Re^3: randfunc in Config

Hi afresh1, thanks for the reply. I guess that testing the values for a known seed should be enough, but maybe Syntax::Construct should emit a warning if the $Config{randfunc} is different to Perl_drand48 . The reasoning is: why would anyone need Perl_drand48 ? Either to get a predictable sequence for a given seed, or to have a better algorithm than the previous one (on some platforms, e.g. MSWin), which both holds for OpenBSD's rand. But maybe I'm too optimistic...

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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Re^4: randfunc in Config by afresh1 (Hermit) on Jul 15, 2016 at 15:19 UTC
I too am not sure what reasons anyone would have for wanting to know which random number generator is behind `rand()`. If they do care, I would hope they would use a module of some sort that brings some guarantees of randomness with it. I know Dana Jacobsen has spent a lot of time thinking about this. l8rZ, -- andrew	[reply] [d/l]
Re^5: randfunc in Config by choroba (Cardinal) on Jul 15, 2016 at 15:32 UTC
For the time being, I added a warning if Perl version is 5.20+ and rand isn't implemented by `Perl_drand48` ; in the test, I switched to testing a sequence with a known seed. If interested, you can check Fix drand48 test on OpenBSD and Warn if rand is not implemented via Perl_drand48 on GitHub. ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l] [select]