Brad King wrote: > On 12/14/2014 08:36 AM, Rolf Eike Beer wrote: > > The idea behind this API in OpenBSD is: if you are looking for the pseudo > > numbers you need to call srand_deterministic(), i.e. you must explicitely > > state that you want the not really random random numbers. Everyone else > > will get real random. > > CMake uses /dev/urandom on POSIX and wincrypt APIs on Windows to choose > the seed specifically to get "really" random behavior. The *only* reason > we continue to use s/rand() at all is to support the RANDOM_SEED API in > string(RANDOM), AFAIK. > > One approach to dealing with this is to refactor the implementation of > string(RANDOM) to use non-deterministic APIs until RANDOM_SEED is used > and then use deterministic APIs after that. That will get better random > values by default but still honor the existing API when it is used.
Which is what we would get if we do not call srand_deterministic() on OpenBSD afaict. We would get weaker random numbers on other platforms, but I doubt this matters at all. Eike --
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