On 24/03/21 13:22 +0000, Koning, Paul via Libstdc++ wrote:
On Mar 24, 2021, at 4:59 AM, Jonathan Wakely via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
On 24/03/21 03:53 -0300, Alexandre Oliva wrote:
On target systems that don't support any random_device, not even the
default one,
It should be impossible to have no random_device.
Not true; deeply embedded systems might not have one. Among GCC platforms,
pdp11 doesn't have one, and at least some vax platforms probably don't either.
I'm talking about the C++ std::random_device type, not the /dev/random
block device.
As a fallback a
pseudo random number generator should be used.
Presumably yes -- it seems unlikely that GCC tests depend on cryptographic strength of
the random nummber generator. If a PRNG is used then the classic FORTRAN
"random" function would serve.
Libstdc++ already contains several PNRGs, we don't need to use
Fortran's.
