#include <stdio.h>

int main(void)
{
   double x = 2.0;

   printf("%lf\n", x);
   printf("%f\n", x);
   return (0);
}


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