Is this portable in regards to OS & compiler

[define-private-public]

Hi.

I have a C++ project that uses PCG32 in conjunction with std::uniform_real_distribution(). Unfortunately the std::uniform_*() functions are [https://www.reddit.com/r/cpp/comments/7i21sn/til_uniform_int_distribution_is_not_portable/](not portable) across OS and compiler.

In my project some scenes use an RNG to place their objects. For about 70% of cases the object placement was the same on different compilers and operating systems (e.g. GCC & MSVC were the same on Linux and Windows), but sometimes some objects were placed differently (e.g. from clang on macOS & Linux) when using the same C++ code and random seed.

Is prrng 100% fully portable? I understand it uses PCG32 under the hood, but is its distribution function 100% portable across compilers and operating systems? If so, I'd really like to use.

[tdegeus]

Hi. Yes I think that the pcg32 implementation is fully platform independent due to the correct use of types (this is not my merit, see citations in the code). This produces a platform independent uniform distribution. Then porting to other distribution platform independently is sort of trivial up to floating point precision.

I have written this library precisely because I needed to regenerate distributions on different platforms. Please refer to the CI for tests. In doubt you can run them on your platforms to be sure.

[define-private-public]

Is there an easy way to "consume" this library? e.g. "Just include this one header and you're good to go?" Or is there some more stuff involved? I'm looking for a solution that relies on vanilla-as-possible-C++.

[tdegeus]

Just include the header (and the headers of needed/wanted libraries)