Random seed initialization

[Janus Weil]

Hi,

> Using my build of GCC-4.9.0 20130324, each run produces always this
>
> $ ./rnd_init.out
>  n=          12
>  clock:           0
>  seed:            0          37          74         111         148      185
> 222         259         296         333         370       407
>  random:   0.301754534      0.380439878      0.926293135 0.672118008
> 0.237815678      0.638214409      0.320253670 0.351599574      0.865273237
>
> It seems the call to SYSTEM_CLOCK() is failing..

right, this clearly confirms my suspicion that it's a problem with SYSTEM_CLOCK.


>> Might be a platform-specific problem (with SYSTEM_CLOCK?!?) ...
>
> ... or my build of GCC is not so good (see above for configure options)...

I have exactly zero experience with building GCC under Windows/Cygwin,
so I'm not of much help here. Also I don't have a Windows installation
to check this, but maybe someone else can confirm this problem on
Cygwin?

It would also be helpful if you could use a newer Cygwin-provided
build of gfortran (if available), or try to build 4.7 or 4.8 yourself
(to check if it's a regression on trunk).

Cheers,
Janus