fix hotspot build failures with -D_FORTIFY_SOURCE=2 and -Wformat=1

[Tom Tromey]

>>>>> ">" == Xiaobin Lu <Xiaobin.Lu at Sun.COM> writes:

>> I agree it is ugly to use a unused local variable to make the
>> aggressive compiler happy, but I don't find other options such as
>> pragam etc to get around this.

You could try an inline wrapper function.  This did not warn for me:

    int fn () __attribute__ ((warn_unused_result));
    static inline int fn2() { return fn (); }
    int foo ()
    {
      fn2 ();
      return 0;
    }

I don't know whether or not this would be considered a bug in gcc,
though.

Tom