regression in list directed write

[Paul Thomas]

>
> This works for me on i386-*-freebsd.  That error message
> originates in only 1 place in io/write.c in output_float.

Indeed, I just did a grep on the error message "printf is broken" to find 
that.

> To call output_float, you need to get pass an if()
> statement that uses isfinite() and isnan().  Are these
> functions working correctly on your target.
>

I had tested that printf and sprintf are correctly yielding NaN and 
Infinity.

However, isfinite and isnan are indeed broken in gcc-4.0 for both float and 
double.   isnan works for float in the Cygwin supplied gcc-3.3 but the other 
combos are broken.

#include <stdio.h>
#include <math.h>
int main( void)
  {
    float x =0.0, y=0.0;
    char outc[30];
    sprintf(outc , "x/y = %+-#31.*e" , 10 , x/y );
    printf("%s\n" , outc );
    printf("isfinite=%d  isnan=%d \n" , isfinite( x/y ) , isnan( x/y) );
    return 0;
  }


Paul Thomas