double precision issue

QNX DEVELOPERS General Programming
1

I have a small program, which exposes different behaviors between QNX GCC and Linux GCC.

#include <stdio.h>

double xx;

main()
{
xx = 8.386248e-02;
printf("%.2e = %e\n", xx, xx);
}

I got the following result on Neutrino with the compilation of QNX gcc 3.3.5,

8.3[color=red]8e-02 = 8.386248e-02

But I got different result as below on Linux with gcc,

8.3[color=red]9e-02 = 8.386248e-02

I checked the binaries generated by different compilers and found the double precision rawdata are the same like below,

    .long   -252304933
    .long   1068857346

So it looks like a glibc problem. Can anybody have answer on this?

Thanks,
-Jiangning